Nonlinear Earthquake Response of Marine Sediments With Distributed Acoustic Sensing
Nonlinear Earthquake Response of Marine Sediments With Distributed Acoustic Sensing
复制标题
分布式声学传感海洋沉积物的非线性地震响应
DOI:
10.1029/2022gl100122
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发表时间:
2022
影响因子:
5.2
通讯作者:
Shinohara, Masanao
中科院分区:
文献类型:
--
作者:
Viens, Loïc;Bonilla, Luis Fabian;Spica, Zack J.;Nishida, Kiwamu;Yamada, Tomoaki;Shinohara, Masanao
Soft sediment layers can significantly amplify seismic waves from earthquakes. Large dynamic strains can trigger a nonlinear response of shallow soils with low strength, which is characterized by a shift of resonance frequencies, ground motion deamplification, and in some cases, soil liquefaction. We investigate the response of marine sediments during earthquake ground motions recorded along a fiber‐optic cable offshore the Tohoku region, Japan, with distributed acoustic sensing (DAS). We compute AutoCorrelation Functions (ACFs) of the ground motions from 105 earthquakes in different frequency bands. We detect time delays in the ACF waveforms that are converted to relative velocity changes (dv/v).dv/vdrops, which characterize soil nonlinearity, are observed during the strongest ground motions and exhibit a large variability along the cable. This study demonstrates that DAS can be used to infer the dynamic properties of the shallow Earth with an unprecedented spatial resolution.
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影响因子:
3
作者:
Kubo, Hisahiko;Nakamura, Takeshi;Aoi, Shin
通讯作者:
Aoi, Shin
影响因子:
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作者:
V. Zaitsev;V. Nazarov;Vincent Tournat;V. Gusev;B. Castagnède
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B. Castagnède
影响因子:
5.2
作者:
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通讯作者:
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影响因子:
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作者:
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通讯作者:
U. Wegler;H. Nakahara;C. Sens‐Schönfelder;M. Korn;K. Shiomi
DOI:
--
发表时间:
2022
期刊:
影响因子:
--
作者:
Sakane Fumio;Hoshino Fumi;Murakami Chiaki;植松 祐真
通讯作者:
植松 祐真