Sunday, February 28, 2010

Australian Tsunami Warning Issued after Chile Earthquake

Australian Tsunami Warning MapThe Joint Australian Tsunami Warning Centre (JATWS) issued a National Warning Summary and Marine Tsunami Warnings for Norfolk Island, Lord Howe Island, Tasmania, Victoria, New South Wales and Queensland at 5:37AM after an earthquake in Chile. The marine warning was for dangerous waves, strong ocean currents and some localised flooding from around 8am (times vary by location).

The text of the warnings issued by the JATWS are confusing, as they say "TOP PRIORITY FOR IMMEDIATE AND FREQUENT BROADCAST", but do not order use of the Standard Emergency Warning Signal (SEWS).

The Pacific Tsunami Warning Centre issued an Expanding Regional Warning for areas near the earthquake at0646Z 27 FEB 2010. It issued a Pacific Ocean-wide Warning at 1045Z 27 FEB 2010, with supplements every few minutes.

WCATWC Traffic Light Tsunami IndicatorThe West Coast and Alaska Tsunami Warning Centre (WCATWC) turned their traffic light symbol to orange to indicate an advisory.

WCATWC Schematic Map of Earthquake LocationWCATWCV showed a simplified map displaying South America, with the earthquake indicated by a red cross.

National Warning Summary issued 5:37AM EDT Sunday 28 February 2010

IDY68020

Australian Government Bureau of Meteorology

MEDIA:

NO USE OF STANDARD EMERGENCY WARNING SIGNAL (SEWS)

REFER TO INDIVIDUAL STATE AND TERRITORY TSUNAMI WARNINGS AND WATCHES FOR MORE

DETAILED INFORMATION.

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NATIONAL TSUNAMI WARNING SUMMARY FOR AUSTRALIA NUMBER 10

Issued by the Joint Australian Tsunami Warning Centre (JATWC) at

5:37 AM EDT on Sunday 28 February 2010

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TSUNAMI SOURCE:

An undersea earthquake of magnitude 8.8 occurred at 5:34 PM EDT on Saturday 27

February 2010 near THE COAST OF CENTRAL CHILE (latitude 35.320S longitude

72.930W ).

********************************************************************************

NATIONAL TSUNAMI WARNING STATUS SUMMARY:

Norfolk Island Marine Warning issued 6:01AM local time Sunday 28 February 2010

Lord Howe Island Marine Warning issued 5:31AM EDT Sunday 28 February 2010

Tasmania Marine Warning issued 5:31AM EDT Sunday 28 February 2010

Victoria Marine Warning issued 5:30AM EDT Sunday 28 February 2010

New South Wales Marine Warning issued 5:30AM EDT Sunday 28 February 2010

Queensland Marine Warning issued 4:30AM EST Sunday 28 February 2010

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TSUNAMI DETAILS

The following sea level gauges have observed a tsunami:

Heights refer to wave amplitudes (half the peak to trough value).

GAUGE LOCATION LAT LON TIME AMPL

------------------- ----- ------ ----- ---------------

RIKITEA FRENCH POLYNS 23.1S 134.9W 1559Z 0.15M

DART MARQUESAS 51406 8.5S 125.0W 1531Z 0.18M

CALDERA CHILE 27.1S 70.8W 0843Z 0.45M

TALCAHUANO CHILE 36.7S 73.4W 0653Z 2.34M

COQUIMBO CHILE 30.0S 71.3W 0852Z 1.32M

CORRAL CHILE 39.9S 73.4W 0739Z 0.90M

VALPARAISO CHILE 33.0S 71.6W 0708Z 1.29M

IQUIQUE CHILE 20.2S 70.1W 0907Z 0.28M

ANTOFAGASTA CHILE 23.2S 70.4W 0941Z 0.49M

ARICA CHILE 18.5S 70.3W 1007Z 0.94M

DART 32412 18.0S 86.4W 0941Z 0.24M

SAN FELIX CHILE 26.3S 80.1W 0815Z 0.53M

VALPARAISO CHILE 33.0S 71.6W 0708Z 1.29M

EASTER ISLAND 27.2S 109.5W 1205Z 0.35M

BALTRA GALAPAGS IS 0.4S 90.3W 1452Z 0.35M

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FOR LATEST AND FURTHER INFORMATION:

Refer to individual State and Territory tsunami warnings and watches issued by

the JATWC for more detailed information.

Listen for any further advice from your local emergency service through the

media.

Maps showing the affected areas are on the Bureau web site www.bom.gov.au.

For emergency assistance, call your local emergency service on 132 500. Call

the Tasmania Police on 131 444.

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NEXT UPDATE:

The next national warning summary will be issued at 7:07 AM EDT on Sunday 28

February 2010

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EDT = Eastern Daylight Time

EST = Eastern Standard Time = EDT - 1 hour

CST = Central Standard Time = EDT - 1.5 hours

CDT = Central Daylight Time = EDT - 30 minutes

WST = Western Standard Time = EDT - 3 hours

The JATWC is operated by the Australian Bureau of Meteorology and Geoscience

Australia

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TSUNAMI BULLETIN NUMBER 014
PACIFIC TSUNAMI WARNING CENTER/NOAA/NWS
ISSUED AT 1934Z 27 FEB 2010

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

... A WIDESPREAD TSUNAMI WARNING IS IN EFFECT ...

A TSUNAMI WARNING IS IN EFFECT FOR

CHILE / PERU / ECUADOR / COLOMBIA / ANTARCTICA / PANAMA /
COSTA RICA / NICARAGUA / PITCAIRN / HONDURAS / EL SALVADOR /
GUATEMALA / FR. POLYNESIA / MEXICO / COOK ISLANDS / KIRIBATI /
KERMADEC IS / NIUE / NEW ZEALAND / TONGA / AMERICAN SAMOA /
SAMOA / JARVIS IS. / WALLIS-FUTUNA / TOKELAU / FIJI /
AUSTRALIA / HAWAII / PALMYRA IS. / TUVALU / VANUATU /
HOWLAND-BAKER / NEW CALEDONIA / JOHNSTON IS. / SOLOMON IS. /
NAURU / MARSHALL IS. / MIDWAY IS. / KOSRAE / PAPUA NEW GUINEA /
POHNPEI / WAKE IS. / CHUUK / RUSSIA / MARCUS IS. / INDONESIA /
N. MARIANAS / GUAM / YAP / BELAU / JAPAN / PHILIPPINES /
CHINESE TAIPEI

THIS BULLETIN IS ISSUED AS ADVICE TO GOVERNMENT AGENCIES. ONLY
NATIONAL AND LOCAL GOVERNMENT AGENCIES HAVE THE AUTHORITY TO MAKE
DECISIONS REGARDING THE OFFICIAL STATE OF ALERT IN THEIR AREA AND
ANY ACTIONS TO BE TAKEN IN RESPONSE.

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
------------------- ----- ------ ----- --------------- -----
CABO SAN LUCAS MX 22.9N 109.9W 1833Z 0.36M / 1.2FT 12MIN
DART TONGA 51426 23.0S 168.1W 1844Z 0.04M / 0.1FT 30MIN
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
ACAPULCO MX 16.8N 99.9W 1549Z 0.16M / 0.5FT 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
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.

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

THE WEST COAST/ALASKA TSUNAMI WARNING CENTER WILL ISSUE PRODUCTS
FOR ALASKA...BRITISH COLUMBIA...WASHINGTON...OREGON...CALIFORNIA.

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