Tsunami Watch/Warning
Issued by NWS Pago Pago

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WEZS40 PHEB 042216
TSUPPG

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BULLETIN
TSUNAMI MESSAGE NUMBER 4
NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI
1116 AM SST THU MAR 04 2021

...THE TSUNAMI ADVISORY IS NOW CANCELED FOR AMERICAN SAMOA...

IN THIS MESSAGE ARE REVISED ALERTS.


AUDIENCE
--------
EMERGENCY MANAGERS... MEDIA... GENERAL PUBLIC


EVALUATION
----------

  * AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 8.1 OCCURRED IN
    THE KERMADEC ISLANDS REGION AT 828 AM SST ON THURSDAY MARCH
    4 2021.

  * A TSUNAMI WAS GENERATED BY THIS EARTHQUAKE.

  * ALL AVAILABLE DATA NOW INDICATE THAT THE TSUNAMI THREAT HAS
    PASSED ALTHOUGH SMALL SEA LEVEL FLUCTUATIONS MAY CONTINUE.

  * BASED ON ALL AVAILABLE DATA... THERE IS NO FURTHER TSUNAMI
    THREAT TO AMERICAN SAMOA FROM THIS EARTHQUAKE ALTHOUGH MINOR
    SEA LEVEL FLUCTUATIONS MAY CONTINUE.


RECOMMENDED ACTIONS
-------------------

  * DO NOT RETURN TO EVACUATED AREAS UNTIL THE ALL CLEAR IS GIVEN
    BY LOCAL AUTHORITIES.

  * FOLLOW ANY INSTRUCTIONS FROM GOVERNMENT AGENCIES.

  * BE OBSERVANT AND EXERCISE NORMAL CAUTION IF YOU ARE NEAR OR
    IN THE OCEAN.

  * OTHERWISE... NO FURTHER ACTION IS REQUIRED.


TSUNAMI OBSERVATIONS
--------------------

  * THE FOLLOWING ARE TSUNAMI WAVE OBSERVATIONS FROM COASTAL
    AND/OR DEEP-OCEAN SEA LEVEL GAUGES AT THE INDICATED
    LOCATIONS. THE MAXIMUM TSUNAMI HEIGHT IS MEASURED WITH
    RESPECT TO THE TIDE LEVEL.

                            GAUGE      TIME OF   MAXIMUM     WAVE
                         COORDINATES   MEASURE   TSUNAMI   PERIOD
    GAUGE LOCATION        LAT   LON     (SST)     HEIGHT    (MIN)
    -------------------------------------------------------------
    NUKUALOFA TO         21.1S 175.2W  1029 AM   0.2FT/ 0.0M  30


POTENTIAL IMPACTS
-----------------

  * MINOR SEA LEVEL FLUCTUATIONS MAY CONTINUE OVER THE NEXT FEW
    HOURS.


PRELIMINARY EARTHQUAKE PARAMETERS
---------------------------------

  * MAGNITUDE      8.1
  * ORIGIN TIME    828 AM SST MAR 04 2021
  * COORDINATES    29.6 SOUTH  176.0 WEST
  * DEPTH          6 MILES
  * LOCATION       KERMADEC ISLANDS REGION


NEXT UPDATE AND ADDITIONAL INFORMATION
--------------------------------------

  * THIS WILL BE THE FINAL STATEMENT ISSUED FOR THIS EVENT UNLESS
    NEW INFORMATION IS RECEIVED OR THE SITUATION CHANGES.

  * FURTHER INFORMATION ABOUT THIS EVENT MAY BE FOUND ON THE
    INTERNET AT WWW.TSUNAMI.GOV.

  * AUTHORITATIVE INFORMATION ABOUT THE EARTHQUAKE FROM THE U.S.
    GEOLOGICAL SURVEY CAN BE FOUND ON THE INTERNET AT
    EARTHQUAKE.USGS.GOV.

$$


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