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Locations of Injection-Induced Earthquakes in Oklahoma Controlled by Crustal Structures
Pei, SP (Pei, Shunping)1; Peng, ZG (Peng, Zhigang)2; Chen, XW (Chen, Xiaowei)3
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
2018-03-01
Volume123Issue:3Pages:2332-2344
DOI10.1002/2017JB014983
Abstract

In recent years, many small- to moderate-size earthquakes occurred in central northern Oklahoma, likely associated with wastewater injection. The most recent one is the M5.8 Pawnee earthquake occurred on 3 September 2016. It is still not clear what controls the locations of these injection-induced earthquakes. Here we conduct 2-D Pg wave tomography with anisotropy to image seismogenic structures in this region, using more than 10years of Pg arrivals recorded by 81 seismic stations. Our high-resolution Pg wave tomography shows two high-velocity zones with northwest fast direction alternated by low-velocity zones with northeast fast direction. The two dominant anisotropy directions are consistent with conjugated microfractures from surface faults and two nodal planes from focal mechanisms of moderate-size earthquakes. Most moderate-size (M>4) earthquakes occurred either close to the boundaries between high- and low-seismic velocity zones or within the high-velocity zones, suggesting that they are associated with geological boundaries of different basement rock properties or with strong material properties in the upper crust. We suggest that although these moderate-size earthquakes were induced by fluid injection, their spatial locations were likely controlled by local geologic structures.

Subject Area固体地球物理学
WOS IDWOS:000430393900017
Language英语
Indexed BySCIE
Keywordw 5.8 Pawnee Seismic Velocity Structure Yushu Earthquake Fluid Injection Tomography Constraints Inversion Fairview Disposal Increase
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
Cooperation Status国际
ISSN2169-9313
Department大陆碰撞与高原隆升重点实验室
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8707
Collection图书馆
Corresponding AuthorPei, SP (Pei, Shunping)
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing, Peoples R China;
2.Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA;
3.Univ Oklahoma, Sch Geol & Geophys, Norman, OK 73019 USA.
Recommended Citation
GB/T 7714
Pei, SP ,Peng, ZG ,Chen, XW . Locations of Injection-Induced Earthquakes in Oklahoma Controlled by Crustal Structures[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2018,123(3):2332-2344.
APA Pei, SP ,Peng, ZG ,&Chen, XW .(2018).Locations of Injection-Induced Earthquakes in Oklahoma Controlled by Crustal Structures.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,123(3),2332-2344.
MLA Pei, SP ,et al."Locations of Injection-Induced Earthquakes in Oklahoma Controlled by Crustal Structures".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 123.3(2018):2332-2344.
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