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- Oct 20, 2020
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Earthquake Information Update # 2 for October 19th, 2020

A Tsunami Advisory for the Island of Hawaii has been canceled as of 6:58 pm Monday evening (October 19th).

Published by: HIRSC - Weather Team

The Pacific Tsunami Warning Center (PTWC) for reports the Tsunami Advisory for the Island of Hawaii has been canceled or ended as of 6:58 pm Monday evening (October 19th).

No damage or injuries have been reported to the Hawaii Fire Department (HFD), Hawaii Police Department (HPD), and Hawaii County Civil Defense on Hawaii Island. Moderate tide changes were reported around the Hilo Bay area and minor tidal changes were reported at Kawaihae Harbor in South Kohala and Honokohau Harbor in North Kona.

While the event has ended, some minor sea-level changes and strong and unusual changes may persist for some coastal areas and for the next several hours. Swimmers and boaters are being asked to use caution while in the water.

This will be the final message for this event unless further data is received.

We have also sent an inquiry to PTWC regarding the delayed message and waiting for a reply. We will post that statement, once that becomes available.

TSUNAMI MESSAGE NUMBER   4
NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI
701 PM HST MON OCT 19 2020

TO - EMERGENCY MANAGEMENT IN THE STATE OF HAWAII

SUBJECT - FINAL TSUNAMI ADVISORY

THE TSUNAMI ADVISORY IS ENDED FOR THE STATE OF HAWAII EFFECTIVE
AT 0658 PM HST.

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
 -------------------  ----- ------  -----  ---------------  -----
 KAHULUI MAUI         20.9N 156.5W  0346Z   0.13M /  0.4FT  20MIN
 HILO HI              19.7N 155.1W  0211Z   0.28M /  0.9FT  16MIN
 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
 HALEIWA HI           21.6N 158.1W  0147Z   0.19M /  0.6FT  10MIN

 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 WAVE HEIGHTS ACROSS THE STATE OF HAWAII ARE NOW BELOW
 ADVISORY LEVELS AND ARE CONTINUING TO DIMINISH. MEASUREMENTS
 RECORDED FOR KAHULUI AND HILO ARE NOW BELOW ADVISORY LEVEL.
 BASED ON ALL AVAILABLE DATA THE PACIFIC TSUNAMI WARNING CENTER
 IS NOW CANCELLING THE TSUNAMI ADVISORY. SMALL SEA LEVEL CHANGES
 AND STRONG OR UNUSUAL CURRENTS MAY PERSIST FOR SEVERAL ADDITIONAL
 HOURS IN SOME COASTAL AREAS AND APPROPRIATE CAUTION SHOULD BE
 EXERCISED BY BOATERS AND SWIMMERS.

THIS WILL BE THE FINAL MESSAGE ISSUED FOR THIS EVENT UNLESS
ADDITIONAL DATA ARE RECEIVED.

Earthquake Information Update # 2 for October 19th, 2020

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