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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Near- and far-field tsunamigenic effects on the Z component of the geomagnetic field during the Japanese event, 2011
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Near- and far-field tsunamigenic effects on the Z component of the geomagnetic field during the Japanese event, 2011

机译：近和远场tsunamigenic影响Z组件的地磁场日本事件,2011

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摘要

In this work, we examine the vertical component (Z) of the geomagnetic field observed by ground-based observatories during the tsunami event which happened on 11 March 2011. For this event, we have selected nine magnetic observatories distributed along the tsunami passage, covering up to 3000 km epicentral distance. The traveltime diagram of the magnetic disturbances is constructed and compared with the simulated tsunami traveltime diagram. From this comparison, we identify the amplified magnetic disturbances appearing during the tsunami arrival in the vicinity of these observatories. Moreover, mean absolute percentage error map is constructed to examine the cross correlations among different observatories and the amplified disturbances are found to be highly correlated. These features suggest that the amplified disturbances are tsunamigenic in nature. These results are in confirmation with the previous near-field studies, and they shed new insight into the tsunamigenic magnetic disturbances on near- and far-field distances from the epicenter.
机译：在这项工作中,我们检查垂直分量(Z)的地磁场观测到地面天文台在海啸2011年3月11日发生的事件。事件,我们选择了9个磁天文台分布沿海啸通道,掩盖震中3000公里距离。构造扰动和相比模拟海啸走时图。比较,我们识别磁放大扰动出现在海啸到来附近的这些天文台。平均绝对百分比误差映射构造检查之间的交叉相关性不同天文台和放大干扰发现是高度相关的。表明,扰动放大tsunamigenic。确认之前的近场研究,他们摆脱新的见解附近,tsunamigenic磁干扰远场距离震中。

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