scolv

Origin locator view

Description

scolv

scolv: OriginLocatorView Location tab with event and phase information

scolv picker

scolv: OriginLocatorView phase picker with waveforms and phase information

scolv picker

scolv: OriginLocatorView Event tab with all origins

scolv picker

scolv: OriginLocatorView amplitude waveform review with station magnitudes

scolv is the main interactive tool to revise or review the origin information such as picks, location, depth, time, magnitudes and event association. Therefore, scolv is divided into 6 main logical units (main window with tabs and external windows):

  • Location: (tab) Details of the selected origin

  • Magnitudes: (tab) Magnitude details of the selected origin

  • Event: (tab) Origins and focal mechanisms referenced by the selected event

  • Events: (tab) Table of event parameters of the loaded events

  • Phase picker: (external window) Waveform review for phase picking

  • Amplitude waveform review: (external window) Waveform review for measuring amplitudes and for computing magnitudes.

scolv provides the whole functionality to review and revise earthquake parameters.

Location tab

The Location tab shows detailed information of the associated phases and the residuals from the chosen origin additional information about the hypocenter, time, station distribution, helps to find outlier.

../_images/tab_location.png

Location tab of scolv with summary widget to the left.

(Redo/Undo) Switch to last/next location result (Tab 1-4) Location/Magnitude/Event/Events tab (Map) map with the event location, associated stations, the color coded residuals (red-positive, blue-negative) and ray paths (Information) Origin information including time, epicentre, depth, number of used and available phases, RMS, azimuthal gap and minimum station distance (List) Table of associated arrivals (phases) containing stream information and phase information (Tab 5-10) Arrival residual plots against distance and azimuth (linear and polar) in a separate tab (Plot) Arrival residual plot (distance over residual in seconds) (Depth) Checkbox to fix to a defined depth (B1) Relocate with the given arrival information (B2) Open Manual Picker (B3) Import picks of other automatic origins belonging to the same event (B4) Compute magnitudes (B5) Commit origin (Summary) all information of the preferred origin of the loaded event

Summary widget

The summary widget in the Location tab contains two other tabs: Preferred and Current. Preferred reflects the current official (database) state of the event while Current shows the current solution (location and magnitudes). Activate the Summary widget by pressing F8 or from the View menu.

Note

The summary tab is available for all other tabs of the scolv main window and also for other GUI applications.

Diagrams

The default arrival residual plot is shown in the figure above. Additional plots are available to analyze arrivals which can be shown by activating the corresponding tab.

In these diagrams, arrival can be activated or deactivating for relocating by clicking on a point or by selecting a range using mouse drag. Deselecting is available by mouse drag when pressing kbd:Ctrl.

../_images/tab_location_plots.png

Additional arrival plots in Location tab of the main window

From upper left to lower right: 1) azimuth vs distance, 2) travel time vs distance, 3) travel time - predicted travel time vs distance, 4) azimuth vs distance polar

The move out plot uses the reduced travel time with a default reduction velocity of 6km/s. This value is configurable by olv.Pvel, either in the configuration file or in the settings window, e.g.:

# Reduction velocity used for move out plot
olv.Pvel = 6.0

The diagrams in the scolv Location tab present observations (e.g. arrival residuals). Each plot is also interactive to select a subset of data or to zoom into a region.

A plot filter can be defined. Filtering means that arrivals that match the filter are not plotted. They are filtered out visually. To enable a filter click the link “not active” right below the plot tabs. A setup window pops up where the filter can be defined. Currently only a filter by azimuth around epicenter can be applied.

../_images/plot-filter-setup.png

Select the center azimuth and the extent to either side. If OK is pressed all arrivals that fall outside the defined azimuthal area are hidden from the plot and the line below the tabs turns into “Filter is active”. Clicking on the link again and select the “None” filter will show all arrivals in the plot again.

Plots can also be configured to show or hide dashed grid lines. Use olv.drawGridLines for configuration. The default is true.

Arrival table

The arrival table shows all arrivals of the current origin. The columns are sortable by clicking on the corresponding header item. Additional data columns can be shown or active columns can be hidden, either initially or interactively. Available column identifiers are:

  • Used

  • Status

  • Phase

  • Weight

  • Method

  • Polarity

  • Takeoff

  • Net

  • Sta

  • Loc/Cha

  • Res

  • Dis

  • Az

  • Time

  • Timeres

  • Slo

  • Slores

  • Baz

  • Bazres

  • +/-

  • Created

  • Latency

The columns printed bold are shown initially. The initial column list can be changed in scolv.cfg by adjusting :confval:` olv.arrivalTable.visibleColumns`:

olv.arrivalTable.visibleColumns = Used, Status, Weight, Phase, Net, Sta,\
                                  Loc/Cha, Res, Dis, Az, Time, +/-

The user can also interactively select what columns are be visible or hidden from a context menu which pops up after a right click on the table header.

../_images/arrivals-header-context.png

The checkbox in the first column indicates if the arrival was used for locating the origin. The overall usage state of arrival contains three flags: arrival time used, backazimuth used and slowness used. If any of these flags is active then the overall usage state is active as well. The arrival table shows those flags indicated by T for pick time, S for horizontal slowness and B for backazimuth. A flag is rendered with a dash if the referred pick does not contain the corresponding feature. For example, if a pick does not carry a backazimuth measure then the backazimuth flag is disabled. It would not make sense to activate backazimuth usage without a corresponding measure.

In most cases, only the time flag, indicated by the capital T, will be active. The other two flags are rendered with dashes, meaning that they are inactive. Background: an arrival refers to a pick which can hold several features. The basic feature a pick must hold is the pick time. Some modules such as for array processing might compute additional pick features. Such features can be the backazimuth and the horizontal slowness. Locators like LocSAT were developed to use those features to increase the precision of a location. Special applictions are locations based borehole networks with poor azimuthal coverage or locations with very few stations.

There may be cases where a backazimuth measure of a pick should not be used by the locator. In contrast, if a backazimuth is available but the timing is bad, disabling the use of the pick time but including the backazimuth may be advantageous. For that a simple weight value is not enough. With a weight one cannot separate whether or not to use a particular feature. So the arrival does not only refer to a pick but holds flags indicating which features of that pick should be used for locating.

../_images/arrival-flags.png

Single or multiple rows can be selected in the table. The selection of multiple rows works either with Ctrl+LeftMouse (add single row) or Shift+LeftMouse (range selection).

