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Massive 7.3 Earthquake hits off of New Zealand
http://earthquake.usgs.gov/eqcenter/rec ... 08xna6.php
Earthquake Details
Magnitude 7.3
Date-Time Monday, September 29, 2008 at 15:19:32 UTC
Tuesday, September 30, 2008 at 03:19:32 AM at epicenter
Time of Earthquake in other Time Zones
Location 29.897°S, 177.780°W
Depth 35 km (21.7 miles) set by location program
Region KERMADEC ISLANDS, NEW ZEALAND
Distances 70 km (45 miles) S of Raoul Island, Kermadec Islands
200 km (125 miles) NNE of L'Esperance Rock, Kermadec Islands
1035 km (640 miles) NE of Auckland, New Zealand
1425 km (890 miles) NNE of WELLINGTON, New Zealand
Location Uncertainty horizontal +/- 20.6 km (12.8 miles); depth fixed by location program
Parameters NST= 32, Nph= 32, Dmin=>999 km, Rmss=1.64 sec, Gp=101°,
M-type=regional moment magnitude (Mw), Version=6
Source USGS NEIC (WDCS-D)
Event ID us2008xna6
7.0 Earthquake off the coast of New Zealand
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HURAKAN
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Tectonic Summary
The September 29, 2008, M7.0 earthquake occurred in the Tonga - Kermadec subduction zone. The subduction zone extends north-northeast from the North Island of New Zealand for over 2500 km through Tonga to within 100 km of Western Samoa. At a broad scale, tectonics of the subduction zone reflect the motion of the Pacific plate westward with respect to the interior of the Australia plate at a velocity of about 60 mm/y in the epicentral region of the earthquake. The Pacific plate subducts beneath the Australia plate at the Tonga and Kermadec trenches, and dips to the west. In detail, the eastern edge of the broad Australia plate may itself be viewed as a collection of small plates or microplates that move with respect to each other and with respect to the Pacific plate and the Australia plate interior. The location and focal-mechanism of the earthquake are consistent with it occurring as thrust faulting on the interface between the subducting Pacific plate and the overriding Australia plate (in detail, the overriding Kermadec microplate).
The interaction between the Pacific and Australia plate creates one of the most active tectonic environments in the world, with a high level of associated earthquake activity. Since 1976, a 200-km long section of the Tonga - Kermadec subduction zone that includes the epicenter of the September 29 earthquake has produced over 50 earthquakes of magnitude 6 or larger, with the largest having magnitude 7.9.
Link: http://earthquake.usgs.gov/eqcenter/rec ... hp#summary
The September 29, 2008, M7.0 earthquake occurred in the Tonga - Kermadec subduction zone. The subduction zone extends north-northeast from the North Island of New Zealand for over 2500 km through Tonga to within 100 km of Western Samoa. At a broad scale, tectonics of the subduction zone reflect the motion of the Pacific plate westward with respect to the interior of the Australia plate at a velocity of about 60 mm/y in the epicentral region of the earthquake. The Pacific plate subducts beneath the Australia plate at the Tonga and Kermadec trenches, and dips to the west. In detail, the eastern edge of the broad Australia plate may itself be viewed as a collection of small plates or microplates that move with respect to each other and with respect to the Pacific plate and the Australia plate interior. The location and focal-mechanism of the earthquake are consistent with it occurring as thrust faulting on the interface between the subducting Pacific plate and the overriding Australia plate (in detail, the overriding Kermadec microplate).
The interaction between the Pacific and Australia plate creates one of the most active tectonic environments in the world, with a high level of associated earthquake activity. Since 1976, a 200-km long section of the Tonga - Kermadec subduction zone that includes the epicenter of the September 29 earthquake has produced over 50 earthquakes of magnitude 6 or larger, with the largest having magnitude 7.9.
Link: http://earthquake.usgs.gov/eqcenter/rec ... hp#summary
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HURAKAN
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TSUNAMI INFORMATION STATEMENT NUMBER 1
NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI
534 AM HST MON SEP 29 2008
TO - CIVIL DEFENSE IN THE STATE OF HAWAII
SUBJECT - TSUNAMI INFORMATION
THIS STATEMENT IS FOR INFORMATION ONLY. NO ACTION REQUIRED.
AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS
ORIGIN TIME - 0519 AM HST 29 SEP 2008
COORDINATES - 30.1 SOUTH 176.8 WEST
LOCATION - KERMADEC ISLANDS REGION
MAGNITUDE - 6.9 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.
Link: http://www.prh.noaa.gov/ptwc/messages/h ... 153452.txt
NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI
534 AM HST MON SEP 29 2008
TO - CIVIL DEFENSE IN THE STATE OF HAWAII
SUBJECT - TSUNAMI INFORMATION
THIS STATEMENT IS FOR INFORMATION ONLY. NO ACTION REQUIRED.
AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS
ORIGIN TIME - 0519 AM HST 29 SEP 2008
COORDINATES - 30.1 SOUTH 176.8 WEST
LOCATION - KERMADEC ISLANDS REGION
MAGNITUDE - 6.9 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.
Link: http://www.prh.noaa.gov/ptwc/messages/h ... 153452.txt
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