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685
WEHW40 PHEB 200355
TSUHWX
HIZ001>003-005>009-012>014-016>021-023>026-200555-
/O.CON.PHEB.TS.Y.0002.000000T0000Z-000000T0000Z/

TSUNAMI MESSAGE NUMBER   3
NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI
555 PM HST MON OCT 19 2020

TO - EMERGENCY MANAGEMENT IN THE STATE OF HAWAII

SUBJECT - TSUNAMI ADVISORY SUPPLEMENT

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

AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS

   ORIGIN TIME - 1055 AM HST 19 OCT 2020
   COORDINATES - 54.7 NORTH  159.6 WEST
   LOCATION    - SOUTH OF ALASKA
   MAGNITUDE   - 7.5  MOMENT

MEASUREMENTS OR REPORTS OF TSUNAMI WAVE ACTIVITY

 GAUGE LOCATION        LAT   LON    TIME        AMPL         PER
 -------------------  ----- ------  -----  ---------------  -----
 HANALEI HI           22.2N 159.5W  0304Z   0.26M /  0.8FT  18MIN
 NAWILIWILI HI        22.0N 159.4W  0142Z   0.09M /  0.3FT  12MIN
 KAWAIHAE HAWAII      20.0N 155.8W  0205Z   0.05M /  0.2FT  12MIN
 MOKUOLOE OAHU        21.4N 157.8W  0214Z   0.02M /  0.1FT  08MIN
 HILO HI              19.7N 155.1W  0211Z   0.30M /  1.0FT  16MIN
 HALEIWA HI           21.6N 158.1W  0147Z   0.19M /  0.6FT  10MIN
 KAHULUI MAUI         20.9N 156.5W  0200Z   0.38M /  1.2FT  20MIN

 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

 TSUNAMI WAVES HAVE BEEN RECORDED AT HILO AND KAHULUI JUST ABOVE
 ADVISORY LEVEL THAT COULD BE A HAZARD TO SWIMMERS AND BOATERS AS
 WELL AS TO PERSONS NEAR THE SHORE AT BEACHES AND IN HARBORS AND
 MARINAS. THIS HAZARD COULD CONTINUE FOR SEVERAL HOURS. THE
 SITUATION IS BEING MONITORED CLOSELY AND THE ADVISORY WILL END
 WHEN THE HAZARD HAS PASSED.

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

$$