When pressing the right mouse button on a selected row a context menu pops up. If an unselected row is used, the current selection will be reset and only the row below the mouse is selected.

The context menu allows to: * select arrivals based on a certain criterion * activate/deactivate selected pick features * delete selected arrivals * rename phases of selected arrivals

../_images/arrivals-context.png

If arrivals are deleted, they are removed physically from this solution in contrast to deactivate an arrival where only the used flags are set to zero.

Waveform review (Picker)

The Picker button opens the interactive waveform picker window. It allows to pick additional phases, to confirm picks, to add additional pick information such as polarity and uncertainty, to rotate traces and much more.

It is divided into two parts, the zoom trace and the trace list. The zoom trace shows a sub area of the active trace in the list.

../_images/picker.png

Initially the picker shows only the vertical channels for each station that have been associated with the current location. It can be configured to show all three components.

Initially the picker allows to pick the following phases:

  • P

  • Pn

  • Pg

  • pP

  • S

  • Sg

This list can be customized and phases can be grouped to reflect e.g. regional and teleseismic profiles. An example configuration looks like this:

# Define two phase groups: regional and teleseismic
picker.phases.groups = regional, teleseismic

# Define all phases of group "regional"
picker.phases.groups.regional = Pn, P, Pg, PmP, P1, Sg, S, Sn, SmS

# Define all phases of group "teleseismic"
picker.phases.groups.teleseismic = pP, PKP, PKP

# Define a list of favourite phases for quick access
picker.phases.favourites = Pn, P, Pg, PmP, P1, Pg, Sg, S, Sn, SmS

The list of favourites is used to assign shortcuts to. 1 is assigned to the first phase, 2 to the second and so on.

Note

Shortcuts are assigned only to the first 9 favourite phases. All other defined phases can be activated from the Picking menu.

../_images/phases-menu.png

Pick phase selection menu

To set the uncertainty of a pick a list of predefined uncertainties can be defined. Additionally uncertainties can be defined freely whereas choosing among a predefined set of uncertainties is a lot faster.

If the mouse hovers a pick a dashed rectangle is drawn around this pick. Then the pick is active and the right mouse button can be pressed to open the context menu where the polarity and uncertainty can be defined. The following screen shot shows the available uncertainties.

../_images/pick-context2.png

Pick context menu

They can be configured in scolv.cfg with:

# Define available pick uncertainty profiles. Single values
# are symmetric uncertainties whereas tuples are asymmetric
# uncertainties: (left,right). Uncertainty values are given
# in seconds.

# Define an uncertainty profile for local events
picker.uncertainties.profile.local = 0.05, 0.1, 0.2, 0.3, "(0.1,0.2)"

# Define an uncertainty profile for teleseismic events
picker.uncertainties.profile.teleseismic = 0.5, 1, 2, 3, "(1,2)"

# Define the list of uncertainty sets that are active in scolv.
# This first set in the list is used by default. The other sets
# can be activated in the settings dialog (scolv: F3)
picker.uncertainties.preferred = local, teleseismic

If an uncertainty is selected the active pick is copied into a manual pick and the uncertainty is displayed as semi transparent bar to the left and to the right of the pick. The width of the bar corresponds to the uncertainty in seconds.

../_images/pick-uncertainty.png

Furthermore the pick polarity can be defined.

../_images/pick-context.png

Either positive, negative, undecidable or unset. If set it is displayed as an arrow. Undecidable is displayed as a cross (X).

../_images/pick-polarity.png

To rotate the waveform components into ZNE or ZRT system a new drop down list was added in the toolbar. Selecting either ZNE or ZRT implies that all missing components are requested.

../_images/rotation-options.png

When waveforms are requested the corresponding widget background is changed according to the current state:

  • yellow: waveforms requested but not yet received

  • red: acquisition finished and data is not available

  • green: waveforms received and acquisition still in progress

../_images/picker-acqui.png

If a trace displays all three components and amplitudes are scaled up, they are not clipped to their window area. The clipping behaviour can be toggled by either pressing C or in the menu View ‣ Zoomtrace ‣ Clip components to viewport.

The difference is shown in the following two images:

../_images/clobber-off.png

Trace clipping enabled

../_images/clobber-on.png

Trace clipping disabled

Relocate events

Before relocating choose the locator, the locator profile and additional parameters to the right or from the the tool box. Additional locator routines are available by SeisComP plugins.

../_images/scolv-relocating.png

Pressing Relocate creates a new origin and updates the arrival table and the parameters displayed in the Location tab.

Compute magnitudes

When an event was relocated a new origin is created and new magnitudes can be calculated by using the “Compute Magnitudes” button. The advantage of calculating the magnitudes before committing the new origin, is the possibility to check the resulting magnitudes before they are computed manually by scmag.

../_images/tab_location_mag_status.png

Compute magnitudes status window

A window will pop up showing the progress information of computation. The amplitudes are either fetched from database if the pick is unchanged and already in the system. For new manual picks, waveforms are requested to compute the amplitudes. The popup window contains information about the progress and possible errors. After closing this windows all available magnitudes are shown and can be interactively re-processed in the magnitudes tab.

Commit a solution

Committing a solution means to send the location (including optional magnitudes) to the processing system and let it decide what origin becomes preferred.

To optimize the workflow

  1. select an event

  2. review solution

  3. commit solution

  4. change to event tab

  5. set this solution preferred

  6. set event type

  7. change to events tab

  8. goto 1.

to

  1. select an event

  2. review solution

  3. commit solution

  4. change to events tab

  5. goto 1.

an additional commit mode was added which allows to set certain options along with the location and its magnitudes.

../_images/commit-options.png

After pressing and holding the Commit button down for a little while, a menu pops up which allows to select With additional options. Selecting this entry brings up another window where the different options can be set.

../_images/commit-options2.png

It allows to fix the origin to be committed as preferred origin and to set the event type in one go. If Return to event list after commit is ticked the event list is activated after pressing OK to select another event quickly.

Earthquake name

Contains the event description earthquake name. If this field is empty the description will be removed from the event otherwise it will be added.

Comment

contains an optional event comment added as comment with ID Operator.

As a shortcut for committing with additional options, custom commit buttons can be added by configuration: Add, enable and configure a custom commit profile in olv.customCommits. With custom commit buttons origin and event paramters can be set, e.g.:

  • origin status

  • fixing the origin

  • event type

  • event type certainty

  • magnitude type of the preferred magnitude. The preferred magnitude can also be set in the magnitude tab.

