2021年7月29日阿拉斯加半岛海域M<sub>W</sub>8.2地震海啸预警分析-海洋预报

2021年7月29日阿拉斯加半岛海域M_W8.2地震海啸预警分析

单位：1. 国家海洋环境预报中心 (自然资源部海啸预警中心), 北京 100081;
2. 南中国海区域海啸预警中心, 北京 100081

分类号：P731.25

出版年·卷·期（页码）：2022·39·第五期（1-7）

摘要：

梳理了国内外海啸预警中心对2021年7月29日14时16分（北京时）美国阿拉斯加半岛海域发生的M_W8.2浅源地震海啸的应急响应过程，并对各中心的海啸预警产品内容和发布情况进行了对比分析。结果表明：自然资源部海啸预警中心应急处置得当；美国机构的海啸预警发布效率更高，但在局地海啸最大波幅出现之前就取消了预警，存在安全隐患。结合此次事件，建议我国进一步加强全球海底强震的监测解析能力和海啸预警分析手段，并将海啸监测和预警能力继续拓展至全球大洋。

A shallow M_W8.2 earthquake occurred off the Alaska Peninsula at 14:16 on July 29, 2021 (Beijing time), triggering a small tsunami with the maximum wave amplitude of 51 cm recorded locally. The National Tsunami Warning Center (NTWC) of the Ministry of Natural Resources of P. R. China issued 2 tsunami bulletins for that event. This paper summarized the emergency response processes of domestic and international tsunami warning centers for the earthquake tsunami, and conducted a comparative analysis of their bulletin contents and issuing performances. The results showed that the NTWC made an appropriate response to the earthquake tsunami event. The U. S. tsunami warning agency was more efficient in issuing tsunami warnings, while it canceled the warning before the arrival of the maximum wave amplitude, which posed a potential safety problem. In light of this event, it's suggested that China should further strengthen the monitoring and detection capabilities of strong earthquakes on the global seabed and tsunami warning and analysis technologies, and continue to expand the tsunami monitoring and warning capabilities to the global oceans.

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