TSUNAMI BULLETIN NUMBER 002
PACIFIC TSUNAMI WARNING CENTER/NOAA/NWS
ISSUED AT 2322Z 06 APR 2010

THIS BULLETIN IS FOR ALL AREAS OF THE INDIAN OCEAN.

... A LOCAL TSUNAMI WATCH IS IN EFFECT ...

A TSUNAMI WATCH IS IN EFFECT FOR

 INDONESIA

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 -  2215Z 06 APR 2010
 COORDINATES -   2.4 NORTH   97.2 EAST 
 LOCATION    -  NORTHERN SUMATRA  INDONESIA
 MAGNITUDE   -  7.5

MEASUREMENTS OR REPORTS OF TSUNAMI WAVE ACTIVITY

 GAUGE LOCATION        LAT   LON    TIME        AMPL         PER
 -------------------  ----- ------  -----  ---------------  -----
 TELUKDALAM ID         0.6N  97.8E  2301Z   0.14M /  0.5FT  16MIN

 LAT  - LATITUDE (N-NORTH, S-SOUTH)
 LON  - LONGITUDE (E-EAST, W-WEST)
 TIME - TIME OF THE MEASUREMENT (Z IS UTC IS GREENWICH TIME)
 AMPL - TSUNAMI AMPLITUDE MEASURED RELATIVE TO NORMAL SEA LEVEL.
        IT IS ...NOT... CREST-TO-TROUGH WAVE HEIGHT.
        VALUES ARE GIVEN IN BOTH METERS(M) AND FEET(FT).
 PER  - PERIOD OF TIME IN MINUTES(MIN) FROM ONE WAVE TO THE NEXT.

EVALUATION

 SEA LEVEL READINGS INDICATE A TSUNAMI WAS GENERATED. IT MAY HAVE    
 BEEN DESTRUCTIVE ALONG COASTS NEAR THE EARTHQUAKE EPICENTER. FOR    
 THOSE AREAS - WHEN 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.                                  
                                                                     
 NO TSUNAMI THREAT EXISTS FOR OTHER COASTAL AREAS IN THE INDIAN      
 OCEAN ALTHOUGH SOME OTHER AREAS MAY EXPERIENCE SMALL SEA LEVEL      
 CHANGES AND STRONG OR UNUSUAL COASTAL CURRENTS.                     

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
 --------------------------------    ------------    ------------
 INDONESIA        SIMEULUE            2.5N  96.0E    2246Z 06 APR
                  BELAWAN             3.8N  98.8E    0233Z 07 APR

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.