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Temporal changes of seismicity in Salton Sea Geothermal Field due to distant earthquakes and geothermal productions

Li, Chenyu and Peng, Zhigang and Yao, Dongdong and Meng, Xiaofeng and Zhai, Qiushi (2022) Temporal changes of seismicity in Salton Sea Geothermal Field due to distant earthquakes and geothermal productions. Geophysical Journal International, 232 (1). pp. 287-299. ISSN 0956-540X. doi:10.1093/gji/ggac324.

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The Salton Sea Geothermal Field (SSGF) is one of the most seismically active and geothermally productive fields in California. Here we present a detailed analysis of short-term seismicity change in SSGF from 2008 to 2013 during and right following large distant earthquakes, as well as long-term seismicity change due to geothermal productions. We first apply a GPU-based waveform matched-filter technique (WMFT) to the continuous data recorded by the Calenergy Borehole (EN) Network and detect more than 70 000 new micro-earthquakes than listed in the standard Southern California Seismic Network catalogue. We then analyse the seismicity rate changes in the SSGF associated with transient stress fluctuations triggered by regional and large teleseismic earthquakes from 1999 to 2019. We find triggered seismicity in the SSGF following seven regional M > 5.5 earthquakes. In comparison, most teleseismic earthquakes with M > 8.0 did not trigger significant seismicity rate change in the SSGF, likely indicating a frequency dependence in remote dynamic triggering. We further characterize the correlation between the long-term seismicity rate and geothermal production rates, and the temporal and spatial distribution of Guttenberg–Richter b-values inside and outside the SSGF with the newly detected catalogue. The long-term seismicity shows that events with M > 1.5 are likely correlated with net production rates, while smaller events do not show any correlation. The b-values inside the SSGF are higher than those outside the SSGF, and the locations of dynamically triggered events are close to locations with high b-values.

Item Type:Article
Related URLs:
URLURL TypeDescription
Li, Chenyu0000-0002-0442-6928
Peng, Zhigang0000-0002-0019-9860
Yao, Dongdong0000-0002-2280-6617
Meng, Xiaofeng0000-0002-3750-6342
Zhai, Qiushi0000-0003-2583-5146
Additional Information:We appreciate SCEDC for making the waveform data and earthquake catalogues open to public. We thank GJI editor Andrew Barbour, assistant editor Louise Alexander, reviewer Ricardo Alfaro-Diaz and one anonymous reviewer for the helpful suggestions to improve this manuscript. This paper benefits from useful discussions with Shengji Wei, Debi Kilb, Emily Brodsky, Wenyuan Fan and Wei Wang. This research was supported by the Southern California Earthquake Center (contribution no. 11964, award nos 10010 and 17230). SCEC is funded by NSF Cooperative Agreement EAR-1600087 and USGS Cooperative Agreement G17AC00047. The GPU-based WMFT utilized the Comet GPU cluster in the XSEDE (eXtreme Science and Engineering Discovery Environment), which is supported by National Science Foundation grant OCI-1053575.
Group:Seismological Laboratory
Funding AgencyGrant Number
Southern California Earthquake Center (SCEC)10010
Southern California Earthquake Center (SCEC)17230
Issue or Number:1
Record Number:CaltechAUTHORS:20221017-14828800.28
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:117466
Deposited By: Research Services Depository
Deposited On:20 Oct 2022 16:45
Last Modified:20 Oct 2022 16:49

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