MAN-MADE GEOTHERMAL
EARTHQUAKES
Analysis of Actual Ground-Shaking from Geothermal Earthquakes
Analysis of Peak Ground Accelerations and Earthquake Magnitudes (Nov. 2009)
Characteristics & Location of 2009 Earthquakes with PGA>3.9%g (Nov. 2009) Map
Maps of 18 Earthquakes with PGA>9.2%g (Nov. 2009)
Analysis of Peak Ground Accelerations and Earthquake Magnitudes (May 2008)
Summary of Location & Impact of Earthquakes Affecting Anderson Springs (Jan. 2005)
Summary of Strong Ground Motion Research Findings (Nov. 2004)
Analysis of Actual Ground-Shaking (Nov. 2004)
Resident Experiences of Feeling Earthquakes (Nov. 2004)
Public Nuisance Complaint & Petition (Sept. 2009)
Comments on 2009 AltaRock Project with NCPA
Comment Letter on AltaRock Project 2009
Charts of All Geysers Earthquakes, 1975 - 2009
NCPA M4.3 EQ Damage Photos 1 of 3
Chart of All Earthquakes >=M2.0 Summary Data for All Earthquakes >=M2.0
NCPA M4.3 EQ Damage Photos 2 of 3
Chart of All Earthquakes >=M3.0 Summary Data for All Earthquakes >=M3.0
NCPA M4.3 EQ Damage Photos 3 of 3
Chart of All Earthquakes >=M4.0 Summary Data for All Earthquakes >=M4.0
Results of Community-wide EARTHQUAKE SURVEYS
Charts of All Earthquakes within 5 Miles of Anderson Springs, 1975 - 2009
Chart of All Earthquakes >=M2.0 Summary Data for All Earthquakes >=M2.0
Survey Quotes
from Residents about Property Damage
3-Year Summary
of Property Damage
Charts of All Earthquakes within 3 Miles of Anderson Springs, 1975 - 2009
2004 Survey
RESULTS!
2004
Survey Form
Chart of All Earthquakes >=M2.0 Summary Data for All Earthquakes >=M2.0
2003 Survey
RESULTS!
2002 Survey
RESULTS!
Recent Press Coverage
Residents Seek Relief from Quakes, Press Democrat (Oct. 3, 2009)
German Geothermal Project Leads to Second Thoughts after Earth Rumbles, New York Times (Sept. 11, 2009)
Energy Company Calls Halt to Drilling Project, New York Times (Sept. 3, 2009)
Firm Suspends Controversial Geothermal Project, San Francisco Chronicle (Sept. 3, 2009)
AltaRock Suspends Geysers Drilling Project, Lake County News (Sept. 4, 2009)
Drilling Ordeal Said to Set Back Big Geothermal Project, New York Times (Aug 20, 2009)
Geothermal Power Search Holds Promise, Threat, San Francisco Chronicle (Aug. 16, 2009)
Quake Fears Stall Energy Extraction Project, New York Times (July 14, 2009)
Small Town Fears Quakes from Geothermal Energy Project, Sacramento Bee (July 13, 2009)
Another Shaker Hits The Geysers, Results in Property Damage, Lake County News (July 2, 2009)
3.8 Quake Recorded at The Geysers, Lake County News (July 1, 2009)
Company Says Proposed Geothermal Project Holds Promise for Renewables, Lake County News (June 30, 2009)
New Geothermal Project Raises Questions, Concerns, Lake County News (June 29, 2009)
How Does Geothermal Drilling Trigger Earthquakes?, Scientific-American (June 29, 2009)
Neighbors Worried About Quakes in Back Yard, Press Democrat (June 28, 2009)
Clean Energy vs Quake Fears, Press Democrat (June 28, 2009)
Deep in Bedrock, Clean Energy and Quake Fears, New York Times (June 24, 2009)
Compensation for Impacts
Lake County Supervisors' Resolution for Geothermal Impact Mitigation Fund (December 7, 2004)
Community Alliance Comments on Proposed Mitigation Fund (December 1, 2004)
Lake County's Proposed Geothermal Impact Mitigation Fund (October 28, 2004)
Scientific Papers on Earthquake Causation
It is a SCIENTIFIC FACT that geothermal production & injection activities are the PRIMARY CAUSE of increased earthquakes at
The Geysers (NOT natural, tectonic earthquakes):
Final Report to CEC:  Integrated High Resolution Microearthquake Analysis and Monitoring at The Geysers, April 26, 2004
Extensional Tectonics at The Geysers Geothermal Area, California, October 1986
