Re: 7.9 earthquake - West Sumatra - Tsunami warning
Re: 7.9 earthquake - West Sumatra - Tsunami warning
TSUNAMI BULLETIN NUMBER 001
PACIFIC TSUNAMI WARNING CENTER/NOAA/NWS
ISSUED AT 1026Z 30 SEP 2009
THIS BULLETIN IS FOR ALL AREAS OF THE INDIAN OCEAN.
... A REGIONAL TSUNAMI WATCH IS IN EFFECT ...
A TSUNAMI WATCH IS IN EFFECT FOR
INDONESIA / INDIA / THAILAND / MALAYSIA
FOR OTHER AREAS OF THE INDIAN OCEAN REGION...THIS MESSAGE IS FOR
INFORMATION ONLY AT THIS TIME.
THIS BULLETIN IS ISSUED AS ADVICE TO GOVERNMENT AGENCIES. ONLY
NATIONAL AND LOCAL GOVERNMENT AGENCIES HAVE THE AUTHORITY TO MAKE
DECISIONS REGARDING THE OFFICIAL STATE OF ALERT IN THEIR AREA AND
ANY ACTIONS TO BE TAKEN IN RESPONSE.
AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS
ORIGIN TIME - 1016Z 30 SEP 2009
COORDINATES - 0.9 SOUTH 99.9 EAST
LOCATION - SOUTHERN SUMATRA INDONESIA
MAGNITUDE - 7.7
EVALUATION
EARTHQUAKES OF THIS SIZE HAVE THE POTENTIAL TO GENERATE A
DESTRUCTIVE LOCAL TSUNAMI AND SOMETIMES A DESTRUCTIVE REGIONAL
TSUNAMI ALONG COASTS LOCATED USUALLY NO MORE THAN A THOUSAND
KILOMETERS FROM THE EARTHQUAKE EPICENTER. AREAS FURTHER FROM THE
EPICENTER COULD EXPERIENCE SMALL SEA LEVEL CHANGES AND STRONG OR
UNUSUAL COASTAL CURRENTS.
HOWEVER -
IT IS NOT KNOWN THAT A TSUNAMI WAS GENERATED. THIS
WATCH IS BASED ONLY ON THE EARTHQUAKE EVALUATION. AUTHORITIES IN
THE REGION SHOULD TAKE APPROPRIATE ACTION IN RESPONSE TO THIS
POSSIBILITY. THE WATCH WILL NOT EXPAND TO OTHER AREAS OF THE
INDIAN OCEAN UNLESS ADDITIONAL DATA ARE RECEIVED TO WARRANT SUCH
AN EXPANSION.
ESTIMATED INITIAL TSUNAMI WAVE ARRIVAL TIMES AT FORECAST POINTS
WITHIN THE WARNING AND WATCH AREAS ARE GIVEN BELOW. ACTUAL
ARRIVAL TIMES MAY DIFFER AND THE INITIAL WAVE MAY NOT BE THE
LARGEST. A TSUNAMI IS A SERIES OF WAVES AND THE TIME BETWEEN
SUCCESSIVE WAVES CAN BE FIVE MINUTES TO ONE HOUR.
LOCATION FORECAST POINT COORDINATES ARRIVAL TIME
-------------------------------- ------------ ------------
Code:
INDONESIA PADANG 0.9S 100.1E 1022Z 30 SEP
SIBERUT 1.5S 98.7E 1103Z 30 SEP
BENGKULU 3.9S 102.0E 1125Z 30 SEP
SIMEULUE 2.5N 96.0E 1136Z 30 SEP
BANDA ACEH 5.5N 95.1E 1227Z 30 SEP
BANDAR LAMPUNG 5.7S 105.3E 1251Z 30 SEP
BELAWAN 3.8N 98.8E 1531Z 30 SEP
INDIA GREAT NICOBAR 7.1N 93.6E 1236Z 30 SEP
THAILAND PHUKET 8.0N 98.2E 1400Z 30 SEP
KO PHRA THONG 9.1N 98.2E 1444Z 30 SEP
KO TARUTAO 6.6N 99.6E 1512Z 30 SEP
MALAYSIA GEORGETOWN 5.4N 100.1E 1546Z 30 SEP
PORT DICKSON 2.5N 101.7E 1918Z 30 SEP
ADDITIONAL BULLETINS WILL BE ISSUED BY THE PACIFIC TSUNAMI
WARNING CENTER FOR THIS EVENT AS MORE 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.
http://www.prh.noaa.gov/ptwc/messages/indian/2009/indian.2009.09.30.102622.txt