Categorized | Earthquake, News

No tsunami threat from 6.2M earthquake in Tonga Thursday (Sept 22)

Magnitude
6.2
Date-Time
Thursday, September 22, 2011 at 23:07:03 UTC
Friday, September 23, 2011 at 12:07:03 PM at epicenter
Location
15.449°S, 175.293°W
Depth
8.6 km (5.3 miles)
Region
TONGA
Distances
382 km (238 miles) NNW (338°) from Neiafu, Tonga
423 km (263 miles) WSW (244°) from APIA, Samoa
2751 km (1709 miles) W (271°) from PAPEETE, Tahiti, French Polynesia

TSUNAMI BULLETIN NUMBER 001
PACIFIC TSUNAMI WARNING CENTER/NOAA/NWS
ISSUED AT 2314Z 22 SEP 2011

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

… TSUNAMI INFORMATION BULLETIN …

THIS BULLETIN IS FOR INFORMATION ONLY.

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 – 2307Z 22 SEP 2011
COORDINATES – 15.0 SOUTH 174.8 WEST
DEPTH – 41 KM
LOCATION – SAMOA ISLANDS REGION
MAGNITUDE – 6.8

EVALUATION

NO DESTRUCTIVE WIDESPREAD TSUNAMI THREAT EXISTS BASED ON HISTORICAL EARTHQUAKE AND TSUNAMI DATA.

HOWEVER – EARTHQUAKES OF THIS SIZE SOMETIMES GENERATE LOCAL TSUNAMIS THAT CAN BE DESTRUCTIVE ALONG COASTS LOCATED WITHIN A HUNDRED KILOMETERS OF THE EARTHQUAKE EPICENTER. AUTHORITIES IN THE REGION OF THE EPICENTER SHOULD BE AWARE OF THIS POSSIBILITY AND TAKE APPROPRIATE ACTION.

THIS WILL BE THE ONLY BULLETIN ISSUED FOR THIS EVENT UNLESS ADDITIONAL INFORMATION BECOMES AVAILABLE.

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

One Response to “No tsunami threat from 6.2M earthquake in Tonga Thursday (Sept 22)”

  1. The Truth says:

    WHY DID THEY MARK IT DOWN FROM A 6.8? ARE THEY TRYING TO COVER SOMETHING UP?

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