Q: How to set the minimum number of phases required to perform an automatic location?
A: First, you should know that this number cannot been set to a value lower than 6. It is hardcoded in the software. By default, SC3 is configured with a default value of 8. You can lower this value by doing the following modifications:
$HOME/.seiscomp3/scevent.cfg
# replacing 8 with the desired value eventAssociation.minimumDefiningPhases = 8
$HOME/.seiscomp3/scautoloc.cfg
# replacing 8 with the desired value autoloc.minPhaseCount = 8
$HOME/seiscomp3/trunk/share/autoloc/grid.conf: Change the last value of the lines related to the desired region, the format is as follows: Latitude, Longitude, Depth, diameter, maximum station distance, minimum pick count Note: Diameter means it is sensitive to events within x° of the center.
