2010年智利地震海啸数值模拟及其对我国沿海的影响分析
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摘要
2010年2月27日06时34分(北京时间14时34分),在智利中南部近岸(36.1°S,72.6°W)发生M_w8.8级地震,并引发了泛太平洋范围的海啸,太平洋沿岸多个国家的验潮站和海啸监测浮标均监测到了强震引发的海啸;海啸波传播25h后到达我国沿海.本文利用海啸数值模型对此次地震海啸进行了数值模拟.重点模拟了我国沿海及智利周边区域海啸波的传播特征,结果与观测数据拟合良好.通过对数值模拟结果的分析,定量阐述了智利海啸对我国沿海地区的影响,给出了此次海啸对我国沿海各海区的危险性分布.
On February 272010,06:34 UTC,a subduction earthquake of magnitude M_w8.8 occurred at the southern-central Coastal Chile,generating a tsunami spreading to the entire Pacific Ocean.The epicenter is located at(36.1°S,72.6°W).An ocean-wide tsunami was triggered soon after the earthquake,which is recorded by tide gauge networks and Deep-ocean Assessment and Reporting of Tsunami(DART) buoys in the Pacific Ocean.The tsunami leading waves arrived in China coasts 25 hours later.The quantitative analysis of this ocean-wide tsunami was studied in detail with numerical tsunami model in this paper.We mainly focus on tsunami propagation scenarios around Chile and China's coastal areas.The simulation results fit well with the observations.Based on the simulation results,the impact of Chile tsunami on China coasts was discussed quantitatively.The evaluation of potential risk along the China coasts was given.
On February 272010,06:34 UTC,a subduction earthquake of magnitude M_w8.8 occurred at the southern-central Coastal Chile,generating a tsunami spreading to the entire Pacific Ocean.The epicenter is located at(36.1°S,72.6°W).An ocean-wide tsunami was triggered soon after the earthquake,which is recorded by tide gauge networks and Deep-ocean Assessment and Reporting of Tsunami(DART) buoys in the Pacific Ocean.The tsunami leading waves arrived in China coasts 25 hours later.The quantitative analysis of this ocean-wide tsunami was studied in detail with numerical tsunami model in this paper.We mainly focus on tsunami propagation scenarios around Chile and China's coastal areas.The simulation results fit well with the observations.Based on the simulation results,the impact of Chile tsunami on China coasts was discussed quantitatively.The evaluation of potential risk along the China coasts was given.
引文
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[15]Satake K.海啸.世界地震译丛.薛艳译,2006,3:59-75 Satake K.Tsunamis.Translated by Xue Y.Translated World Seismology(in Chinese),2006,3:59 - 75
[16]Peter M Shearer著.地震学引论.陈章立译.北京:地震出版社,2008 Peter M Shearer.Introduction to Seismology(in Chinese). Chen Z L translated.Beijing:Seismological Press,2008
[2]UNESCO-IOC.Tsunami Glossary.IOC information document O.1221.Paris,UNESCO,2006
[3]温瑞智,任叶飞,周正华等.越洋海啸的数值模拟.地震工程与工程振动,2008,28(4):28-34 Wen R Z,Ren Y F,Zhou Z H,et al.Preliminary study on numerical simulation of transoceanic tsunami.Journal of ??Earthquake Engineering and Engineering Vibration(in Chinese),2008,28(4):28-34
[4]包澄澜.海啸灾害及其预警系统.国际地震动态,2005,313 (1):14-18 Bao C L.Tsunami disaster and its re-warning system.Recent Development in World Seismology(in Chinese),2005,313 (1):14-18
[5]包澄澜,叶琳.海啸灾害与预警.海洋预报,2005,22(1): 1-4 Bao C L,Ye L.Tsunami disaster and it's warning.Marine Forecasts(in Chinese),2005,22(1):1-4
[6]郭增建,陈鑫连.地震对策.北京:地震出版社,1986 Guo Z J,Chen X L.Earthquake Countermeasure.Beijing: Seismological Press,1986
[7]王晓青,吕金霞,丁香.我国地震海啸危险性初步探讨.华南地震,2006,26(1):76-80 Wang X Q,L(u|¨) J X,Ding X.A preliminary study on the risk of tsunami in China.South China Journal of Seismology(in Chinese),2006,26(1):76-80
[8]任叶飞.基于数值模拟的我国地震海啸危险性分析研究[博士论文].哈尔滨:中国地震局工程力学研究所,2007 Ren Y F.Study on China earthquake tsunami hazard analysis based on numerical simulation[Ph.D.theses](in Chinese). Harbin:Institute of Engineering Mechanics,China Earthquake Administration,2007
[9]付庆军.越洋和局地海啸数值模拟的理论研究及其应用[博士论文].天津:天津大学,2006 Fu Q J.Research on theory and application of trans -oceanic tsunami and local tsunami numerical simulation[Ph.D. theses](in Chinese).TianJin:TianJin University,2006
[10]Mansinha L,Smylie D E.The displacement fields of inclined faults.Bulletin of the Seismological Society of America, 1971,61(5):1433-1440
[11]Okada Y.Surface deformation due to shear and tensile faults in a half-space.Bulletin of the Seismological Society of America,1985,75(4),113-1154
[12]Leveque R J.Wave propagation algorithms for multi dimensional hyperbolic systems.Journal of Computational Physics,1997,131:327-335
[13]叶琳,王喜年,包澄澜.中国的地震海啸及其预警服务.自然灾害学报,1994,3(1):100-103 Ye L,Wang X N,Bao C L.Tsunami in the China Seas and its warning service.Journal of Natural Disasters(in Chinese), 1994,3(1):100-103
[14]郭彩玲,王晓峰.中国东部海域发生海啸的可能性分析.自然灾害学报,2007,16(1):7-11 Guo C L,Wang X F.Possibility analysis of tsunami taking place in east sea area of China.Journal of Natural Disasters (in Chinese),2007,16(1):7-11
[15]Satake K.海啸.世界地震译丛.薛艳译,2006,3:59-75 Satake K.Tsunamis.Translated by Xue Y.Translated World Seismology(in Chinese),2006,3:59 - 75
[16]Peter M Shearer著.地震学引论.陈章立译.北京:地震出版社,2008 Peter M Shearer.Introduction to Seismology(in Chinese). Chen Z L translated.Beijing:Seismological Press,2008
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