  • event comments

../_images/commit-custom.png

Custom commit buttons in the Location tab for configured actions and with specific label and color.

Magnitudes tab

The Magnitude tab shows all available magnitude information for the current origin. They can be recomputed after creating a new origin, e.g. by relocating.

../_images/tab_magnitudes.png

Magnitudes tab of scolv.

(Map) Map with residual and status of the station magnitude, filled circles show stations which delivered a magnitude, empty circles represent for which no magnitude was calculated (Magnitude tabs) Each magnitude and the residuals are displayed in a separate tab, no residuals are displayed for deduced magnitudes like Mw(mB) or M (Information) Magnitude information including network magnitude value, magnitude error, number of used and available station magnitudes and minimum/maximum station magnitude (List) Station magnitude table with weights (Plot) Station magnitude residual from network magnitude (distance over residual) (Weighting) Weighting scheme for the network magnitude (B1) Recalculation of the network magnitudes (B2) Open waveform review

Station magnitudes

For each of the different magnitude types (e.g. mb, mB, MLv, Mw(mB)), the station magnitudes are shown in the magnitude residual plot and the table. The residual plot visualizes the difference between the station magnitude and the network magnitude for the different station distances. After relocation the magnitudes can be recalculated by the “Compute Magnitudes” button in the Location tab.

The station magnitudes can also be recalculated by interactive waveform analysis. Press the B2 button to start the interactive analysis.

Important

Magnitudes cannot be recalculated for origins loaded from database. To review magnitudes, create a new origin (relocate), recompute magnitudes and then change into this tab to open either the waveform review window or to just remove outliers.

Network magnitudes

Station magnitudes can be selected or unselected in the list and in the plot of station magnitudes for computating the corresponding network magntiude. The method and the margins to disregard outliers can be selected. Normally, the 25%-trimmed mean is calculated as network magnitude to stabilize the result against a few outliers.

Magnitudes that were not computed due to missing data or low signa-to-noise ratios have a cross button rendered in their tab headers and their value is nan (not a number). Furthermore was the status of the magnitude set to rejected. To manually review the waveforms and to fine tune the parameters, open the waveforms and add at least one station magnitude. Otherwise the rejected magnitude will be removed from the origin prio to committing it.

Summary magnitude

The summary magnitude typically is calculated from all network magnitudes by scmag and set as preferred magnitude type by scevent after committing or confirming an origin. The defaults can be changed by configuring scmag and scevent.

However, in combination with custom commit buttons, the network magnitude to be considered as the preferred can be set by hitting this configured button or interactively in the magnitude tab of scolv. Interactively check the box in the network magnitudes tab, then press the custom commit button. Setting the preferred magnitude interactively in the magnitude tab takes priority over the configuration of the custom commit button.

Waveform review

The magnitude review page also allows the review of waveforms. The button Waveforms brings up the amplitude waveform review page. The waveform review magnitude type is the same as the currently active tab.

../_images/magnitudes-waveforms.png

The initial view loads all traces of all arrivals within the defined distance for that magnitude type. The zoom trace shows all components required for this particular amplitude type and the lower part shows all stations and only the currently active component. All traces are aligned on trigger time (blue P marker). If a station has got an amplitude it shows up as a red (automatic determined amplitude) or green (manually determined amplitude) marker. This display is similar to the Picker.

The toolbar contains two lines of settings. The first line is similar to the Picker, the second line is amplitude picker specific.

../_images/magnitudes-toolbar.png

Second toolbar line: filter selection, filter toggle, min SNR editor, amplitude measurement type selector, amplitude combiner selector, (re)calculate amplitudes, apply amplitudes.

A station trace is divided into three areas:

  • dark gray: unused data

  • light gray: data used for noise offset and noise amplitude

  • white: data used for amplitude calculation

The example above shows nicely how different data time windows are used for amplitude determination depending on the distance. This depends on the amplitude type and its implementation.

Things that can be done:

  • show raw data

  • change processing settings

  • adjust processing areas (noise, signal) for a single trace or all traces

  • apply a secondary filter (e.g. to remove noise or low frequencies)

  • pick amplitudes within a user definable time window

  • add unpicked/unassociated stations that are within a certain distance

  • remove bad stations

Show raw data

By default the processed waveforms are displayed. To look at the raw waveforms change the filter drop down box to Raw.

Processing settings

A basic amplitude processor uses two basic settings: Minimum signal/noise ratio (SNR) and data time windows. The default minimum SNR is defined by the implementation of the amplitude algorithm. This default SNR is shown in the toolbar right from Min SNR:. In some situations an operator might want to increase or decrease the minimum SNR for some reason. This can be done by modifying the value in the corresponding spin box.

In the time scale of the zoom widget and the overview three black triangles are visible. Those triangles can be used to adjust the data time windows of either the zoom trace (upper part) or all traces (lower part) by dragging the handle with the left mouse button.

Some amplitude processors allow the modification of the type of amplitude measurement (e.g. absolute maximum or peak-to-peak) and/or the amplitude combiner procedure. This procedure is mostly used when a final amplitude from two components is computed, e.g. ML on the horizontals. The combiner procedure defines how the amplitudes of each horizontal are combined to a single amplitude, e.g. by taking the maximum of both or the average.

If the amplitude processor allows any of these options the corresponding drop down boxes are enabled in the toolbar and can be used to change the defaults.

Note

Amplitudes are not recalculated if any changes to the settings are made. Recalculation has to be activated manually (see below).

Secondary filters

Another option is to filter the data additionally to the internal filter of the amplitude processor. Be warned that wrongly applied filters screw up the results. The available filters can be defined in the settings dialog of scolv or in the configuration file similar to the manual picker filters:

# Define a list of available filters for amplitude picking in :confval:`amplitude.filters`.
# The format is "name1;filter-definition1", "name2;filter-definition2"
amplitudePicker.filters = "4 pole HP @2s;BW_HP(4,0.5)"

The new filter selection is applied immediately to the waveforms while the amplitudes are not recalculated (see next section).

Calculate amplitudes

To calculate the amplitudes of all traces with the current settings press the green check in the toolbar. It will process all traces and recalculate the amplitudes within the shown time windows. If an error occurs it will show up as a small message box in the station trace itself. If a new amplitude is available its state is set to manual and the marker is updated to reflect the new position of the amplitude. If the mouse hovers an amplitude marker a tooltip pops up after a certain amount of time and shows information about the amplitude.

