Linking the scaling of tremor and slow slip near Parkfield, CA.
Linking the scaling of tremor and slow slip near Parkfield, CA.
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DOI：
10.1038/s41467-022-33158-3
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发表时间：
2022-10-03
影响因子：
16.6
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中科院分区：
文献类型：
--
作者：
关于产生慢地震的断层带过程，包括震颤和慢滑动，有很多争论。事实上，我们仍然在争论震颤和缓慢滑动是由不同尺度下的同一过程还是由两个不同的过程产生的。在这里，我们调查震颤缩放附近帕克菲尔德，加州，我们研究如何破裂持续时间尺度与时刻。我们彻底搜索和检测低频地震（LFE），构成震颤和鲁棒地估计其持续时间。我们的研究结果表明，不同的持续时间（0.1-0.6秒）和光谱的LFEs在同一位置。这些变化证实了一个共同的假设，即LFE观测到的低频内容是由于源过程，而不是路径效应。LFE的振幅和频谱变化与线性矩持续时间标度一致：在慢滑事件中观察到相同的标度。相似的比例表明，震颤和慢滑事件是由相同的断层带过程，当我们试图确定的过程中产生慢地震，我们应该把重点放在过程中，允许更高的滑动速率较小的断层。黄和霍桑提出了新的证据，支持震颤和缓慢滑动是由相同的时刻，持续时间的比例。一阶含义包括震颤和缓慢滑动可能是由同一个断层带过程产生的。
There has been much debate about the fault zone processes that generate slow earthquakes, including tremor and slow slip. Indeed, we still debate whether tremor and slow slip are generated by the same process operating at different scales or by two distinct processes. Here we investigate tremor scaling near Parkfield, California; we examine how rupture duration scales with moment. We thoroughly search for and detect the low frequency earthquakes (LFEs) that constitute tremor and robustly estimate their durations. Our results show varying durations (0.1–0.6 s) and spectra for LFEs at the same location. These variations confirm a common assumption, that LFEs’ observed low frequency contents are due to source processes, not path effects. The LFEs’ amplitude and spectra variations are consistent with a linear moment-duration scaling: the same scaling observed among slow slip events. The similar scaling suggests that tremor and slow slip events are governed by the same fault zone process and that when we attempt to identify the process creating slow earthquakes, we should focus on processes which allow higher slip rates on smaller faults. Huang and Hawthorne present new evidence supporting that tremor and slow slip are linked by the same moment-duration scaling. First-order implications would include that tremor and slow slip are likely generated by the same fault zone process.
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影响因子：
18.3
作者：
Ikari, Matt J.;Marone, Chris;Kopf, Achim J.
通讯作者：
Kopf, Achim J.
影响因子：
56.9
作者：
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影响因子：
3.9
作者：
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通讯作者：
Rubin, A. M.
影响因子：
3.9
作者：
Farge, Gaspard;Shapiro, Nikolai M.;Frank, William B.
通讯作者：
Frank, William B.
影响因子：
5.2
作者：
Frank, William B.;Shapiro, Nikolai M.;Prieto, German A.
通讯作者：
Prieto, German A.