Seismicity Rate Change at the Coso Geothermal Field Following the July 2019 Ridgecrest Earthquakes
| العنوان: | Seismicity Rate Change at the Coso Geothermal Field Following the July 2019 Ridgecrest Earthquakes |
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| المؤلفون: | J. Ole Kaven |
| المصدر: | Bulletin of the Seismological Society of America. 110:1728-1735 |
| بيانات النشر: | Seismological Society of America (SSA), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Geophysics, 010504 meteorology & atmospheric sciences, Field (physics), Geochemistry and Petrology, Rate change, Induced seismicity, 010502 geochemistry & geophysics, 01 natural sciences, Geothermal gradient, Geology, Seismology, 0105 earth and related environmental sciences |
| الوصف: | Many geothermal and volcanic regions experience remote and regional triggering following large earthquakes. The transient or permanent changes in stresses acting on faults and fractures can lead to changes in seismicity rates following either the passage of teleseismic waves or the permanent change in stresses following regional events. One such region of prevalent triggering is the Coso Geothermal Field (CGF) in eastern California, which is located roughly 30 km to the north of the 2019 Mw 7.1 Ridgecrest epicenter. Previous regional earthquakes have not only seemingly caused increase in seismicity rate surrounding the CGF, but also showed an absence of such rate increases in the CGF itself. To test whether seismicity rates in the CGF were dissimilar to the surrounding area following the Mw 7.1 Ridgecrest earthquake, I carry out seismicity rate change calculations using a catalog of seismicity compiled using a local seismic network and find that the behavior at CGF is identical to the surrounding area. Comparisons of seismicity rate changes calculated using a regional-network-derived catalog, and the local-network-derived catalog show that for a moderate, regional earthquake (2009 Mw 5.2 Olancha, California), the local network catalog reveals a change in seismicity rate whereas the regionally network catalog shows no significant changes. The differences are possibly related to incomplete sampling of seismicity using the regional network due to the existence of a shallow brittle–ductile transition centered on the CGF. The CGF, thus, is prone to triggering from both teleseismic and regional earthquakes. |
| تدمد: | 1943-3573 0037-1106 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::ff1803942cdc36918a52e8f66ca9547b https://doi.org/10.1785/0120200017 |
| رقم الأكسشن: | edsair.doi...........ff1803942cdc36918a52e8f66ca9547b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 19433573 00371106 |
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