气候变化领域集成服务门户(CCPortal): Cross Validation of Stress Drop Estimates and Interpretations for the 2011 Prague, OK, Earthquake Sequence Using Multiple Methods

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DOI	10.1029/2020JB020888
	Cross Validation of Stress Drop Estimates and Interpretations for the 2011 Prague, OK, Earthquake Sequence Using Multiple Methods
	Pennington C.N.; Chen X.; Abercrombie R.E.; Wu Q.
发表日期	2021
ISSN	21699313
卷号	126 期号:3
英文摘要	We compare source parameter estimates for earthquakes in the 2011 Prague Mw 5.7, Oklahoma, sequence to investigate random uncertainty and systematic bias, and resolve reliable relative variations in stress drop. Source parameters provide insight into the earthquake rupture processes but large variations between studies occur. The Prague earthquake sequence is a prime example of this, with different studies reaching contrasting interpretations of the effects of injection on source parameters. We examine the Prague earthquake sequence using a single coherent catalog for all the events detected by the Oklahoma Geological Survey (OGS) and McMahon et al. (2017). We use three principal approaches to estimate stress drop in order to understand the biases of each: a spectral decomposition method based on stacking, individual event spectral modeling, and a spectral ratio method based on highly correlated events. We also compare our results with previous studies for the Prague sequences aftershocks, as well as past results for the Mw 4.8 foreshock and Mw 4.8 aftershock and Mw 5.7 mainshock. The absolute values of stress drop vary significantly between methods, but the relative patterns remain consistent, except when low quality or low bandwidth data are included. The consistent relative patterns reveal that the stress drops of aftershocks are dependent on the fault orientation and the proximity of the events to the mainshocks slip. These results indicate that fault structure as well as past events play an important role in stress drop patterns. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Cross Validation; Induced Seismicity; Prague Oklahoma; Source Parameters; Stress Drop; Wastewater Injection
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187326
作者单位	School of Geosciences, The University of Oklahoma, Norman, OK, United States; Department of Earth and Environment, Boston University, Boston, MA, United States; Lettis Consultants International, Concord, CA, United States
推荐引用方式 GB/T 7714	Pennington C.N.,Chen X.,Abercrombie R.E.,et al. Cross Validation of Stress Drop Estimates and Interpretations for the 2011 Prague, OK, Earthquake Sequence Using Multiple Methods[J],2021,126(3).
APA	Pennington C.N.,Chen X.,Abercrombie R.E.,&Wu Q..(2021).Cross Validation of Stress Drop Estimates and Interpretations for the 2011 Prague, OK, Earthquake Sequence Using Multiple Methods.Journal of Geophysical Research: Solid Earth,126(3).
MLA	Pennington C.N.,et al."Cross Validation of Stress Drop Estimates and Interpretations for the 2011 Prague, OK, Earthquake Sequence Using Multiple Methods".Journal of Geophysical Research: Solid Earth 126.3(2021).