December 4, 2012 – CALIFORNIA– An energetic earthquake swarm centered beneath rhyolite domes in the Coso Volcanic Field (CA) continues, with over 20 earthquakes ranging between M1 and M3 so far today. Many smaller events (hundreds) are recorded as well. The swarm initiated on 27 November and has included earthquakes as large as M3.7. The Coso Volcanic Field is located in Inyo County, California, at the western edge of the Basin and Range geologic province and northern region of the Mojave Desert. The Coso Volcanic Field is one of the most seismically active regions in the United States, producing dozens of tremors in the M1 and M2 range each week. Tremors in the M3 range occur at a rate of 2-6 per month and M4 quakes occur two-three times each year. Recent activity in the M5 range happened in 1996 and 1998 when tremors of M5.3, M5.1, M5.2, and…