27 February 2010

Tsunami Arrives in Japan

FOR CURRENT INFORMATION ON TSUNAMI ADVISORIES

Pacific Tsunami Warning Center

(below relates to 28 Feb 2010 tsunami advisory)
--

Check out CNN's video:

Japan gets first tsunami waves from Chile quake

TSUNAMI BULLETIN NUMBER 025
PACIFIC TSUNAMI WARNING CENTER/NOAA/NWS
ISSUED AT 0757Z 28 FEB 2010

THIS BULLETIN APPLIES TO AREAS WITHIN AND BORDERING THE PACIFIC
OCEAN AND ADJACENT SEAS...EXCEPT ALASKA...BRITISH COLUMBIA...
WASHINGTON...OREGON AND CALIFORNIA.

... THE TSUNAMI WARNING REMAINS IN EFFECT FOR JAPAN ...

THE TSUNAMI WARNING IS NOW CANCELLED FOR RUSSIA

AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS

ORIGIN TIME - 0634Z 27 FEB 2010
COORDINATES - 36.1 SOUTH 72.6 WEST
DEPTH - 55 KM
LOCATION - NEAR COAST OF CENTRAL CHILE
MAGNITUDE - 8.8

MEASUREMENTS OR REPORTS OF TSUNAMI WAVE ACTIVITY

GAUGE LOCATION LAT LON TIME AMPL PER
------------------- ----- ------ ----- --------------- -----
OFUNATO HONSHU 39.0N 141.8E 0559Z 0.41M / 1.3FT 48MIN
OMAEZAKI HONSHU 34.6N 138.2E 0616Z 0.34M / 1.1FT 70MIN
HANASAKI HOKKAIDO 43.3N 145.6E 0636Z 0.82M / 2.7FT 24MIN
DUTCH HBR UNALASKA 53.9N 166.5W 0325Z 0.18M / 0.6FT 28MIN
ADAK AK 51.9N 176.6W 0412Z 0.35M / 1.2FT 20MIN
GUAM US 13.4N 144.7E 0307Z 0.16M / 0.5FT 34MIN
DART SAIPAN 52401 19.3N 155.8E 0355Z 0.08M / 0.3FT 18MIN
MIDWAY 28.2N 177.4W 0137Z 0.28M / 0.9FT 10MIN
WAKE US 19.3N 166.6E 0259Z 0.26M / 0.8FT 12MIN
SITKA AK 57.1N 135.3W 0111Z 0.08M / 0.3FT 24MIN
NAWILIWILI KAUAI 22.0N 159.4W 2323Z 0.37M / 1.2FT 10MIN
HONOLULU OAHU 21.3N 157.9W 2200Z 0.25M / 0.8FT 46MIN
DART TONGA 51426 23.0S 168.1W 2003Z 0.04M / 0.1FT 32MIN
CRESCENT CITY CA 41.7N 124.2W 2213Z 0.37M / 1.2FT 50MIN
SANTA BARBARA CA 34.4N 119.7W 2150Z 0.53M / 1.7FT 20MIN
PAGO PAGO AS 14.3S 170.7W 2027Z 0.70M / 2.3FT 12MIN
JOHNSTON US 16.7N 169.5W 2248Z 0.22M / 0.7FT 64MIN
VANUATU 17.8S 168.3E 2246Z 0.15M / 0.5FT 22MIN
BARBERS PT HI 21.3N 158.1W 2157Z 0.12M / 0.4FT 54MIN
NUKUALOFA TO 21.1S 175.2W 2024Z 0.10M / 0.3FT 62MIN
KAWAIHAE HAWAII 20.0N 155.8W 2211Z 0.52M / 1.7FT 24MIN
KAUMALAPAU HAWAII 20.8N 156.9W 2136Z 0.18M / 0.6FT 56MIN
KAHULUI MAUI 20.9N 156.5W 2147Z 0.98M / 3.2FT 22MIN
MONTEREY HARBOR CA 36.6N 121.9W 2031Z 0.32M / 1.1FT 56MIN
SANTA MONICA CA 34.0N 118.5W 2035Z 0.41M / 1.4FT 32MIN
SAN DIEGO CA 32.7N 117.2W 2036Z 0.13M / 0.4FT 20MIN
APIA UPOLU WS 13.8S 171.8W 2018Z 0.16M / 0.5FT 16MIN
RAROTONGA CK 21.2S 159.8W 1907Z 0.15M / 0.5FT 24MIN
ACAPULCO MX 16.8N 99.9W 1931Z 0.62M / 2.0FT 26MIN
DART SAN DIEGO 4641 32.2N 120.7W 1931Z 0.06M / 0.2FT 24MIN
LOTTIN PT NZ 37.6S 178.2E 1934Z 0.15M / 0.5FT 10MIN
RAROTONGA CK 21.2S 159.8W 1918Z 0.32M / 1.0FT 06MIN
CABO SAN LUCAS MX 22.9N 109.9W 1833Z 0.36M / 1.2FT 12MIN
HIVA OA MARQUESAS 9.8S 139.0W 1741Z 1.79M / 5.9FT 12MIN
PAPEETE TAHITI 17.5S 149.6W 1810Z 0.16M / 0.5FT 10MIN
NUKU HIVA MARQUESAS 8.9S 140.1W 1745Z 0.95M / 3.1FT 04MIN
MANZANILLO MX 19.1N 104.3W 1705Z 0.32M / 1.0FT 24MIN
DART MANZANILLO 434 16.0N 107.0W 1611Z 0.07M / 0.2FT 24MIN
RIKITEA PF 23.1S 134.9W 1559Z 0.15M / 0.5FT 22MIN
DART MARQUESAS 5140 8.5S 125.0W 1531Z 0.18M / 0.6FT 18MIN
QUEPOS CR 0.0N 9.4E 1416Z 0.24M / 0.8FT 52MIN
BALTRA GALAPAGS EC 0.4S 90.3W 1452Z 0.35M / 1.2FT 14MIN
EASTER CL 27.2S 109.5W 1205Z 0.35M / 1.1FT 52MIN
ANCUD CL 41.9S 73.8W 0838Z 0.62M / 2.0FT 84MIN
CALLAO LA-PUNTA PE 12.1S 77.2W 1029Z 0.36M / 1.2FT 30MIN
ARICA CL 18.5S 70.3W 1008Z 0.94M / 3.1FT 42MIN
IQUIQUE CL 20.2S 70.1W 0907Z 0.28M / 0.9FT 68MIN
ANTOFAGASTA CL 23.2S 70.4W 0941Z 0.49M / 1.6FT 52MIN
DART LIMA 32412 18.0S 86.4W 0941Z 0.24M / 0.8FT 36MIN
CALDERA CL 27.1S 70.8W 0843Z 0.45M / 1.5FT 20MIN
TALCAHUANO CL 36.7S 73.4W 0653Z 2.34M / 7.7FT 88MIN
COQUIMBO CL 30.0S 71.3W 0852Z 1.32M / 4.3FT 30MIN
CORRAL CL 39.9S 73.4W 0739Z 0.90M / 2.9FT 16MIN
SAN FELIX CL 26.3S 80.1W 0815Z 0.53M / 1.7FT 08MIN
VALPARAISO CL 33.0S 71.6W 0708Z 1.29M / 4.2FT 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.

