The Parker cluster is named for Parker Butte on the outskirts of
Yerington in western Nevada, U.S.A. The cluster is motivated by the 5.8
Mw Parker Butte earthquake on December 9, 2024, which occurred a short
distance northeast of the butte. About half the events in the cluster
are associated with this mainshock, including several apparent
foreshocks. No other earthquake in the cluster exceeds 4.1 in magnitude
and most events are recorded only to near-regional distances. Despite
that, the seismograph network in this area is quite dense and the
location calibration is very robust. A free depth relocation is possible
and many events are held fixed at those depths for the final runs, but
some events with very near-source observations (less than 5 km
epicentral distance) required manual adjustment to match the closest
observations.
