Dear colleagues,
Here is an interesting summary of a study in Oklahoma that used over 1800 geophones to accurately record the radiation pattern of earthquake ground motions in different frequency bandwidths – it’s good to know that these observations closely mimic seismological theory!
https://www.miragenews.com/seismic-shockwave-pattern-may-be-redirecting-674710/
Cheers,
Trev