../_images/amplitude-tooltip.png

Pick amplitudes

In addition to the default picking of all stations it is also possible to define the time window of the amplitude of a station manually. To do so, activate picking by pressing 1 or in the main menu: Amplitudes ‣ Pick amplitudes.

There are two modes of picking:

  1. create a time window by pressing with left mouse button at the start time and releasing at the end time, or

  2. double click at a time and use a time window of [t-0.5sec;t+0.5sec]

Add stations in range

Unpicked or unassociated stations can be added the same way as in the manual picker. The new stations will not have an amplitude and need either manual picking or global amplitude recalculation.

Remove bad stations

Stations can be disabled by either double clicking on the trace label in the overview or by deactivating an amplitude similar to deactivating a pick.

Confirm the amplitudes

The red button in the toolbar confirms all amplitudes and transfers them to the magnitude review page. Only activated amplitudes are transferred. Disabled stations or disabled amplitudes are ignored. At this stage all magnitudes are calculated and the network magnitude is calculated according to the available settings: Mean, Median or Trimmed mean.

Event tab

The Event tab gives all information of associated origins and magnitude of the actual event. Here the selection of the preferred origin and preferred magnitude can be influenced independent from scevent. The messaging between scevent and scolv about the selected origins and magnitudes can be viewed in a window that has to be opened by pulling the left side frame to the right.

../_images/tab_event.png

Event tab of scolv.

(Origin list) List of all associated origins (Magnitude list) List of magnitudes of the actual origin (B1) Selector for the event type (B2) Button to fix the selected origin as preferred (B3) Button to let scevent select the preferred origin (B4) Button to fix the selected magnitude as preferred (B5) Button to let scevent select the preferred magnitude

The map (lower left part) shows all associated origins while the currently selected origin (Origin list) is drawn filled.

Events tab

The Events tab gives an overview of the events in a defined time span. Shown events are updated in real time as new events arrive in SeisComP or are loaded from the database. When starting scolv with the option –ep events can also be loaded from an XML file using the File menu in the main window.

../_images/tab_events.png

scolv Events tab with the list of events and the filter window.

Information about origin time, preferred (“best”) magnitude, preferred magnitude type, number of phases, epicenter and depth, origin status, region, agency and event/origin ID are similar to the event list in scesv. Additionally, all origins associated with one event are displayed if an event item is expanded.

Note

The region name of an event is read from the database or received via the messaging bus. It is an integral part of the event description and set based on the data set available at the time of the event creation. The region name of the origins is not part of the origin description and resolved dynamically when the information is required. That can lead to confusion if the dataset of the computer where the event has been created and the local dataset differs. Therefore the region names resolved locally are rendered with italic font style.

Event filtering

Database requests filters can be set and adjusted in the filter parameter window which opens when pressing the Filter button. Press Read to reload the events list based on the filter parameters. Filter parameters are Global parameters parameters which can be preset by adjusting the configuration parameters eventlist.filter.database.*. The request filter only concerns the database request for loading events. It does not update the current list.

The event list also contains a checkbox Hide other/fake events. If checked all events with type not existing or other are hidden. If unchecked they are shown. ‘Pressing the Hide button affects the currently loaded list.

It is possible to configure the event types used for this filter as well as the label text of the checkbox.

# Define the event types to be filtered
eventlist.filter.types.blacklist = "not existing", "other",\
                                   "outside of network interest"

# Define the label of the button to filter the events
eventlist.filter.types.label = "Hide fake events"

# Define the default behaviour
eventlist.filter.types.enabled = true

Another option to filter events is by agencyID. The button Show only own events will hide all events where the preferred origins agencyID is not the configured agencyID of scolv. This is the default behaviour which can be customized.

# Set the preferred agencyIDs to GFZ and EMSC
eventlist.filter.agencies.whitelist = GFZ, EMSC

# Set type to 'origins' which means that an event will pass the filter if
# at least one origin is from a preferred agency defined with the whitelist
# above. The default type is 'events' which checks only the events preferred
# origin.
eventlist.filter.agencies.type = origins
eventlist.filter.agencies.label = "Show only my preferred events"

# Enable this filter initially. If this option is not used the filter
# is disabled by default.
eventlist.filter.agencies.enabled = true

Events table

As with the arrival table the shown columns of the list are also configurable. The available identifiers are:

  • OT(GMT)

  • Type

  • M

  • TP

  • Phases

  • RMS

  • Lat

  • Lon

  • Depth

  • Stat

  • FM

  • Agency

  • Author

  • Region

  • ID

The bold identifiers are visible initially. This list can also be customized with eventlist.visibleColumns

# Remove Type and Author from column list that is initially active
eventlist.visibleColumns = OT(GMT), M, TP, Phases, Lat, Lon,\
                           Depth, Stat, Agency, Region, ID

To show or hide columns interactively click with the right mouse button on the table header and check or uncheck the corresponding column.

Custom actions

Since the internal data model is limited, scolv allows addition of custom quantities derived from the origin objects to the information panel, to the origin list of Event tab and to the Event list. This can help to evaluate origins in a better way.

Two source are supported, origin comments and custom scripts.

Origin comments

Currently only one comment can be added to the different panels.

To add a comment value to the information panel of the Location tab, the following configuration can be used:

# Define the comment id to be used
display.origin.comment.id = SED.quality

# Define the default display value if no comment is available
display.origin.comment.default = "-"

# Define the label text in the information panel for this value
display.origin.comment.label = Quality

To add a custom column to the origin list of the Event tab using a comment value, the following configuration can be used:

# Define the default value if no comment is present
eventedit.customColumn.default = "-"

# Define the comment id to be used
eventedit.customColumn.originCommentID = SED.quality

# Define the column header label
eventedit.customColumn = "Qual"

# Define the column position in the table
eventedit.customColumn.pos = 4

# Allows to map comment values (strings) to colors. In this case the
# comment will have A,B,C or D which is mapped to green, yellow, orange and
# red
eventedit.customColumn.colors = "A:00FF00","B:rgb(64,192,0)",\
                                "C:rgb(192,64,0)","D:FF0000"

To add a custom column to the event list of the Events tab using a comment value, the following configuration can be used:

# Define the default value if no comment is present
eventlist.customColumn.default = "-"

# Define the comment id to be used
eventlist.customColumn.originCommentID = "SED.quality"

# Define the column header label
eventlist.customColumn = "Qual"

# Define the column position in the table
eventlist.customColumn.pos = 5

# Allows to map comment values (strings) to colors. In this case the
# comment will have A,B,C or D which is mapped to green, yellow, orange and
# red
eventlist.customColumn.colors = "A:00FF00","B:rgb(64,192,0)",\
                                "C:rgb(192,64,0)","D:FF0000"

The last three examples are used to show the SED.quality comment value which is set by the NonLinLoc locator plugin.

