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Assessing whether the 2017Mw5.4 Pohang earthquake in South Korea was an induced event
Science ( IF 44.7 ) Pub Date : 2018-04-26 , DOI: 10.1126/science.aat6081
Kwang-Hee Kim 1 , Jin-Han Ree 2 , YoungHee Kim 3 , Sungshil Kim 2 , Su Young Kang 1 , Wooseok Seo 1
Affiliation  

Triggering quakes in a geothermal space Enhanced geothermal systems (EGSs) provide a potentially clean and abundant energy source. However, two magnitude-5 earthquakes recently occurred in South Korea during EGS site development. Grigoli et al. and Kim et al. present seismic and geophysical evidence that may implicate the second of these earthquakes, which occurred in Pohang, as an induced event. The combination of data from a local seismometer network, well logs, satellite observations, teleseismic waveform analysis, and stress modeling leads to the assessment that the earthquake was probably or almost certainly anthropogenically induced. The possibility remains that the earthquake occurred coincidentally at the EGS site location, but the aftershock distribution and other lines of evidence are concerning for future development of this geothermal resource. Science, this issue p. 1003, p. 1007 Last year’s Pohang, South Korea, earthquake was potentially an induced earthquake from an enhanced geothermal system. The moment magnitude (Mw) 5.4 Pohang earthquake, the most damaging event in South Korea since instrumental seismic observation began in 1905, occurred beneath the Pohang geothermal power plant in 2017. Geological and geophysical data suggest that the Pohang earthquake was induced by fluid from an enhanced geothermal system (EGS) site, which was injected directly into a near-critically stressed subsurface fault zone. The magnitude of the mainshock makes it the largest known induced earthquake at an EGS site.

中文翻译:

评估 2017Mw5.4 韩国浦项地震是否为诱发事件

在地热空间引发地震 增强型地热系统 (EGS) 提供了一种潜在的清洁和丰富的能源。然而,最近在 EGS 站点开发期间,韩国发生了两次 5 级地震。格里戈利等。和金等人。目前的地震和地球物理证据可能表明发生在浦项的第二次地震是诱发事件。来自当地地震仪网络、测井、卫星观测、远震波形分析和应力建模的数据相结合,可以得出地震很可能或几乎肯定是人为诱发的评估。地震发生在 EGS 站点位置的可能性仍然存在,但余震分布和其他证据与该地热资源的未来开发有关。科学,这个问题 p。1003 页。1007 去年的韩国浦项地震可能是地热系统增强引起的诱发地震。2017 年发生在浦项地热发电厂下方的矩震级 (Mw) 5.4 浦项地震是韩国自 1905 年开始进行仪器地震观测以来破坏性最大的事件。 地质和地球物理数据表明,浦项地震是由来自增强型地热系统 (EGS) 站点,该站点直接注入近临界应力的地下断层带。主震的震级使其成为 EGS 站点已知的最大诱发地震。韩国,地震可能是地热系统增强的诱发地震。2017 年发生在浦项地热发电厂下方的矩震级 (Mw) 5.4 浦项地震是韩国自 1905 年开始进行仪器地震观测以来破坏性最大的事件。 地质和地球物理数据表明,浦项地震是由来自增强型地热系统 (EGS) 站点,该站点直接注入近临界应力的地下断层带。主震的震级使其成为 EGS 站点已知的最大诱发地震。韩国,地震可能是地热系统增强的诱发地震。2017 年发生在浦项地热发电厂下方的矩震级 (Mw) 5.4 浦项地震是韩国自 1905 年开始进行仪器地震观测以来破坏性最大的事件。 地质和地球物理数据表明,浦项地震是由来自增强型地热系统 (EGS) 站点,该站点直接注入近临界应力的地下断层带。主震的震级使其成为 EGS 站点已知的最大诱发地震。2017 年发生在浦项地热发电厂下方。 地质和地球物理数据表明,浦项地震是由来自增强型地热系统 (EGS) 站点的流体引起的,该流体直接注入近乎临界应力的地下断层带。主震的震级使其成为 EGS 站点已知的最大诱发地震。2017 年发生在浦项地热发电厂下方。 地质和地球物理数据表明,浦项地震是由来自增强型地热系统 (EGS) 站点的流体引起的,该流体直接注入近乎临界应力的地下断层带。主震的震级使其成为 EGS 站点已知的最大诱发地震。
更新日期:2018-04-26
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