7.1 Earthquake Strikes Alaska… Tsunami Alert Generated… But NO TSUNAMI THREAT FOR HAWAII

2:12 AM UPDATE: Tsunami warning CANCELLED for Alaska’s Aleutian Islands per Pacific Tsunami Warning Center.

The West Coast and Alaska Tsunami Warning Center has posted this alert:

“A Tsunami Warning is now in effect which includes the coastal areas of Alaska from Unimak Pass, Alaska (80 miles NE of Dutch Harbor) to Amchitka Pass, Alaska (125 miles W of Adak).”

Magnitude 7.1
Date-Time
  • Friday, September 02, 2011 at 10:55:54 UTC
  • Friday, September 02, 2011 at 01:55:54 AM at epicenter
Location 52.184°N, 171.684°W
Depth 35.5 km (22.1 miles)
Region FOX ISLANDS, ALEUTIAN ISLANDS, ALASKA
Distances
  • 172 km (107 miles) E (90°) from Atka, AK
  • 209 km (130 miles) WSW (247°) from Nikolski, AK
  • 341 km (212 miles) E (82°) from Adak, AK
  • 1659 km (1031 miles) WSW (243°) from Anchorage, AK
Location Uncertainty horizontal +/- 14 km (8.7 miles); depth +/- 4.4 km (2.7 miles)
Parameters NST=824, Nph=825, Dmin=172.5 km, Rmss=0.81 sec, Gp= 54°,
M-type=regional moment magnitude (Mw), Version=9
Source
  • Magnitude: USGS NEIC (WDCS-D)
    Location: USGS NEIC (WDCS-D)
Event ID usc0005n83
TSUNAMI INFORMATION STATEMENT NUMBER 1
NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI
106 AM HST FRI SEP 02 2011

TO - CIVIL DEFENSE IN THE STATE OF HAWAII

SUBJECT - TSUNAMI INFORMATION STATEMENT

THIS STATEMENT IS FOR INFORMATION ONLY. NO ACTION REQUIRED.

AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS

   ORIGIN TIME - 1256 AM HST 02 SEP 2011
   COORDINATES - 51.8 NORTH  171.4 WEST
   LOCATION    - FOX ISLANDS  ALEUTIAN ISLANDS
   MAGNITUDE   - 7.1  MOMENT

EVALUATION

 BASED ON ALL AVAILABLE DATA A DESTRUCTIVE PACIFIC-WIDE TSUNAMI IS
 NOT EXPECTED AND THERE IS NO TSUNAMI THREAT TO HAWAII. REPEAT. A
 DESTRUCTIVE PACIFIC-WIDE TSUNAMI IS NOT EXPECTED AND THERE IS NO
 TSUNAMI THREAT TO HAWAII.THIS WILL BE THE ONLY STATEMENT ISSUED FOR THIS EVENT UNLESS
ADDITIONAL DATA ARE RECEIVED.

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