External scripts

scolv allows to add custom buttons to the summary window and the Location tab. When pressing the custom buttons, user-defined external scripts are executed. Configuration:

Another option to add derived origin parameters is to use external scripts. scolv will call those scripts and writes a binary serialized origin object to its standard input. scolv reads the script output and displays this value only if the return code of the script is 0.

An example script which just returns the standard error looks like this:

#!/usr/bin/env python
import seiscomp.datamodel, seiscomp.io

def main():
    ar = seiscomp.io.BinaryArchive()

    # Open standard input
    if not ar.open("-"):
        # Hmmm, opening stdin failed
        return 1

    # Read the object
    obj = ar.readObject()
    ar.close()

    # Try to cast obj to an origin
    org = seiscomp.datamodel.Origin.Cast(obj)

    # No origin -> error
    if not org:
        return 1

    # Try to print the standard error to stdout
    try: print org.quality().standardError()
    # Field not set, return error
    except: return 1

    return 0

 if __name__ == "__main__":
     sys.exit(main())

Important

The script must be executable. In Linux don’t forget to call

chmod +x /path/to/script

As many scripts as necessary to evaluate can be created.

Warning

Calling external scripts causes overhead and can take some time depending on the implementation of the script. scolv needs to access the database to fetch additional information which it does not need normally. The slower the database access, the longer it takes to display the results.

To add the output to the information panel of the Location tab, the following configuration can be used:

# Define the available add-ons to be used
display.origin.addons = qual1, qual2

# Configure each add-on
display.origin.addon.qual1.label = "Qual1"
display.origin.addon.qual1.script = "@CONFIGDIR@/scripts/scolv/qual1"

display.origin.addon.qual2.label = "Qual2"
display.origin.addon.qual2.script = "@CONFIGDIR@/scripts/scolv/qual2"

The same can be done for the origin list of the Event tab

eventedit.scripts.columns = qual1, qual2
eventedit.scripts.column.qual1.label = "Qual1"
eventedit.scripts.column.qual1.pos = 8
eventedit.scripts.column.qual1.script = "@CONFIGDIR@/scripts/scolv/qual1"
eventedit.scripts.column.qual2.label = "Qual2"
eventedit.scripts.column.qual2.pos = 9
eventedit.scripts.column.qual2.script = "@CONFIGDIR@/scripts/scolv/qual2"

and for the event list of the Events tab

eventlist.scripts.columns = qual1, qual2
eventlist.scripts.column.qual1.label = "Qual1"
eventlist.scripts.column.qual1.pos = 5
eventlist.scripts.column.qual1.script = "@CONFIGDIR@/scripts/scolv/qual1"
eventlist.scripts.column.qual2.label = "Qual2"
eventlist.scripts.column.qual2.pos = 6
eventlist.scripts.column.qual2.script = "@CONFIGDIR@/scripts/scolv/qual2"

Adding external scripts to the event list is the most expensive part. Whenever the event list is reloaded, it will start to run the scripts on all origins in the background. It can take a while until the complete list has been processed. A progress indicator is plotted in the middle of the event list while the background processes are running.

Settings

All settings of scolv can be adjusted in its configuration file. However, some settings can be changed on-the-fly. The connection to the messaging system and the database can be adjusted in the Setup connection dialog access by pressing F2. A window for adjusting scolv settings is available which can be opened by pressing F3.

Global

This section contains settings for all the main tabs and all waveform windows.

../_images/settings-global.png

Global settings

Reduction velocity

Sets the reduction velocity used for plot MoveOut.

Compute magnitudes after relocate

Automatically computes magnitudes after each relocation. This has the same effect as pressing “Compute magnitudes” manually.

Compute magnitudes silently

Automatically closes the compute magnitudes dialog if the computation is finished and no error occurred.

Draw grid lines

Enables dashed grid lines in all plots.

Data source

Defines the waveform data source for both, pick review and amplitude review

Default distance for “add station”

The default value to add stations (traces) that have not been picked or associated is 15 degrees. A lower value can be defined, e.g. if mainly local events are analyzed.

Hide station traces without data

If new stations are added during pick review or amplitude review and if no data is available for some of those stations, they will be hidden and not shown. Once data arrives the trace becomes visible.

Picker

This section contains settings for the picker window.

../_images/settings-picker.png

Waveform picker settings

Show cross hair cursor

Enables the cross hair cursor which shows the currently selected uncertainty ranges.

Uncertainties

Select the current uncertainty set to be used (picker.uncertainties.preferred).

Remove automatic station picks

If checked all automatic picks of a station with manual picks are removed once the manual review is confirmed.

Remove all automatic picks

If checked all automatic picks are removed once the manual review is confirmed.

Magnitude review

This section contains settings for the magnitude waveform review window.

../_images/settings-amplitude.png

Amplitude/magnitude review settings

Waveform time window pre offset

Sets an offset before the used amplitude time window that is used when collecting data.

Waveform time window post offset

Sets an offset after the used amplitude time window that is used when collecting data.

The greater the offset the more the amplitude time window can be extended or shifted.

Units and precisions

Local network users prefer the distance unit in kilometres while others prefer degrees. scolv (as any other GUI) can be configured to show either the one or the other.

# If true, show distances in km. Use degree otherwise.
scheme.unit.distanceInKM = true

Furthermore the precision of various values can be configured:

# Precision of depth values.
scheme.precision.depth = 0
# Precision of latitude/longitude values.
scheme.precision.location = 2
# Precision of magnitude values.
scheme.precision.magnitude = 2
# Precision of pick times (fractions of seconds).
scheme.precision.pickTime = 1

Note

Configuring units and precisions only affects the way the values are presented, not the values themselves. These and other lock-and-feel parameters can be adjusted in scheme section of the global configuration.

Hotkeys

The following table describes the available key combinations and their triggered actions in scolv.

