Hi Angel,

The best way to locate local events is with a distribution of 1 Hz
geophones within and around the region of interest.  For events
outside of the array, the location accuracy deteriorates
quickly.

A 1-km array could be used to get the phase velocity and
azimuth of approach of seismic signals, but would not, 
in my opinion, be the first choice for locating regional
events.  The sample rate would need to be quite high as
would the relative timing accuracy.

Cheers,
JCLahr



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