On the problem of local tsunamis and possibilities of their warning
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- 作者：E. V. Sasorova (1)
M. E. Korovin (1)
V. E. Morozov (1)
P. V. Savochkin (1) - 刊名：Oceanology
- 出版年：2008
- 出版时间：October 2008
- 年：2008
- 卷：48
- 期：5
- 页码：634-645
- 全文大小：1058KB
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21. E. Sasorova and B. Levin, 鈥淗ydro-seismic-acoustical Monitoring of Submarine Earthquakes Preparation: Observations and Analysis,鈥?in / Adv. Geosci., 2nd EGU Alexander von Humboldt Conference 鈥淭he Role of Geophysics in Natural Disaster Prevention,鈥?Ed. by P. Fabian and P. Lagos (2008), Vol. 14, pp. 99鈥?04 [p://www.adv-geosci.net/14/99/2008" class="a-plus-plus">www.adv-geosci.net/14/99/2008]. - 作者单位：E. V. Sasorova (1)
M. E. Korovin (1)
V. E. Morozov (1)
P. V. Savochkin (1)
1. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia - ISSN：1531-8508
文摘
At present, the problem of predicting tsunamis with source earthquakes near the shoreline remains practically unresolved. It is shown that, in the Pacific region, 87% of tsunamigenous earthquake epicenters are located closer than 100 km to the shoreline and 67% are closer than 50 km. For a more detailed analysis, the area of the Pacific Ocean was divided into ten subregions: Kamchatka, the Kuril Islands, Japan, Indonesia, Australia and Oceania, South and Central America, Alaska, and the Aleutian Islands. Each subregion was analyzed individually. All the earthquakes from 1950 to 2003 with Ms >= 6.0 causing tsunamis with intensities I > 0 were processed. The ITDB/PAC 2004 database was used as the data source. For each subregion, mean and minimal travel times were calculated. The minimal travel times for all the regions except for a single one are less than 10 min. It is shown that, in the near earthquake zone, no tsunami alert based sea-level gauge data is possible. One probable solution could be based on detecting hydroacoustic signals that precede strong earthquakes in the near-shore zone.