Evaluation of potential hazards from teletsunami in China: Tidal observations of a teletsunami generated by the Chile 8.8 Mw earthquake
Evaluation of potential hazards from teletsunami in China: Tidal observations of a teletsunami generated by the Chile 8.8 Mw earthquake
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DOI：
10.1007/s11434-010-4307-9
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发表时间：
2011-04
影响因子：
--
通讯作者：
Fujiang Yu;Ye Yuan;Lianda Zhao;Peitao Wang
中科院分区：
文献类型：
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作者：
Fujiang Yu;Ye Yuan;Lianda Zhao;Peitao Wang
北京时间2010年2月27日14时34分，智利中部沿海发生里氏8.8级地震。大地震引发了一场远程海啸，并在不到24小时的时间内传播到整个太平洋。初始海啸波于2月28日16时20分到达我国东南沿海，并被中国大陆和台湾省近海的多个验潮站以真实的时间记录到。在此之前，我国从未记录到如此大范围的海啸波。本工作的目的是报告的海平面振荡所产生的智利海啸的第一个描述，并评估远程海啸对中国沿海的潜在危害。结果表明，台湾省东部沿海、浙江省和福建省北部沿海是跨洋海啸的脆弱区。此外，记录的海平面振荡的频谱和小波分析表明，“假潮”很容易激发的共振之间的相互作用所产生的初始海啸波和当地的几何形状（如半封闭的海湾和港口）。两种振荡的叠加会进一步放大波高。
At 14:34 Beijing time on February 27, 2010, an earthquake ofMw8.8 rocked the central coast of Chile. A teletsunami was triggered by the huge earthquake and then propagated across the entire Pacific in less than 24 h. The initial tsunami wave arrived at the southeast coast of China at 16:20 on February 28 and was recorded in real time by a number of tidal gauges off mainland China and Taiwan Province. The teletsunami waves have never been recorded with such a broad geographical scope in China before this event. The aim of the present work is to report the first description of sea-level oscillations generated by the Chile tsunami, and evaluate the potential hazards that teletsunami poses to the coast of China. The results reveal that the east coast of Taiwan Province, Zhejiang Province and the north coast of Fujian Province are vulnerable to transoceanic tsunami. In addition, spectral and wavelet analysis of the recorded sea-level oscillations shows that “seiches” are easily excited by the resonance resulting from the interaction between the initial tsunami waves and local geometry (such as semi-enclosed bays and ports). The superimposition of the two oscillations would amplify the wave height further.