By California Volcano Observatory
February 3, 2020
At 10:36:54 PST (18:36:54 UTC on) 1 February, a M4.4 earthquake occurred under McGee Mountain near Toms Place, CA, at a depth of 10 km.
M4.4 "Sierra Block" earthquake west of Mammoth Lakes
Sources/Usage: Public Domain.
This area, sometimes referred to as the "Sierra Block" commonly produces earthquakes in the range of M3 with a M4+ every few years. These earthquakes are generally unrelated to volcanic activity, and the alert level at all Long Valley Volcanic Center volcanoes remains at Normal/Green. The current earthquake poses no immediate hazard, but aftershocks like the M3.1 that occurred shortly after at 10:55:36 PST (18:55:36 UTC) may still occur.