Hierarchical interlocked orthogonal faulting in the 2019 Ridgecrest earthquake sequence.
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| Title: | Hierarchical interlocked orthogonal faulting in the 2019 Ridgecrest earthquake sequence. |
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| Authors: | Ross, Zachary E., Idini, Benjamín, Jia, Zhe, Stephenson, Oliver L., Zhong, Minyan, Wang, Xin, Zhan, Zhongwen, Simons, Mark, Fielding, Eric J., Yun, Sang-Ho, Hauksson, Egill, Moore, Angelyn W., Liu, Zhen, Jung, Jungkyo |
| Source: | Science (pre-March 2025). 10/18/2019, Vol. 366 Issue 6463, p346-351. 6p. 3 Color Photographs, 3 Graphs. |
| Subjects: | Orthogonal arrays, Earthquakes, Seismic response, Geodesy, Earthquake swarms |
| Abstract: | A nearly 20-year hiatus in major seismic activity in southern California ended on 4 July 2019 with a sequence of intersecting earthquakes near the city of Ridgecrest, California. This sequence included a foreshock with a moment magnitude (Mw) of 6.4 followed by a Mw 7.1 mainshock nearly 34 hours later. Geodetic, seismic, and seismicity data provided an integrative view of this sequence, which ruptured an unmapped multiscale network of interlaced orthogonal faults. This complex fault geometry persists over the entire seismogenic depth range. The rupture of the mainshock terminated only a few kilometers from the major regional Garlock fault, triggering shallow creep and a substantial earthquake swarm. The repeated occurrence of multifault ruptures, as revealed by modern instrumentation and analysis techniques, poses a formidable challenge in quantifying regional seismic hazards. [ABSTRACT FROM AUTHOR] |
| Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Psychology and Behavioral Sciences Collection |
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