THE 2011 OFF THE PACIFIC COAST OF TOHOKU EARTHQUAKE TSUNAMI HYDRAULIC DATA OBSERVED AT CHOSHI OFFSHORE
THE 2011 OFF THE PACIFIC COAST OF TOHOKU EARTHQUAKE TSUNAMI HYDRAULIC DATA OBSERVED AT CHOSHI OFFSHORE
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2011年东北太平洋沿岸铫子海上观测到的地震海啸水力数据
DOI：
10.2208/kaigan.68.1
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发表时间：
2012
影响因子：
--
通讯作者：
T. Ikeya
中科院分区：
文献类型：
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作者：
Yukinari Fukumoto;H. Sukegawa;Nobuyuki Iwamae;T. Ikeya
2011年东北太平洋沿岸Mw9.0地震于2011年3月11日发生。日本太平洋沿岸出现强烈海啸，造成毁灭性破坏。利用放置在日本千叶县铫子市近海 3km 深 11m 的海底的超声波测波仪观测了水深、水压和水流速度水平分量的时间变化。得出以下结论。 1）海啸和最大余震可能同时发生。 2) 由于缺陷而导致的水深减少量大于由于上升而导致的水深增加量。 3) 退潮后发生的海啸可能是破浪。
The 2011 off the Pacific coast of Tohoku Earthquake, Mw9.0, occurred on the 11th March 2011. High tsunamis were observed on the Pacific coast of Japan and caused devastating damages. The temporal variation of water depth, hydraulic pressure and horizontal components of current velocity was observed by using the Ultrasonic-type wave gauge placed on th e sea bottom 11m deep and 3km offshore of Choshi city, Chiba prefecture, Japan. The following findings were made. 1) Tsunamis and the largest aftershock may occur simultaneously. 2) The amount of water depth decrease due to drawback is larger than that of water depth increase due to runup. 3) The tsunami coming after the drawback can be breaking wave.