Shortcut

Description

Main window

F2

Setup connection dialog

F3

Picker and amplitude settings dialog

F8

Display left event summary panel

F9

Show ray paths and associated stations

F10

Show event list

F11

Toggle fullscreen

Ctrl+N

Create an unassociated artificial origin at the current map center

Ctrl+Z

Go back to last origin (if available)

Ctrl+Shift+Z

Go to next origin (if available)

Mouse wheel

Zoom map in/out

Double click

Center map at the clicked position

Picker

1 .. 9

Activate configured phase picking

Space

If phase picking is enabled, set pick

Esc

Leaving picking mode

F3

Add station

F5

Relocate

E

Switch to E-component

F

Toggle filter

N

Switch to N-component

S

Maximize visible amplitudes

T

Temporarily toggle 3 component view in picking trace

W

Reset scale in picking trace

Y

Decrease row height of trace list

Z

Switch to Z-component

>

Increase time scale in trace overview

<

Decrease time scale in trace overview

Left

Move trace view to left (fine)

Right

Move trace view to right (fine)

Shift+Left

Move trace view to left (rough)

Shift+Right

Move trace view to left (rough)

Shift+F

Toggle filter but limits to the selected trace

Shift+S

Toggle spectrogram of selected trace

Shift+Y

Increase row height of trace list

Up

Scroll up (through the traces)

Down

Scroll down (through the traces)

Ctrl+S

Show Fourier spectrum of selected trace

Ctrl+F

Show spectrum of current trace

Ctrl+N

Default trace view

Ctrl+T

Toggle display of theoretical arrivals

Ctrl+P

Toggle display of picks (not arrivals). If picks should be shown for the first, all picks within the time span of interest are loaded from database. The behaviour is the same as ticking the option “Load all picks”.

Ctrl+Up

Amplitude zoom in

Ctrl+Down

Amplitude zoom out

Ctrl+Right

Time zoom in

Ctrl+Left

Time zoom out

Ctrl+0

Align by origin time

Ctrl+[1..9]

Align on 1st-9th favorite phase

Ctrl+Shift+[1..9]

Align on theoretical onset of 1st-9th favorite phase

Ctrl+F1

Align on P arrival

Ctrl+F2

Align on S arrival

Ctrl+WheelUp

Amplitude zoom in

Ctrl+WheelDown

Amplitude zoom out

Shift+WheelUp

Time zoom in

Shift+WheelDown

Time zoom out

Ctrl+Shift+WheelUp

Time and amplitude zoom in

Ctrl+Shift+WheelDown

Time and amplitude zoom out

Alt+Right

Jump to next marker (picking mode)

Alt+Left

Jump to previous marker (picking mode)

Alt+D

Sort by distance

Alt+R

Sort by residual

Configuration

etc/defaults/global.cfg
etc/defaults/scolv.cfg
etc/global.cfg
etc/scolv.cfg
~/.seiscomp/global.cfg
~/.seiscomp/scolv.cfg

scolv inherits global options.

loadEventDB

Type: double

Unit: days

Number of days to preload if scolv is started. Default is 1.

magnitudes

Type: list:string

Configures the list of magnitude types to be calculated when recomputing magnitudes. This list can be altered interactivly so this reflects only the default unless computeMagnitudesSilently is set to true. Default is MLv,mb,mB,Mwp.

visibleMagnitudes

Type: list:string

A list of magnitude types to be displayed in the summary widget (F8). Default is M,MLv,mb,mB,Mw(mB).

button0

Type: string

Label of button that triggers user defined script0.

button1

Type: string

Label of button that triggers user defined script1.

scripts.export

Type: string

User defined script which enables a publish button in the summary panel on the left side of scolv (activated with F8).

scripts.script0

Type: string

Full path to the script executed when hitting the button labeled with button0.

scripts.script1

Type: string

Full path to the script executed when hitting the button labeled with button1.

scripts.export.silentTerminate

Type: string

If the publish button is clicked while another script is still running, a message box pops up with a warning that a script is still running and to option to terminate it. If this flag is true then it will be terminated automatically without user interaction and the warning message. Default is false.

olv.defaultEventType

Type: string

Sets the default event type to be used when confirming a solution. If not set, the event type is not changed at all unless "with options" is used. The origin or its source must be associated with an event already.

olv.commonEventTypes

Type: list:string

A list of event types which are commonly set. This defines a priority list which will be displayed on top of the event type selection menu. Additionally the remaining (non-prioritized) types are displayed with less contrast. The order is preserved in the event editor as well as in the drop-down list of the "Commit with additional options" dialog.

olv.defaultMagnitudeAggregation

Type: string

Sets the default magnitude aggregation method. It can be either "mean", "trimmed mean" or "median". If not set the default behaviour is used which computes the mean if less than 4 stations are available, trimmed mean otherwise.

olv.computeMagnitudesAfterRelocate

Type: boolean

Automatically starts computation of magnitudes after relocating an origin. Default is false.

olv.computeMagnitudesSilently

Type: boolean

Starts magnitude computation without user interaction if everything runs without errors. In case of errors a window pops up with the current state of processing. Default is false.

olv.enableMagnitudeSelection

Type: boolean

If enabled a magnitude selection pop window will open in advance to compute magnitudes. The default selection reflects the configuration parameter "magnitudes". Default is true.

olv.Pvel

Type: double

Unit: km/s

The P reduction velocity used in the "move out" plot. Default is 6.0.

olv.drawMapLines

Type: boolean

Sets the drawing of lines in the map connecting the station with the event. Default is true.

olv.drawGridLines

Type: boolean

Sets the drawing of grid lines in the plot. Default is true.

olv.computeMissingTakeOffAngles

Type: boolean

If a locator does not populate the take off angle in its arrivals the first motion plot will not show picked polarities. This option defines whether to compute take off angles that are not present in the arrivals or not. Default is true.

olv.defaultAddStationsDistance

Type: double

Unit: deg

The default value for adding unassociated stations in the picker. Default is 15.

olv.hideStationsWithoutData

Type: boolean

If enabled then all traces without data are hidden in the picker. Default is false.

olv.hideDisabledStations

Type: boolean

If enabled then all traces of disabled stations are hidden if they are not picked. Default is false.

olv.defaultDepth

Type: double

Unit: km

When creating an artificial origin this is the default depth used. Default is 10.

