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首页> 外文期刊>Earth, planets and space: EPS >Can undersea voltage measurements detect tsunamis?
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Can undersea voltage measurements detect tsunamis?

机译：海底电压测量可以检测到海啸吗？

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摘要

The movement of electrically conducting ocean water in the ambient geomagnetic field induces secondary electric and magnetic fields in the oceans. Ocean water transport is now routinely inferred from undersea cable voltage data. We try to answer the question whether the method could also be useful to detect tsunami. A barotropic shallow water model along with a three-dimensional electromagnetic induction code was used to predict the electric fields induced by the Indian Ocean Tsunami occurred on December 26, 2004. We show that the ocean flow related to the Indian Ocean Tsunami must have induced electric voltages of the order of +/-500 mV across the existing submarine cables in the Indian Ocean. The electric fields induced by the Tsunami flow have strength within the range of +/-10 mV/km, with enhancements along the main flow region and near the coasts and islands. Thus, making use of the in-service or retired submarine cables to measure the electric potential across oceans, it may be possible to detect water movement related to tsunami.
机译：导电海水在周围地磁场中的运动会在海洋中感应二次电场和磁场。现在，通常可以从海底电缆电压数据推断出海水的运输。我们试图回答这个方法是否也可以用于检测海啸的问题。使用正压浅水模型和三维电磁感应代码来预测2004年12月26日发生的印度洋海啸引起的电场。我们表明，与印度洋海啸有关的洋流必定已经感应出电场印度洋现有海底电缆上的电压约为+/- 500 mV。由海啸流感应的电场强度在+/- 10 mV / km范围内，沿主要流动区域以及靠近海岸和岛屿的方向有所增强。因此，利用在役或已退役的海底电缆来测量跨洋的电势，有可能检测与海啸有关的水运动。

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