EGS: Interactive, Real-Time Map of Earthquakes at The Geysers
esd.lbl.gov
.....At this time there are three major earthquake swarms occurring in the world, and they just happen to be along the Pacific Rim from northern Mexico to Alaska. The first is the 'Cerro Prieto' volcano and geothermal field at the Baja Peninsula near Mexicali, Calif. The second is the Clear Lake volcano; also known as 'The Geysers' geothermal field in northern California near Santa Rosa just north of San Francisco. The third swarm is at Atka volcano along the Aleutian Islands.
Baja 'Cerro Prieto' Map - CLICK HERE
Clear Lake 'The Geysers' Map - CLICK HERE
Atka volcano Map - CLICK HERE
fourwinds10.net
....... Elaine Supkis
May 6, 2009
The steam at this site is created by flushing in fresh water all the time and this causes the site to ‘breathe’ in and out. The cluster quakes have been going on since it was launched. Back in the early 1970’s, I and others campaigned against installing this energy plant. I explained, this wasn’t like Iceland with them tapping into a volcano, this is along one of the most dangerous slip/slide fault systems on earth! But we were overruled.
The number of quakes have increased in volume and intensity in the last 2 years. I write about it at my blog periodically. Below is one such story from January, 2007: http://elainemeinelsupkis.typepad.com/earth_news/2007/01/mining_and_flui.html
Mike
May 6, 2009
You might also be interested to know the micro-quakes directly map to drilling in the area. As drilling increases (rework or tapping into the field) the quakes increase. For the past two years two new plants have been under development and if you watch the USGS map of the area, you can see when they’re drilling and when they’re not. Base level non-drilling is about 100 micro-quakes a week. While drilling, it doubles.
Also, as Elaine notes, about 30% of the volume extracted is being reinjected into the reservoir, that also contributes. Finally, since 70% of the mass isn’t replaced, a fair amount of the activity can be attributed to subsidence.
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