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US Series of quakes shake area near geothermal field in Northern California

09:36  10 may  2018
09:36  10 may  2018 Source:   latimes.com

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A series of small earthquakes has rattled an area northeast of Mount St. Helens in southwest Washington state. Small quakes shake Southern, Northern California communities. Separate studies offer evidence of geothermal plant causing Pohang earthquake. April 27, 2018.

The Geysers Geothermal Field is located in a tectonically active region of Northern California . The Geysers-Clear Lake geothermal area , California - an updated geophysical perspective of heat sources; 1995; Article A geothermal power plant at The Geysers near Santa Rosa, California .

a close up of a map © USGS

A magnitude 4.2 earthquake struck about 3 miles northwest of the Geysers geothermal field Wednesday evening and was followed by a series of aftershocks, the U.S. Geological Survey said.

The quakes were reported between 7:58 and 9:04 p.m., according to the USGS. The first was followed by several aftershocks with magnitudes of 4.0, 2.7, 2.7, 2.5 and 2.6.

The first earthquake was felt from Lakeport down to Sonoma and San Francisco, and even as far south as Santa Cruz, according to the USGS. The strongest shaking — Intensity Level 5 — was reported in Geyserville, just south of the epicenter.

Most other areas surrounding the quake felt “weak” shaking, classified as Intensity Level 3. As of 9:50 p.m., the USGS had recorded 200 responses from web users reporting what they felt.

6.0-magnitude quake hits off Papua New Guinea coast

  6.0-magnitude quake hits off Papua New Guinea coast A powerful 6.0-magnitude earthquake hit in waters off the island of New Britain in Papua New Guinea Wednesday, US seismologists said, but there was no immediate tsunami warning or reports of damage. The quake struck at a depth of 10 kilometres (6 miles) some 190 kilometres south of the New Britain town of Rabaul at 5:57 pm local time (0757 GMT), the US Geological Survey said.PNG sits on the so-called Pacific Ring of Fire, a hotspot for seismic activity due to friction between tectonic plates.The country is still recovering after a 7.

A magnitude 4.2 earthquake centered at a geothermal field near Clear Lake in Northern California on Tuesday highlights the increased seismic activity that has occurred since officials began generating electric power from steam heated by magma underneath the area .

Traffic Map. Weather. Hanging Series + Podcast. The Geysers is a large geothermal field where steam is withdrawn to generate electricity. And late Tuesday, a 3.9 magnitude quake struck in Mono County near the Mammoth Mountain ski resort.

The Geysers region, about 90 miles north of San Francisco, is one of the most seismically active regions in the United States.

Geothermal plants operate as close as 2 miles from the mountain community of Anderson Springs, near the epicenter of the quakes. The USGS says the work associated with the withdrawal of steam for producing electric power can trigger small quakes.

The series of earthquakes come a day after a magnitude 4.5 quake shook a large portion of Southern California and was felt from San Diego to Santa Clarita.

Tuesday's earthquake struck at 4:49 a.m. about seven miles north of Cabazon and 85 miles east of downtown Los Angeles. The epicenter was close to the San Gorgonio Pass, through which Interstate 10 connects Palm Springs and San Bernardino.

alene.tchekmedyian@latimes.com

Twitter: @AleneTchek

UPDATES:

10:05 p.m.: This post was updated with additional information about what people felt.

This post was originally published at 9:30 p.m.

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