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首页> 外文期刊>Earth, planets and space: EPS >Coseismic and early postseismic slips associated with the 2011 off the Pacific coast of Tohoku Earthquake sequence: EOF analysis of GPS kinematic time series
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Coseismic and early postseismic slips associated with the 2011 off the Pacific coast of Tohoku Earthquake sequence: EOF analysis of GPS kinematic time series

机译：与2011年东北太平洋海岸太平洋地震序列相关的地震和早期地震滑动：GPS运动时间序列的EOF分析

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GPS kinematic time series are analyzed to estimate slip distributions for the Mw 9.0 2011 off the Pacific coast of Tohoku Earthquake sequence. Empirical orthogonal function (EOF) analysis is employed to enhance the signal-to-noise ratio of the original time series. The coseismic, and subsequent postseismic, deformations of the foreshock can be described by a single mode, suggesting that the extent of the source for both events must be similar. The total moment magnitude of the afterslip following the foreshock is estimated to be Mw 7.1 with a decay time of 0.63 days. The magnitude of the afterslip was larger for its duration than was anticipated by the scaling law for a typical slow earthquake, although two previous earthquakes in adjacent regions showed the same tendency as that in the present case. The pattern of slip of the mainshock and the subsequent afterslips and aftershocks indicates that each slip occurs in a region adjacent to that of the previous slips in a complementary manner. Finally, in the course of the EOF analysis, the modes representing the thermal expansion of the GPS pillars are clearly identified
机译：分析了GPS运动时间序列，以估算东北地震序列太平洋沿岸M w 9.0 2011的滑动分布。经验正交函数（EOF）分析用于增强原始时间序列的信噪比。前震的同震和随后的震后变形可以用单一模式描述，这表明这两个事件的震源范围必须相似。前震后的滑移的总矩量估计为M w 7.1，衰减时间为0.63天。滑移的持续时间比典型慢地震的定标律所预期的要大，尽管相邻区域的前两次地震表现出与当前情况相同的趋势。主震以及随后的余震和余震的滑动模式表明，每个滑动以互补的方式出现在与先前的滑动相邻的区域中。最后，在EOF分析过程中，清楚地确定了代表GPS支柱热膨胀的模式

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