387
WEHW40 PHEB 300439
TSUHWX

HIZ001-003-006>007-009-016>018-023-026-029>035-037>050-051>054-
300639-
/O.CON.PHEB.TS.W.0001.000000T0000Z-000000T0000Z/

BULLETIN
TSUNAMI MESSAGE NUMBER   6
NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
639 PM HST TUE JUL 29 2025

TO - EMERGENCY MANAGEMENT IN THE STATE OF HAWAII

SUBJECT - TSUNAMI WARNING SUPPLEMENT

A TSUNAMI WARNING CONTINUES IN EFFECT FOR THE STATE OF HAWAII.

AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS

   ORIGIN TIME - 0125 PM HST 29 JUL 2025
   COORDINATES - 52.2 NORTH  160.0 EAST
   LOCATION    - OFF THE EAST COAST OF KAMCHATKA  RUSSIA
   MAGNITUDE   - 8.7  MOMENT

MEASUREMENTS OR REPORTS OF TSUNAMI WAVE ACTIVITY

 GAUGE LOCATION        LAT   LON    TIME        AMPL         PER
 -------------------  ----- ------  -----  ---------------  -----
 CHICHIJIMA JP        27.1N 142.2E  0357Z   0.29M /  1.0FT  16MIN
 WAKE US              19.3N 166.6E  0402Z   0.22M /  0.7FT  14MIN
 MIDWAY               28.2N 177.4W  0328Z   0.31M /  1.0FT  44MIN
 ATKA AK              52.2N 174.2W  0322Z   0.31M /  1.0FT  68MIN
 HANASAKI HOKKAIDO J  43.3N 145.6E  0158Z   0.32M /  1.0FT  58MIN
 DART 46413           48.0N 174.2W  0144Z   0.19M /  0.6FT  40MIN
 KUSHIRO JP           43.0N 144.4E  0121Z   0.33M /  1.1FT  76MIN
 DART 21415           50.2N 171.9E  0117Z   0.20M /  0.6FT  08MIN
 DART 21414           49.0N 178.2E  0103Z   0.28M /  0.9FT  32MIN
 DART 21416           48.1N 163.5E  0003Z   0.90M /  3.0FT  24MIN

 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.

 NOTE - DART MEASUREMENTS ARE FROM THE DEEP OCEAN AND THEY
        ARE GENERALLY MUCH SMALLER THAN WOULD BE COASTAL
         MEASUREMENTS AT SIMILAR LOCATIONS.

EVALUATION

 A TSUNAMI HAS BEEN GENERATED THAT COULD CAUSE DAMAGE ALONG
 COASTLINES OF ALL ISLANDS IN THE STATE OF HAWAII. URGENT ACTION
 SHOULD BE TAKEN TO PROTECT LIVES AND PROPERTY.

 A TSUNAMI IS A SERIES OF LONG OCEAN WAVES. EACH INDIVIDUAL WAVE
 CREST CAN LAST 5 TO 15 MINUTES OR MORE AND EXTENSIVELY FLOOD
 COASTAL AREAS. THE DANGER CAN CONTINUE FOR MANY HOURS AFTER THE
 INITIAL WAVE AS SUBSEQUENT WAVES ARRIVE. TSUNAMI WAVE HEIGHTS
 CANNOT BE PREDICTED AND THE FIRST WAVE MAY NOT BE THE LARGEST.
 TSUNAMI WAVES EFFICIENTLY WRAP AROUND ISLANDS. ALL SHORES ARE AT
 RISK NO MATTER WHICH DIRECTION THEY FACE. THE TROUGH OF A TSUNAMI
 WAVE MAY TEMPORARILY EXPOSE THE SEAFLOOR BUT THE AREA WILL
 QUICKLY FLOOD AGAIN. EXTREMELY STRONG AND UNUSUAL NEARSHORE
 CURRENTS CAN ACCOMPANY A TSUNAMI. DEBRIS PICKED UP AND CARRIED
 BY A TSUNAMI AMPLIFIES ITS DESTRUCTIVE POWER. SIMULTANEOUS HIGH
 TIDES OR HIGH SURF CAN SIGNIFICANTLY INCREASE THE TSUNAMI HAZARD.

 THE ESTIMATED ARRIVAL TIME IN HAWAII OF THE FIRST TSUNAMI WAVE IS

                     0717 PM HST TUE 29 JUL 2025

FURTHER MESSAGES WILL BE ISSUED HOURLY OR SOONER AS CONDITIONS
WARRANT UNTIL THE THREAT TO HAWAII HAS PASSED.

$$