olv.artificialOriginAdvanced

Type: boolean

Adds advanced input parameters in artificial origin dialog. Default is false.

olv.systemTray

Type: boolean

Adds an icon to the system tray and displays a message when a new event was received. Note that this feature requires libQt4 version 4.3 or higher. Default is true.

olv.map.stations.unassociatedMaxDist

Type: double

Unit: deg

Maximum distance in degrees up to which also unassociated stations are shown in the map. The default value is 360 which will show all unassociated stations. Default is 360.

olv.map.event.defaultRadius

Type: double

Unit: deg

Default map radius in degrees if a new event is selected. A negative value restores the default behaviour. Default is -1.

olv.arrivalTable.visibleColumns

Type: list:string

Defines the visible columns in the arrival table. Valid tokens are: Used, Status, Phase, Weight, Method, Polarity, Takeoff, Net, Sta, Loc/Cha, Timeres, Dis, Az, Time, +/-, Slo, Slores, Baz, Bazres, Created, Latency

olv.locator.interface

Type: string

The default locator interface to use. Default is LOCSAT.

olv.locator.defaultProfile

Type: string

The default locator profile to use.

olv.locator.minimumDepth

Type: double

Unit: km

Minimum depth which is set if the locator used supports fixing the depth. If the depth is lower than this value the depth is then fixed to this configured value and the origin is relocated again.

olv.commit.forceEventAssociation

Type: boolean

Activates the button "Force association with event" when committing with additional options. This is just the default setting and can be changed manually when the dialog pops up. Default is true.

olv.commit.fixOrigin

Type: boolean

Activates the button "Fix this origin as preferred solution" when committing with additional options. This is just the default setting and can be changed manually when the dialog pops up. Default is true.

olv.commit.returnToEventList

Type: boolean

Whether to return to the event list after committing with additional options or not. Default is true.

olv.commit.eventCommentOptions

Type: list:string

Turns the event comment input field into a drop down box allowing the user to select from a list a predefined comment values which may be changed if required.

Note

olv.customCommits.* Configure custom commit buttons which behave like shortcuts to “Commit with additional options”. Pressing a custom button does not open a popup window. Instead it reads the configured profile and applies the options to the event and origin. Each commit button can be coloured and labeled.

Note

olv.customCommits.$name.* $name is a placeholder for the name to be used.

olv.customCommits.\$name.enable

Type: boolean

Enable this commit button. Default is true.

olv.customCommits.\$name.askForConfirmation

Type: boolean

Ask for confirmation by presenting the "commit with options" dialog with the options pre-populated from this configuration. Cancelling the dialog aborts the commit procedure. Default is false.

olv.customCommits.\$name.forceEventAssociation

Type: boolean

Associate a new origin to the currently active event or not. Default is false.

olv.customCommits.\$name.fixOrigin

Type: boolean

Fix the origin as preferred solution in the event it is associated to. Default is false.

olv.customCommits.\$name.eventType

Type: string

The event type to be set of the event associated with the committed origin. If unset, the type remains unchanged. Use quotes for event types with spaces, e.g. "not existing".

olv.customCommits.\$name.eventTypeCertainty

Type: string

The event type certainty to be set of the event associated with the committed origin. If unset, the type certainty remains unchanged.

olv.customCommits.\$name.originStatus

Type: string

The status to be set of the origin being committed. If unset, the status remains unchanged. If empty, the origin status will be set to none.

olv.customCommits.\$name.magnitudeType

Type: string

Sets the preferred magnitude type of the event. If unset, no changes will be requested. If empty, the currently fixed preferred magnitude type will be reset.

olv.customCommits.\$name.eventName

Type: string

Optional event name which will be set. This option exists for completeness and does not make much sense to be applied on any event. Use quotes for event names with spaces, e.g. "Quarry XYZ".

olv.customCommits.\$name.eventComment

Type: string

Optional event comment which will be set. Use quotes for event comments with spaces, e.g. "Blast on Monday morning".

olv.customCommits.\$name.returnToEventList

Type: boolean

Return to the event list after committing or not. Default is false.

olv.customCommits.\$name.label

Type: string

The commit button label. Use quotes for labels with spaces, e.g. "Earthquake reported". Default is Commit+.

olv.customCommits.\$name.color

Type: color

Optional primary color for the bulk commit button. Use hexadecimal values.

olv.customCommits.\$name.colorText

Type: color

Optional text color for the bulk commit button. Use hexadecimal values.

olv.customCommits.\$name.tooltip

Type: boolean

Add a summary of the actions to the button’s tooltip. Default is false.

Note

picker.* Parameters controlling the phase picker window.

picker.showCrossHairCursor

Type: boolean

Activates a cross hair cursor showing the configured uncertainties when in picking mode. Default is false.

picker.ignoreUnconfiguredStations

Type: boolean

If enabled the picker will not add stations that are not configured with a detecStream. Default is false.

picker.loadAllComponents

Type: boolean

Loads all three components by default. If disabled then additional components are fetched when requested. Default is true.

picker.loadAllPicks

Type: boolean

Loads all existing picks for the requested data time window. Default is true.

picker.loadStrongMotion

Type: boolean

If enabled then acceleration data is loaded for co-located stations where picked on velocity data. Default is false.

picker.showAllComponents

Type: boolean

If enabled then all three components are shown in the picker zoom trace. Default is false.

picker.allComponentsMaximumDistance

Type: double

Unit: deg

Defines the distance limit for the showAllComponents flag. Default is 10.

picker.usePerStreamTimeWindows

Type: boolean

If enabled data is requested around the P pick for each stations. Otherwise origin time is used and the time window for all stations is the same. Default is false.

picker.removeAutomaticPicksFromStationAfterManualReview

Type: boolean

After picking and pushing the solution back to scolv all automatic arrivals are removed from a station if a manual pick exists. Default is false.

picker.removeAllAutomaticPicksAfterManualReview

Type: boolean

After picking and pushing the solution back to scolv all automatic arrivals are removed from all stations regardless if a manual pick exists or not. Default is false.

picker.preOffset

Type: int

Unit: s

The data time span added to the left of either origin time or first arrival depending on the usePerStreamTimeWindows flag. Default is 60.

picker.postOffset

Type: int

Unit: s

The data time span added to the right of the requested time window. Default is 120.

picker.minimumTimeWindow

Type: int

Unit: s

Minimum data time window length. Default is 1800.

