Tuesday, August 11, 2009

Indian Ocean Tsunami Warning Cancelled

The Pacific Tsunami Warning Center (PTWC) issued a warning for the Indian Ocean at 2005 UTC (bulletin number 1). This followed a 7.7 earthquake near the Andaman Islands. A tsunami was predicted to arrive in towns in the islands within 15 minutes, and on the Indian mainland including KAKINADA within an hour, and later: MYANMAR, INDONESIA, THAILAND, BANGLADESH. The JAPAN METEOROLOGICAL AGENCY (JMA) issued a similar bulletin at 2025. The PTWC issued a second bulletin at 2105Z saying a tsunami was generated, but a third bulletin at 2124Z corrected this saying no tsunami had been observed. At 2211Z PTWC cancelled the Tsunami watch. A problem with this process is the difference in times and details between the Japanese and US warnings. The JMA seems to issue fewer, later and less detailed bulletins.

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Blogger Petra said...

Hi Tom,

Do you have any news directly from the Andaman Islands area as to injuries or damages? If so, please advise.


Petra Challus
Quake Central Forecasting

August 11, 2009 8:52 AM  

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