June 27, 2009 8:23 AM Subscribe
posted by 445supermag (33 comments total)
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There are worries that a new geothermal project in California may cause earthquakes
(nice animation from NYT and here's the full article
). These worries are not just theoretical, its happened before...Enhanced Geothermal Systems
(dry rock geothermal) are blamed for increased seismicity:
"The HDR project in Basel, Switzerland was suspended after it caused an earthquake. On 8 December 2006, only 8 days after water injection started, an event occurred measuring 3.4 on the Richter Scale with the focus at the bottom of the HDR borehole. The eventprompted concern from local residents. Water injection was immediately stopped, but minor events continued. Further tremors were recorded on 6 January (measuring 3.1) and 16 January 2007 (3.2)."
Short (12min) video segment from the California PBS science show Quest on geothermal in California
(lots of details on EGS and California geothermal).