Dynamic high‐speed rupture from the onset of the 2004 Parkfield, California, earthquake
Dynamic high‐speed rupture from the onset of the 2004 Parkfield, California, earthquake
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2004 年加利福尼亚州帕克菲尔德地震开始时的动态高速破裂
DOI：
10.1029/2008gl036824
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发表时间：
2009
影响因子：
5.2
通讯作者：
G. Beroza
中科院分区：
文献类型：
--
作者：
T. Uchide;S. Ide;G. Beroza
我们使用多尺度滑动反演研究了2004年帕克菲尔德地震。多尺度方法使我们既可以关注破裂过程早期阶段的细节，又可以在更大的尺度上模拟整个地震。我们的模型表明，帕克菲尔德地震开始于双边高速破裂，滑动速率快，高达4米/秒，传播速度快，约为3.0公里/秒。破裂向东南方向的传播在发生后3 s停止，而向西北方向的传播继续，在105 s时产生一个大的滑动斑块，并在10 s内停止。在先前的研究中，2004年日本新泻县中期地震也观察到了类似的快速启动。高速的初始破裂表明，大地震可能以与小地震相同的方式开始和发展，并且很难从地震的早期阶段预测最终的规模。
We investigated the 2004 Parkfield earthquake using a multiscale slip inversion. The multiscale approach allows us to both focus on the details of the early stages of the rupture process, and to model the entire earthquake at a larger scale. Our model indicates that the Parkfield earthquake began with bilateral high‐speed rupture with fast slip rate, up to 4 m/s, and fast propagation velocity of about 3.0 km/s. Rupture propagation to the southeast was arrested 3 s after onset, while propagation to the northwest continued, generated a large slip patch at ∼5 s, and ceased within 10 s. A similar rapid initiation was observed for the 2004 mid‐Niigata Prefecture, Japan, earthquake in a previous study. High‐speed initial rupture suggests that large earthquakes may initiate and grow in the same way as small earthquakes, and that the final size is difficult to predict from the early stages of an earthquake.
多尺度滑移反演方法的发展及其在2004年新泻县中部地震中的应用
DOI：
--
发表时间：
2007
期刊：
Journal of Geophysical Research 112
影响因子：
--
作者：
Uchide;T. and S. Ide
通讯作者：
T. and S. Ide