000
WEZS40 PHEB 111220
TSUPPG

ASZ001>003-111420-


BULLETIN
TSUNAMI MESSAGE NUMBER 4
NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
120 AM SST FRI NOV 11 2022

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


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


EVALUATION
----------

  * AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 7.3 OCCURRED IN
    THE TONGA ISLANDS REGION AT 1149 PM SST ON THURSDAY NOVEMBER
    10 2022.

  * SOME AREAS MAY HAVE EXPERIENCED STRONG SHAKING.

  * 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  1251 AM   0.1FT/ 0.0M  16
    PAGO PAGO AS         14.3S 170.7W  1250 AM   0.4FT/ 0.1M  12


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

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


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

  * MAGNITUDE      7.3
  * ORIGIN TIME    1149 PM SST NOV 10 2022
  * COORDINATES    19.3 SOUTH  172.1 WEST
  * DEPTH          36 MILES
  * LOCATION       TONGA 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.

$$