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智利发生M8.8级特大地震

已有 6829 次阅读 2010-2-27 16:44 |个人分类:地球科学|系统分类:博客资讯|关键词:地震| 地震

 

 

廖永岩

广东海洋大学

电话信箱:rock6783@126.com

智利时间2010227(星期六)03:34:14(北京时间2010227日14:34:14),美国地质勘探局称,位于智利比奥比奥省(BIO-BIO)康塞普西翁(Concepcion)东北89公里35.846°S, 72.719°W)发生M8.8级地震强烈地震(初报为M8.3级,后改为M8.5级,现修正为M8.8级),震源深度35公里在2010年2月26日下午11:52(PST),已发出海啸警报。位于夏威夷的太平洋海啸预警中心报告,智利27日发生的强烈地震已经引发一次海啸,可能对震中附近的智利海岸产生破坏。325公里外的智利首都圣地亚哥有震感,楼房摇晃10至30秒,造成部分城市停电。这次特大地震震级较大,震源深度较浅,属于浅源性地震,地震造成的破坏力应比较大。因当地目前仍在夜色中,伤亡情况不详,但至少已造成6人死亡。M6级以上的余震仍在继续。

 

资料信息:

http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/us2010tfan.html

 

Magnitude 8.8 - OFFSHORE MAULE, CHILE

2010 February 27 06:34:14 UTC

Earthquake Details

Magnitude

8.8

Date-Time

Location

35.846°S, 72.719°W

Depth

35 km (21.7 miles) set by location program

Region

OFFSHORE MAULE, CHILE

Distances

100 km (60 miles) NNW of Chillan, Chile
105 km (65 miles) WSW of Talca, Chile
115 km (70 miles) NNE of Concepcion, Chile
325 km (200 miles) SW of SANTIAGO, Chile

Location Uncertainty

horizontal +/- 7.2 km (4.5 miles); depth fixed by location program

Parameters

NST=255, Nph=255, Dmin=988 km, Rmss=1.12 sec, Gp= 36°,
M-type=teleseismic moment magnitude (Mw), Version=7

Source

  • USGS NEIC (WDCS-D)

Event ID

us2010tfan

 

海啸警报:

http://wcatwc.arh.noaa.gov/2010/02/27/725245/02/message725245-02.htm

 

To: U.S. West Coast, Alaska, and British Columbia coastal regions
From:
NOAA/NWS/West Coast and Alaska Tsunami Warning Center
Subject: Tsunami Information Statement #2 issued 02/26/2010 at 11:52PM PST

A strong earthquake has occurred, but a tsunami IS NOT expected along the California, Oregon, Washington, British Columbia, or Alaska coast. NO tsunami warning, watch or advisory is in effect for these areas.

A tsunami has been generated that could potentially impact the U.S. west coast, British Columbia, and Alaska. The West Coast/Alaska Tsunami Warning Center is investigating the event to determine the level of danger. More information will be issued as it becomes available.

A tsunami has been observed at the following sites:

 Location                   Lat.   Lon.    Time        Amplitude
 ------------------------  -----  ------  -------     -----------

 83min     Talcahuano  C   36.7S   73.1W  0716UTC      1.15M/3.8FT

 45min     Valparaiso  C   33.0S   71.4W  0706UTC      1.29M/4.2FT

           Juan Ferdandez C 33.617S 78.83W             0.19M/0.6FT

Time - Time of measurement.
Amp. - Tsunami amplitudes are measured relative to normal sea level. It is NOT crest-to-trough wave height. Values are given in both meters (M) and feet (FT).

At 10:34 PM Pacific Standard Time on February 26, an
earthquake with preliminary magnitude 8.6 (REVISED FROM 8.5) occurred near the coast of central Chile . (Refer to the United States Geological Survey for official earthquake parameters.)

The
Pacific Tsunami Warning Center in Ewa Beach, Hawaii will issue a tsunami warning for regions near the epicenter.

Messages will continue to be issued hourly by the WCATWC until the event status is upgraded to a warning or advisory, or until the center has determined that the event poses no threat to the California, Oregon, Washington, British Columbia, and Alaska coasts. See the
WCATWC web site for basic tsunami information, safety rules, and a tsunami travel time map and table. (NOTE: Travel time maps and tables indicate forecasted times only, not that a wave dangerous to the U.S. and Canadian coasts was generated.)

Link to Standard Information Statement
Link to Public Information Statement
Link to XML/CAP Message
Link to Printable Message

 









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