Did You Feel the Quake?

Epicenter of 2.5 temblor was northwest of Santa Rosa on Sunday morning.

By Bay City News Service

A small earthquake with a preliminary magnitude of 2.5 struck Sunday morning in near The Geysers geothermal complex in the mountains between Santa Rosa and northern Napa Valley, according to the U.S. Geological Survey.

The quake struck at 10:24 a.m. at a depth of about one mile, according to the USGS. The epicenter was about two miles southeast of The Geysers and seven miles northwest of Santa Rosa and five miles southwest of Calistoga in an area where deep-well injection produces microseismic events regularly. 

There is a cluster of geothermal power plants at The Geysers up in the lightly populated Mayacamas Mountains. The plants provide electricity to Sonoma, Mendocino, Lake, Marin and Napa counties.

Did you get rocked by this shaker? Tell us in the comments.

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Belle (Orchid Lady) February 25, 2013 at 10:56 PM
Hmmm, I know that geysers produce activity, and based on their size and depths, seismic activity varies, Michael. It would be interesting to find out if in fact, as opposed to theory, this geothermal plant is increasing activity or not.
Belle (Orchid Lady) February 25, 2013 at 11:17 PM
OK Michael, with some quick reading, I found that the Geysers uses steam operastions-which is the traditional way-not enhanced geothermal systems, which are thought to ( by most scientists ) increase the seismic activity of the area where EGS is used. Therefore, the current geothermal plant is not causing increased seismic activity. http://www.ucsusa.org/clean_energy/our-energy-choices/renewable-energy/how-geothermal-energy-works.html
MICHAEL P WILSON "Independent Kid" February 26, 2013 at 01:46 AM
Paul 500 million in tax money lost to Solyndra. 500 million could buy alot of school books.
Carolyn Andrews February 27, 2013 at 07:55 PM
Thanks to Belle for checking the facts and the science.
Belle (Orchid Lady) February 28, 2013 at 08:20 PM
Sure Carolyn. But Michael is correct, that the plants that are using the Enhanced methods, that inject waste water on to "dry rocks that still have heat, but allow no escape for steam (closed loop system) are linked to increased seismic activity. Similar results to that of fracking, with the same concerns. It remains true though that the Geyser's do NOT use this method.


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