picker.alignmentPosition

Type: double

Unit: s

Defines the relative position of the alignment when traces are aligned at a phase. This value is bound to interval [0:1] where 0 is the left side and 1 is right side of the trace window. Default is 0.5.

picker.uncertainties

Type: list:string

Unit: s

Defines a list of predefined uncategorised uncertainties. The format of each list item is either a double value or a pair of double values for asymmetric uncertainties in format "(val1,val2)". This parameter is only used if picker.uncertainties.preferred has not been defined.

picker.phases

Type: list:string

A list of phases that is available for picking in the Picking menu. This is a fallback for the more complex phase group definition "picker.phases.groups" which is not part of this module description. The phases are not accessible through hot keys as for "picker.phases.favorites".

picker.showPhases

Type: list:string

Phases for which the theoretical arrival times are shown.

picker.filters

Type: list:string

List of filters available in the picker.

picker.velocityChannelCodes

Type: list:string

A list of channel codes to be used when searching for velocity channels. Usually this information is part of the meta data. In case it is not, this list is used.

picker.accelerationChannelCodes

Type: list:string

A list of channel codes to be used when searching for acceleration channels. Usually this information is part of the meta data. In case it is not, this list is used.

picker.uncertainties.preferred

Type: list:string

Unit: s

Defines a list of preferred pick uncertainty profiles.

Note

picker.uncertainties.profile.$name.* $name is a placeholder for the name to be used and needs to be added to picker.uncertainties.preferred to become active.

picker.uncertainties.preferred = a,b
picker.uncertainties.profile.a = ...
picker.uncertainties.profile.b = ...
# c is not active because it has not been added
# to the list of picker.uncertainties.preferred
picker.uncertainties.profile.c = ...
picker.uncertainties.profile.\$name

Type: list:string

Unit: s

Defines a list of pick uncertainties. The format of each list item is either a double value or a pair of double values for asymmetric uncertainties in format "(val1,val2)".

picker.phases.favourites

Type: list:string

Phase types available for rapid picking by hot keys and in the Picking menu. Make sure, the locator can handle all phases. Separate phase types by comma.

Note

picker.integration.* Settings related to waveform integration which may be required if the desired waveform unit is changed and the sensor data must be integrated once or multiple times.

picker.integration.preFilter

Type: string

An optional pre-filter which is applied prior to the numerical integration to stabilize the result. This filter is applied for each integration step or just once depending on the parameter "applyOnce". Multiple integrations are necessary if acceleration data should be converted to displacement.

picker.integration.applyOnce

Type: boolean

Whether to apply the pre-filter only prior the first integration step or prior to each step. Default is true.

Note

amplitudePicker.* Parameters controlling the amplitude picker window for computing station magnitudes.

amplitudePicker.preOffset

Type: int

Unit: s

Time span in seconds to be added to the left of the used amplitude time window. Default is 300.

amplitudePicker.postOffset

Type: int

Unit: s

Time span in seconds to be added to the right of the used amplitude time window. Default is 300.

amplitudePicker.filters

Type: list:string

A list of filters used for the amplitude picker.

display.origin.addons

Type: list:string

display.origin.comment.id

Type: string

display.origin.comment.default

Type: string

display.origin.comment.label

Type: string

Note

display.origin.addon.$name.* $name is a placeholder for the name to be used and needs to be added to display.origin.addons to become active.

display.origin.addons = a,b
display.origin.addon.a.value1 = ...
display.origin.addon.b.value1 = ...
# c is not active because it has not been added
# to the list of display.origin.addons
display.origin.addon.c.value1 = ...
display.origin.addon.\$name.label

Type: string

Defines the label text of the information panel in the Location tab of the parameter evaluated by this addon.

display.origin.addon.\$name.script

Type: string

Path to script to execute.

Command-line

Generic

-h, --help

show help message.

-V, --version

show version information

--config-file arg

Use alternative configuration file. When this option is used the loading of all stages is disabled. Only the given configuration file is parsed and used. To use another name for the configuration create a symbolic link of the application or copy it, eg scautopick -> scautopick2.

--plugins arg

Load given plugins.

-D, --daemon

Run as daemon. This means the application will fork itself and doesn’t need to be started with &.

--auto-shutdown arg

Enable/disable self-shutdown because a master module shutdown. This only works when messaging is enabled and the master module sends a shutdown message (enabled with --start-stop-msg for the master module).

--shutdown-master-module arg

Sets the name of the master-module used for auto-shutdown. This is the application name of the module actually started. If symlinks are used then it is the name of the symlinked application.

--shutdown-master-username arg

Sets the name of the master-username of the messaging used for auto-shutdown. If "shutdown-master-module" is given as well this parameter is ignored.

Verbosity

--verbosity arg

Verbosity level [0..4]. 0:quiet, 1:error, 2:warning, 3:info, 4:debug

-v, --v

Increase verbosity level (may be repeated, eg. -vv)

-q, --quiet

Quiet mode: no logging output

--component arg

Limits the logging to a certain component. This option can be given more than once.

-s, --syslog

Use syslog logging back end. The output usually goes to /var/lib/messages.

-l, --lockfile arg

Path to lock file.

--console arg

Send log output to stdout.

--debug

Debug mode: --verbosity=4 --console=1

--log-file arg

Use alternative log file.

Messaging

-u, --user arg

Overrides configuration parameter connection.username.

-H, --host arg

Overrides configuration parameter connection.server.

-t, --timeout arg

Overrides configuration parameter connection.timeout.

-g, --primary-group arg

Overrides configuration parameter connection.primaryGroup.

-S, --subscribe-group arg

A group to subscribe to. This option can be given more than once.

--content-type arg

Overrides configuration parameter connection.contentType.

--start-stop-msg arg

Sets sending of a start- and a stop message.

Database

--db-driver-list

List all supported database drivers.

-d, --database arg

The database connection string, format: service://user:pwd@host/database. "service" is the name of the database driver which can be queried with "--db-driver-list".

--config-module arg

The configmodule to use.

--inventory-db arg

Load the inventory from the given database or file, format: [service://]location

--db-disable

Do not use the database at all

Records

--record-driver-list

List all supported record stream drivers

-I, --record-url arg

The recordstream source URL, format: [service://]location[#type]. "service" is the name of the recordstream driver which can be queried with "--record-driver-list". If "service" is not given "file://" is used.

--record-file arg

Specify a file as record source.

--record-type arg

Specify a type for the records being read.