CLOVERDALE (BCN) — The U.S. Geological Survey reported an earthquake with a preliminary magnitude of 2.7 struck early Saturday morning in Sonoma County.
The quake shook an area near The Geysers at 12:59 a.m., according to the USGS, It had a depth of 1.2 miles and an epicenter located 12 miles east of Cloverdale.
In the past seven days, 32 earthquakes of magnitude 2.0 or larger have occurred around The Geysers, with six of those occurring within the past 24 hours.
The Geysers is the largest single geothermal field in the world, according to the U.S. Department of Energy, and the region experiences constant seismic events between 0.5 and 3.0 on the Richter scale.
Deep-well injection at the site, which the Department of Energy says is necessary for the extended and sustained production of geothermal resources at the site, is believed to fuel the region’s seismicity.
The largest event recorded in The Geysers field was a magnitude 4.6 quake in 1973, according to the Department of Energy.
There are 22 active geothermal plants in the region that produce roughly 950 megawatts of power, or enough for about 950,000 homes.