A sequence of greater than 100 earthquakes has hit Northern California, shaking up the Geysers geothermal steam area in Sonoma and Lake counties.
Since Thursday, at the very least 131 earthquakes have been recorded — as small as magnitude 0.2 and as large as magnitude 4. The most important earthquake was recorded at 5:48 a.m. Thursday, with an epicenter 10 miles east of Cloverdale, 20 miles northwest of Calistoga and 26 miles north of Santa Rosa.
Small earthquakes are frequent within the Geysers geothermal steam area. The Geysers-Clear Lake space is certainly one of California’s eight volcanic areas, and the Geysers steam area — on the southwest space of the volcanic area — is house to one of many world’s most efficient geothermal energy amenities, in line with the U.S. Geological Survey.
Energy is produced utilizing the steam generated from the volcanic area. Regardless of its identify, no geysers exist within the Geysers-Clear Lake space, the USGS says. The Geysers present electrical energy to Sonoma, Mendocino, Lake, Marin and Napa counties, the company says, and energy has been generated from the realm since 1960.
Northern California’s biggest seismic hazard are on faults, such because the San Andreas and Healdsburg-Rodgers Creek faults, that are miles away from this geothermal area, in line with the USGS.
“Actions related to the withdrawal of steam for producing electrical energy trigger or induce small quakes to happen within the area,” the company says.
One doable motive for that, the USGS says, is that taking away steam and warmth from the steam area can “trigger the encompassing rock to contract, which in flip can induce earthquakes because of the contractional stresses.”
Additionally, reclaimed chilly water from Santa Rosa and Lake County is pumped to the Geysers, and the interplay with scorching rock seems to be “a big consider inducing the earthquakes,” the company says.
The USGS says that the most important quake to ever hit the Geysers space was a few magnitude 4.5.
“It’s doable {that a} magnitude 5 may happen, however bigger earthquakes are considered unlikely. To ensure that a bigger earthquake to happen, it’s obligatory that a big fault exist,” the USGS says, and “on the Geysers, no such steady fault is thought to exist.”