New Evidence of the Causative Relationship between Well Injection and Microseismicity in The Geysers Geothermal Field, October 1993
Microseismicity in the Southeast Geysers before and after SEGEP Injection, October 1999
Near-Surface Microearthquakes at The Geysers Geothermal Field, California, April 2000
Characteristics of Microseismicity in the DV11 Injection Area, Southeast Geysers, California, January 1999
Earthquake Analysis
Significant Increases in Seismicity from the Southeast Geysers Pipeline (data through 12/31/04)
Earthquakes in the Southeast Geysers Since 1975 (data through 04/30/04)
PDF Version
Earthquakes near Anderson Springs Since 1975 (data through 4/30/04)
Earthquakes near Anderson Springs Since 1990 (data through 4/30/04)
Earthquake Depth & Causation near Anderson Springs Since 1975 (data through 12/31/03)
Earthquakes in The Geysers Geothermal Field Since 1975 (data through 04/30/04)
Comparative Ratios of Geysers Earthquakes Since 1975 (data through 10/31/03)
Findings & Comments to the Lake County Seismic Monitoring Advisory Committee (data through 5/13/03)
Cumulative Trends & Analysis of Wastewater Injection, Steam Production & Earthquakes in the Southeast Geysers, 1997 through 2002 (data through 12/31/02)
Past Press Coverage
Shaking up the Springs, Lake County Record-Bee (December 31, 2004)
Lake County Town Blames Energy Company for Quake Problem, ABC Channel 10 News (Sacramento) (November 15, 2004)
Link to Video of News Story
Geysers Firms Offer $100,000 to Lake Neighbors, Press Democrat (November 10, 2004)
3.1 Quake Centered in The Geysers, Lake County Record-Bee (October 23, 2004)
Man-Made Quakes (Letter to the Editor), Press Democrat (August 13, 2004)
Study Needed to Show If Geysers Quakes Are Damaging Homes (Editorial), Press Democrat (August 4, 2004)
Geysers-area Quakes up 30% Since Start of Wastewater Use, Press Democrat (August 3, 2004)
Man-Made Quakes Rattle North Bay Town, NBC Channel 11 News (San Francisco) (May 11, 2004)
Group Debates Cause of Increasing Temblors, Lake County Record-Bee (May 12, 2004)
Northern Calif. Residents Seek Compensation, Platts POWER News (April 21, 2004)
Agitation Builds Over Man-Made Quakes, Los Angeles Times (April 12, 2004)
Calpine Plants Cause Earthquakes in California, L.A. Times Says, Bloomberg.com (April 12, 2004)
Quakes?  Town Points Finger at a Nearby Steam Project, San Francisco Chronicle (June 8, 2003)
California Heats Up Over Natural Steam, Scientific-American (December 10, 2001)
Earthquakes cause:  A matter of interpretation, Lake County Record-Bee (May 24, 2003) HTML
format
PDF format
Another 'Quake Jolts Anderson Springs, Lake County Record-Bee (May 23, 2003)
Moderate Quakes Rattle Residents, Press Democrat (May 23, 2003)
4.2 'Quake Rumbles The Geysers, Lake County Record-Bee (May 21, 2003)
3.65 'Quake Hits Anderson Springs, Lake County Record-Bee (May 6, 2003)
Two Quakes in a Row Rattle Lake County, Press Democrat (May 4, 2003)
Not Reassured, Letter to the Editor, Press Democrat (August 9, 2002)
All Shook Up (Editorial), Press Democrat (August 6, 2002)
Steam Fields Upset Residents, The Oakland Tribune (August 6, 2002)
Town Jitters Blamed on Geysers, Press Democrat (August 5, 2002)
A Whole Lot of Shaking Going On, Chris Coursey, Press Democrat (January 11, 2002)
Steam-Field Shudders, Press Democrat (March 14, 1999)
Lake Air Quality is '10' Again, Press Democrat (June 21, 1997)
24 Wells at Geysers Could Spew Lethal Gas, Press Democrat (April 16, 1997)
Seismo-Watch
Seismo-Watch, Press Democrat (March 22, 2003)
Seismo-Watch, Press Democrat (November 9, 2002)
Seismo-Watch, Press Democrat (August 10, 2002)
Seismo-Watch, Press Democrat (July 27, 2002)
Seismo-Watch, Press Democrat (May 25, 2002)
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