A revised position for the primary strand of the Pleistocene-Holocene San Andreas fault in southern California.
A revised position for the primary strand of the Pleistocene-Holocene San Andreas fault in southern California.
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加州南部更新世-全新世圣安德烈亚斯断层主带的修正位置。
DOI：
10.1126/sciadv.aaz5691
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发表时间：
2021-03
期刊：
影响因子：
13.6
通讯作者：
Rymer M
中科院分区：
文献类型：
--
作者：
Blisniuk K;Scharer K;Sharp WD;Burgmann R;Amos C;Rymer M
100 ka的滑动记录揭示了圣安德烈亚斯断层南部使命溪沿岸发生大地震的可能性。圣安德烈亚斯断层在南加州发生大规模地震的概率最高。然而，在洛杉矶大都市区以东的断层是多股的地方，一直不确定哪一股具有最快的滑动速率，因此，哪一股具有最高的破坏性地震的可能性。使用铀钍土壤碳酸盐和铍-10表面暴露技术重建的偏移更新世-全新世地貌表明，圣安德烈亚斯断层的滑动速率为每年24.1 ± 3毫米，使命溪和班宁段分别为每年21.6 ± 2毫米和2.5 ± 1毫米。这些数据确定了使命溪带是在这个纬度上连接太平洋和北美板块的主要断层，并暗示自最近的地表破裂地震以来，沿着断层沿着积累了6至9米的弹性应变，突出了沿着该带沿着发生大地震的可能性。
A 100 ka record of slip reveals the potential of large earthquakes on the Mission Creek strand of the southern San Andreas Fault. The San Andreas fault has the highest calculated time-dependent probability for large-magnitude earthquakes in southern California. However, where the fault is multistranded east of the Los Angeles metropolitan area, it has been uncertain which strand has the fastest slip rate and, therefore, which has the highest probability of a destructive earthquake. Reconstruction of offset Pleistocene-Holocene landforms dated using the uranium-thorium soil carbonate and beryllium-10 surface exposure techniques indicates slip rates of 24.1 ± 3 millimeter per year for the San Andreas fault, with 21.6 ± 2 and 2.5 ± 1 millimeters per year for the Mission Creek and Banning strands, respectively. These data establish the Mission Creek strand as the primary fault bounding the Pacific and North American plates at this latitude and imply that 6 to 9 meters of elastic strain has accumulated along the fault since the most recent surface-rupturing earthquake, highlighting the potential for large earthquakes along this strand.
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影响因子：
2.7
作者：
Blisniuk, Kimberly;Oskin, Michael;Sharp, Warren
通讯作者：
Sharp, Warren
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3
作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
3
作者：
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通讯作者：
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影响因子：
2.5
作者：
Guns, Katherine A.;Bennett, Richard A.;McGill, Sally F.
通讯作者：
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