iFocalMechanism

First release (Mac version) June 2020, v0.9.4

Download Mac version (6.0 Mb zipped)

Program for exploring individual first-motion earthquake focal mechanisms. The main point of this is to allow a user to interactively explore how changing parameters affects how well a collection of first-motion polarity picks are fit. Picks in FocalMech format can be input, or picks can be added by hand. If a velocity model is input along with stations distances from the event (by hand), user can also explore the effect of error in event depth on focal mechanisms. A misfit value is calculated that downweights stations near a nodal plane (the width of the downweighting can be controlled by the user).

Known bugs: Some rotations by hand will produce peculiar reversals in mechanism polarity and a few combinations will produce some incorrect results.


Please send mail to cjones@colorado.edu if you encounter any problems or have suggestions.

C. H. Jones | CIRES | Dept. of Geological Sciences | Univ. of Colorado at Boulder

Last modified at June 29, 2020 6:50 PM