8/14/2019 Bulletin Tsunami Message Number 17 Nws Pacific

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BULLETINTSUNAMI MESSAGE NUMBER 17NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI1025 AM HST SAT FEB 27 2010

TO - CIVIL DEFENSE 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 - 0834 PM HST 26 FEB 2010COORDINATES - 36.1 SOUTH 72.6 WESTLOCATION - NEAR COAST OF CENTRAL CHILEMAGNITUDE - 8.8 MOMENT

MEASUREMENTS OR REPORTS OF RECENT TSUNAMI WAVE ACTIVITY

GAUGE LOCATION LAT LON TIME AMPL PER------------------- ----- ------ ----- --------------- -----LOTTIN PT NZ 37.6S 178.2E 1934Z 0.15M / 0.5FT 10MINRAROTONGA CK 21.2S 159.8W 1918Z 0.32M / 1.0FT 06MINCABO SAN LUCAS MX 22.9N 109.9W 1833Z 0.36M / 1.2FT 12MINDART TONGA 51426 23.0S 168.1W 1844Z 0.04M / 0.1FT 30MINHIVA OA MARQUESAS 9.8S 139.0W 1741Z 1.79M / 5.9FT 12MINPAPEETE TAHITI 17.5S 149.6W 1810Z 0.16M / 0.5FT 10MINNUKU HIVA MARQUESAS 8.9S 140.1W 1745Z 0.95M / 3.1FT 04MINMANZANILLO MX 19.1N 104.3W 1705Z 0.32M / 1.0FT 24MINDART MANZANILLO 434 16.0N 107.0W 1611Z 0.07M / 0.2FT 24MINACAPULCO MX 16.8N 99.9W 1549Z 0.16M / 0.5FT 24MIN

RIKITEA PF 23.1S 134.9W 1559Z 0.15M / 0.5FT 22MIN

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.

CURRENT RANGE OF FORECAST INITIAL WAVE ARRIVAL TIME AND MAXIMUMWAVE AMPLITUDES MEASURED FROM CREST TO TROUGH.

HILO 1105AM HST 2.1-2.5 METERSHONOLULU 1137AM HST 0.5-0.7 METERSKAHULUI 1126AM HST 1.1-3.0 METERSNAWILIWILI 1142AM HST 0.9-1.4 METERSHALEIWA 0.5-1.1 METERSKAWAIHAE 0.6-1.6 METERS

THESE ARE ONLY ESTIMATES...ACTUAL VALUES MAY DIFFER.

EVALUATION

A TSUNAMI HAS BEEN GENERATED THAT COULD CAUSE DAMAGE ALONG

COASTLINES OF ALL ISLANDS IN THE STATE OF HAWAII. URGENT ACTIONSHOULD BE TAKEN TO PROTECT LIVES AND PROPERTY.

8/14/2019 Bulletin Tsunami Message Number 17 Nws Pacific

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A TSUNAMI IS A SERIES OF LONG OCEAN WAVES. EACH INDIVIDUAL WAVECREST CAN LAST 5 TO 15 MINUTES OR MORE AND EXTENSIVELY FLOODCOASTAL AREAS. THE DANGER CAN CONTINUE FOR MANY HOURS AFTER THEINITIAL WAVE AS SUBSEQUENT WAVES ARRIVE. TSUNAMI WAVE HEIGHTSCANNOT BE PREDICTED AND THE FIRST WAVE MAY NOT BE THE LARGEST.TSUNAMI WAVES EFFICIENTLY WRAP AROUND ISLANDS. ALL SHORES ARE ATRISK NO MATTER WHICH DIRECTION THEY FACE. THE TROUGH OF A TSUNAMI

WAVE MAY TEMPORARILY EXPOSE THE SEAFLOOR BUT THE AREA WILLQUICKLY FLOOD AGAIN. EXTREMELY STRONG AND UNUSUAL NEARSHORECURRENTS CAN ACCOMPANY A TSUNAMI. DEBRIS PICKED UP AND CARRIEDBY A TSUNAMI AMPLIFIES ITS DESTRUCTIVE POWER. SIMULTANEOUS HIGHTIDES OR HIGH SURF CAN SIGNIFICANTLY INCREASE THE TSUNAMI HAZARD.

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

1105 AM HST SAT 27 FEB 2010

MESSAGES WILL BE ISSUED HOURLY OR SOONER AS CONDITIONS WARRANT.