EVALUATION

SEA LEVEL READINGS CONFIRM THAT A TSUNAMI HAS BEEN GENERATED
WHICH COULD CAUSE WIDESPREAD DAMAGE. AUTHORITIES SHOULD TAKE
APPROPRIATE ACTION IN RESPONSE TO THIS THREAT. THIS CENTER WILL
CONTINUE TO MONITOR SEA LEVEL DATA TO DETERMINE THE EXTENT AND
SEVERITY OF THE THREAT.

A TSUNAMI IS A SERIES OF WAVES AND THE FIRST WAVE MAY NOT BE THE
LARGEST. TSUNAMI WAVE HEIGHTS CANNOT BE PREDICTED AND CAN VARY
SIGNIFICANTLY ALONG A COAST DUE TO LOCAL EFFECTS. THE TIME FROM
ONE TSUNAMI WAVE TO THE NEXT CAN BE FIVE MINUTES TO AN HOUR, AND
THE THREAT CAN CONTINUE FOR MANY HOURS AS MULTIPLE WAVES ARRIVE.

FOR ALL AREAS - WHEN NO MAJOR WAVES ARE OBSERVED FOR TWO HOURS
AFTER THE ESTIMATED TIME OF ARRIVAL OR DAMAGING WAVES HAVE NOT
OCCURRED FOR AT LEAST TWO HOURS THEN LOCAL AUTHORITIES CAN ASSUME
THE THREAT IS PASSED. DANGER TO BOATS AND COASTAL STRUCTURES CAN
CONTINUE FOR SEVERAL HOURS DUE TO RAPID CURRENTS. AS LOCAL
CONDITIONS CAN CAUSE A WIDE VARIATION IN TSUNAMI WAVE ACTION THE
ALL CLEAR DETERMINATION MUST BE MADE BY LOCAL AUTHORITIES.

ESTIMATED INITIAL TSUNAMI WAVE ARRIVAL TIMES AT FORECAST POINTS
WITHIN THE WARNING AND WATCH AREAS ARE GIVEN BELOW. ACTUAL
ARRIVAL TIMES MAY DIFFER AND THE INITIAL WAVE MAY NOT BE THE
LARGEST. A TSUNAMI IS A SERIES OF WAVES AND THE TIME BETWEEN
SUCCESSIVE WAVES CAN BE FIVE MINUTES TO ONE HOUR.

LOCATION FORECAST POINT COORDINATES ARRIVAL TIME
-------------------------------- ------------ ------------
JAPAN KUSHIRO 42.9N 144.3E 0435Z 28 FEB
KATSUURA 35.1N 140.3E 0453Z 28 FEB
HACHINOHE 40.5N 141.5E 0509Z 28 FEB
SHIMIZU 32.8N 133.0E 0557Z 28 FEB
OKINAWA 26.2N 127.8E 0610Z 28 FEB

BULLETINS WILL BE ISSUED HOURLY OR SOONER IF CONDITIONS WARRANT.
THE TSUNAMI WARNING WILL REMAIN IN EFFECT UNTIL FURTHER NOTICE.

No comments:

Post a Comment