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首页> 外文期刊>Journal of geodynamics >Observation and modeling of the seismic seiches triggered in the Gulf of Corinth (Greece) by the 2011 M-w 9.0 Tohoku earthquake
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Observation and modeling of the seismic seiches triggered in the Gulf of Corinth (Greece) by the 2011 M-w 9.0 Tohoku earthquake

机译：2011年东北9.0级东北地震在科林斯湾（希腊）引发的地震隐现的观测和建模

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摘要

The study reports an unusual water level rise in the Gulf of Corinth, central Greece, during the passing of the seismic waves of the remote 2011 M-w 9.0 Tohoku earthquake. The seismic seiches were recorded by a tide-gauge located in the marina of the island of Trizonia, in the western side of the gulf. The cross-analysis between the ground motion and the water level changes shows that seiching was initiated by the arrival of the earlier S-waves and then enhanced by the surface waves. The seiching concerns five domains with periods ranging from minute to about 7 min and with water level changes of a few millimeters to a few centimeters. The main seiching period is about 5-7 min and the related water level has a maximum trough-to-peak amplitude of about 6-8 cm. Numerical simulation of the seismic seiches, based on the shallow water equations, allows us to model reasonably well the amplitude of the seiches for most of the period domains, excepted those for the main seiching period at 7 min, which are underestimated by a factor of about 2-3. The largest bathymetric structures of the gulf to be excited in a seiche mode, with eigenperiods of hundreds of seconds, are a few kilometers in size.
机译：该研究报告称，在中部2011年M-w 9.0东北地震的地震波通过期间，希腊中部科林斯湾的水位异常升高。地震seiches是由位于海湾西侧的Trizonia岛码头上的一个潮汐仪记录的。地震动与水位变化之间的交叉分析表明，冲积作用是由较早的Ｓ波的到来引起的，然后由地表波增强。选矿涉及五个区域，其周期范围从分钟到大约7分钟，水位变化范围从几毫米到几厘米。主钻探周期约为5-7分钟，相关水位的最大谷峰幅度约为6-8 cm。基于浅水方程的地震围岩数值模拟，使我们能够合理地对大部分周期域的围岩振幅进行建模，但对于主震期在7 min时除外，这被低估了一个系数。大约2-3。以seiche模式激发的最大的深空结构，其本征周期为数百秒，大小为几公里。

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