Tsunami Warning April 11 2012

After a M8.7 earthquake off the cost of Northern Sumatra and issue of a Tsunami Warning for the whole of the Indian Ocean, the warning has finally been lifted with the follwing additional message.
Thanks to Pacific Tsunami Warning Center 
http://ptwc.weather.gov/ptwc/text.php?id=indian.TSUIOX.2012.04.11.1318

EVALUATION
A SIGNIFICANT TSUNAMI WAS GENERATED BY THIS EARTHQUAKE. HOWEVER...SEA LEVEL READINGS NOW INDICATE THAT THE THREAT HAS DIMINISHED OR IS OVER FOR MOST AREAS. THEREFORE THE TSUNAMI WATCH ISSUED BY THIS CENTER IS NOW CANCELLED.

FOR ANY AFFECTED AREAS - WHEN NO MAJOR WAVES HAVE OCCURRED FOR AT LEAST TWO HOURS AFTER THE ESTIMATED ARRIVAL TIME OR DAMAGING WAVES HAVE NOT OCCURRED FOR AT LEAST TWO HOURS THEN LOCAL AUTHORITIES CAN ASSUME THE THREAT IS PASSED. DANGER TO BOATS AND COASTAL STRUCTURES CAN CONTINUE FOR SEVERAL HOURS DUE TO RAPID CURRENTS. AS LOCAL CONDITIONS CAN CAUSE A WIDE VARIATION IN TSUNAMI WAVE ACTION THE ALL CLEAR DETERMINATION MUST BE MADE BY LOCAL AUTHORITIES.


THIS WILL BE THE FINAL BULLETIN ISSUED BY THE PACIFIC TSUNAMI WARNING CENTER FOR THIS EVENT UNLESS ADDITIONAL INFORMATION BECOMES AVAILABLE.

THE JAPAN METEOROLOGICAL AGENCY MAY ISSUE ADDITIONAL INFORMATION FOR THIS EVENT. IN THE CASE OF CONFLICTING INFORMATION...THE MORE CONSERVATIVE INFORMATION SHOULD BE USED FOR SAFETY.


For a regional map showing latest earthquakes in real time follow this link to USGS website.


Some detailed scientific information regarding the Sumatra earthquake can be seen at the following websites:


http://earthquake.usgs.gov/earthquakes/eventpage/usc000905e#summary

http://www.seismology.harvard.edu/research_sumatra2012.html

http://www.earthobservatory.sg/media/news-and-features/Sumatra_Earthquake_11Apr2012.html


3 comments:

  1. I am comin to phuket on the 26/08/201 &stayin for 8 dayys, is there any threat for a tsunami to iccur?

    ReplyDelete
  2. Thanks for your comment. Tsunamis can occur anywhere any time and it is impossible to forecast them. They can be caused by earthquake, volcanic eruptions or landsides. Therefore it is impossible to say that there will be a tsunami when you are here in Phuket or not. It would be like trying to predict if your plane will crash or not! However in the event of a tsunami we now have advance warning systems, alarms and evacuation routes which we didn't have back in 2004.

    It is very unlikely and all the people in Phuket live and sleep here without worrying about it. Come over and enjoy paradise!

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