File Name: anthropogenic seismicity rates and operational parameters at the salton sea geothermal field .zip
The Groningen gas field shows exponential growth in earthquake event counts around a magnitude M1 with a doubling time of years since
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- Can Repetitive Small Magnitude-Induced Seismic Events Actually Cause Damage?
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Oliver-Denzil S. Taylor, Alanna P. Lester, Theodore A.
Bulletin of the Seismological Society of America ;; 4 : — At the Salton Sea Geothermal field SSGF , one of the largest geothermal field in southern California, a local borehole seismic network, has improved monitoring of small earthquakes and allows us to better understand the seismogenic response to injection operations and corresponding earthquake hazard. Then we investigate the characteristics of 48 spatiotemporal isolated earthquake clusters. The analysis reveals a wide distribution of swarms and aftershock sequences across the whole region. The differences suggest that geothermal operation has clear influence on seismicity characteristics, indicating a possibility of distinguishing induced seismicity from natural seismicity. Shibboleth Sign In.
Can Repetitive Small Magnitude-Induced Seismic Events Actually Cause Damage?
Seismicity in these two regions was analyzed within day windows before and after the occurrence of five major earthquakes: the Denali fault, Alaska Mw7. The Denali Mw7. However, in the Coso region the seismicity rate remained approximately constant during the day observation period. The seismicity after the Sumatra-Andaman Mw9. The seismicity after the Chile Mw8. The seismicity in Salton Sea and Coso regions increased 17 and 14 days, respectively, after the Japan Mw9. Similarly, 6 and 16 days after the northern Sumatra Mw8.
1). The Salton Sea Geothermal Field ex- ploits a hot, geothermal brine with temperatures in excess of °C at 2 km depth (10, 11). The field.
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Whether static or dynamic stress changes play the most important role in triggering earthquakes in the near field is still in debate. Here, we examine the seismicity rate changes in southern California following the M w 7. A significant increase in seismic activity is found in both study regions immediately following the main shock. In comparison, along the SJFZ with an increase in the static Coulomb stress, the seismicity rate remained higher than the background rate with several moderate-size earthquakes occurring in the subsequent months. While we cannot completely rule out other mechanisms, these observations are best consistent with a widespread increase in seismicity from dynamic stress changes immediately after the main shock, and longer term seismicity rate changes from static stress changes.
Geological Survey, Menlo Park, In situ continuous monitoring of borehole displacements induced by stimulated hydrofracture growth Y. Guglielmi, P. Cook, F.
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