WEPA40 PHEB 290537

TSUPAC



TSUNAMI MESSAGE NUMBER 4

NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI

0534 UTC WED AUG 29 2018



...PTWC TSUNAMI THREAT MESSAGE...





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 THIS MESSAGE IS ISSUED FOR INFORMATION ONLY IN SUPPORT OF THE

 UNESCO/IOC PACIFIC TSUNAMI WARNING AND MITIGATION SYSTEM AND IS

 MEANT FOR NATIONAL AUTHORITIES IN EACH COUNTRY OF THAT SYSTEM.



 NATIONAL AUTHORITIES WILL DETERMINE THE APPROPRIATE LEVEL OF

 ALERT FOR EACH COUNTRY AND MAY ISSUE ADDITIONAL OR MORE REFINED

 INFORMATION.



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THE TSUNAMI FORECAST IS UPDATED IN THIS MESSAGE.





PRELIMINARY EARTHQUAKE PARAMETERS

---------------------------------



  ? MAGNITUDE      7.1

  ? ORIGIN TIME    0352 UTC AUG 29 2018

  ? COORDINATES    22.1 SOUTH  169.9 EAST

  ? DEPTH          10 KM / 6 MILES

  ? LOCATION       SOUTHEAST OF LOYALTY ISLANDS





EVALUATION

----------



  ? AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 7.1 OCCURRED

    SOUTHEAST OF THE LOYALTY ISLANDS AT 0352 UTC ON WEDNESDAY

    AUGUST 29 2018.



  ? BASED ON ALL AVAILABLE DATA... HAZARDOUS TSUNAMI WAVES ARE

    FORECAST FOR SOME COASTS.





TSUNAMI THREAT FORECAST...UPDATED

---------------------------------



  ? TSUNAMI WAVES REACHING 0.3 TO 1 METERS ABOVE THE TIDE LEVEL

    ARE POSSIBLE FOR SOME COASTS OF



      FIJI... NEW CALEDONIA... AND VANUATU.





  ? TSUNAMI WAVES ARE FORECAST TO BE LESS THAN 0.3 METERS ABOVE

    THE TIDE LEVEL FOR THE COASTS OF



      AMERICAN SAMOA... AUSTRALIA... CHUUK... COOK ISLANDS...