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首页> 外文期刊>Earth, planets and space: EPS >Rapid calculation of a Centroid Moment Tensor and waveheight predictions around the north Pacific for the 2011 off the Pacific coast of Tohoku Earthquake
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Rapid calculation of a Centroid Moment Tensor and waveheight predictions around the north Pacific for the 2011 off the Pacific coast of Tohoku Earthquake

机译：在东北太平洋太平洋沿岸2011年快速计算质心矩张量和波高预测

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摘要

We present the results of a near real-time determination of a Centroid Moment Tensor for the 2011 Tohoku quake and the subsequent rapid prediction of Pacific coast tsunami waveheights based on these CMT parameters. Initial manual CMT results for this event were obtained within 23 minutes of origin time and fully automatic results were distributed by E-mail within 33 minutes. The mechanism, depth and moment magnitude were all well constrained, as was indicated by a bootstrapping analysis. Using an existing library of tsunami Green's functions, we computed predicted waveheights in the north Pacific for several scenarios of the Tohoku earthquake that are consistent with the CMT solution. Overall, these predicted waveheights correspond well with preliminary observations around the Pacific Rim. The predictions for North America were sent out three and a half hours after the origin time of the earthquake, but this system has the potential to provide these predictions within minutes after receiving the CMT solution.
机译：我们介绍了2011年东北地震的质心矩张量的近实时确定结果，以及基于这些CMT参数随后对太平洋沿岸海啸波高的快速预测。此事件的初始手动CMT结果在原始时间的23分钟内获得，全自动结果通过电子邮件在33分钟内分发。自举分析表明，机理，深度和力矩大小都受到很好的约束。使用现有的海啸格林函数库，我们针对东北地震的几种情景，计算了北太平洋在北太平洋的预测波高，这些情景与CMT解决方案一致。总体而言，这些预测的波高与环太平洋地区的初步观测值非常吻合。北美地震的预测是在地震发生后的三个半小时内发出的，但是该系统有可能在收到CMT解决方案后的几分钟内提供这些预测。

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