鹰眼看世界分享 http://blog.sciencenet.cn/u/ywang69 西南交通大学王鹰灌水自留地,欢迎新老朋友光顾!

博文

来自美国地质调查局(USGS)的报道

已有 3844 次阅读 2008-5-15 16:16 |个人分类:英语交流|系统分类:海外观察

Magnitude 7.9 - EASTERN SICHUAN, CHINA

2008 May 12 06:28:01 UTC (from USGS website)

Earthquake Details

Magnitude 7.9
Date-Time
Location 31.015°N, 103.365°E
Depth 19 km (11.8 miles) set by location program
Region EASTERN SICHUAN, CHINA
Distances 75 km (50 miles) WNW of Chengdu, Sichuan, China
145 km (90 miles) WSW of Mianyang, Sichuan, China
345 km (215 miles) WNW of Chongqing, Chongqing, China
1545 km (960 miles) SW of BEIJING, Beijing, China
Location Uncertainty horizontal +/- 4.6 km (2.9 miles); depth fixed by location program
Parameters NST=236, Nph=236, Dmin=592.4 km, Rmss=1.19 sec, Gp= 25°,
M-type=moment magnitude (Mw), Version=A
Source
  • USGS NEIC (WDCS-D)
Event ID us2008ryan

  • This event has been reviewed by a seismologist.
  • Earthquake Summary

    Small globe showing earthquakeSmall map showing earthquake

    Earthquake Summary Poster 

  • The following is a release by the United States Geological Survey, National Earthquake Information Center: An earthquake occurred 90 km (55 miles) WNW of Chengdu, Sichuan, China and 1545 km (960 miles) SW of BEIJING, Beijing, China at 12:28 AM MDT, May 12, 2008 (2:28 PM local time in China). The magnitude and location may be revised when additional data and further analysis results are available.  

    Felt Reports 

    At least 12,000 people killed and severe damage in the Dujiangyan-Mianzhu-Mianyang area. Landslides blocked roads and buried buildings in the Beichuan-Wenchuan area. Felt (VII) at Chengdu, (VI) at Xi'an and (V) at Chongqing and Lanzhou. Felt in much of central, eastern and southern China, including Beijing, Guangzhou, Nanjing, Shanghai, Tianjin, Wuhan and in Hong Kong. Also felt in parts of Bangladesh, Taiwan, Thailand and Vietnam. 

  •  Tectonic Summary 

    The Sichuan earthquake of May 12, 2008, occurred as the result of motion on a northeast striking reverse fault or thrust fault on the northwestern margin of the Sichuan Basin. The earthquake's epicenter and focal-mechanism are consistent with it having occurred as the result of movement on the Longmenshan fault or a tectonically related fault. The earthquake reflects tectonic stresses resulting from the convergence of crustal material slowly moving from the high Tibetan Plateau, to the west, against strong crust underlying the Sichuan Basin and southeastern China.

    On a continental scale, the seismicity of central and eastern Asia is a result of northward convergence of the India plate against the Eurasia plate with a velocity of about 50 mm/y. The convergence of the two plates is broadly accommodated by the uplift of the Asian highlands and by the motion of crustal material to the east away from the uplifted Tibetan Plateau.

    The northwestern margin of the Sichuan Basin has previously experienced destructive earthquakes. The magnitude 7.5 earthquake of August 25, 1933, killed more than 9,300 people.

  • 关键词中文:USGS/美国地质调查局;epicenter/震中,Magnitude/震级,focal-mechanism/震源机制

    India plate /印度板块,Eurasia plate /欧亚板块,Tibetan Plateau/西藏高原,reverse fault /逆断层,thrust fault /逆冲断层,landslides/滑坡,

  • Longmenshan fault /龙门山断层,tectonic stress/构造应力



http://blog.sciencenet.cn/blog-39176-25346.html

上一篇:手机照片:西南交大师生抗震避灾纪实
下一篇:地震可能影响成都/彭州经济的几件大事

0

发表评论 评论 (2 个评论)

数据加载中...

Archiver|手机版|科学网 ( 京ICP备14006957 )

GMT+8, 2019-7-17 04:18

Powered by ScienceNet.cn

Copyright © 2007- 中国科学报社

返回顶部