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Posts Tagged ‘KERMADEC Islands quake’

Powerful Quake Strikes Kermadec Islands

Posted by feww on July 7, 2011

Magnitude 7.6 EQ Strikes E of Raoul Island, Kermadec Islands

The quake which struck at a depth of 20km was followed by several significant aftershocks.

10-degree Map Centered at 30°S,175°W


Earthquake Location Map. Source: USGS-EHP. Map enhanced by FIRE-EARTH.

Earthquake Details

  • Magnitude: 7.6
  • Date-Time: Wednesday, July 06, 2011 at 19:03:16 UTC
  • Location: 29.312°S, 176.204°W
  • Depth: 20 km (12.4 miles)
  • Region: KERMADEC ISLANDS REGION
  • Distances:
    • 163 km (101 miles) E of Raoul Island, Kermadec Islands
    • 347 km (215 miles) NE of L’Esperance Rock, Kermadec Islands
    • 913 km (567 miles) S of NUKU`ALOFA, Tonga
    • 1185 km (736 miles) NE of Auckland, New Zealand
  • Location Uncertainty: horizontal +/- 14.1 km (8.8 miles); depth +/- 4.4 km (2.7 miles)
  • Source: USGS NEIC (WDCS-D)

Tsunami Evaluation 

ISSUED by PACIFIC TSUNAMI WARNING CENTER/NOAA/NWS
AT 19:59UTC 06 JUL 2011

SEA LEVEL READINGS INDICATE A TSUNAMI WAS GENERATED. IT MAY HAVE BEEN DESTRUCTIVE ALONG COASTS NEAR THE EARTHQUAKE EPICENTER. FOR THOSE 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.

NO TSUNAMI THREAT EXISTS FOR OTHER COASTAL AREAS IN THE PACIFIC ALTHOUGH SOME OTHER AREAS MAY EXPERIENCE SMALL SEA LEVEL CHANGES. THE TSUNAMI WARNING IS NOW CANCELLED FOR ALL AREAS COVERED BY THIS CENTER.

Tsunami Wave Amplitude

“The largest wave we saw was a peak to peak amplitude of 1.9 meters which, looking at the sea surface, would be like a one meter rise. That wave was at Raoul Island very close to the earthquake and just to the west of the epicenter,” according to a spokesman at the Pacific Tsunami Warning Center.

“Further away from the quake it is very small to no tsunami. Based on that information it was clear that it was very small and we cancelled [the tsunami warning.]”

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M6.6 Quake Strikes S of the KERMADEC Islands

Posted by feww on April 18, 2011

WE TOLD YOU SO!

Strong Quake Rattles New Zealand’s Proposed Oil Drilling Site at Raukumara Basin

On April 15, 2011  FIRE-EARTH said

Ironically, Raukumara Basin sits between Kermadec Trench and Kermadec Ridge, and has an inherently unstable geology. FIRE-EARTH believes any oil-drilling in the exceptionally seismic area would most certainly prove disastrous for the entire region.

The quake struck at a depth of 90 km about 550 km ENE of Auckland, New Zealand.

10-degree Map Centered at 35°S,180°E


Earthquake Location Map. Source: USGS. Map enhanced by FIRE-EARTH

Earthquake Details [USGS]

  • Magnitude: 6.6
  • Date-Time: Monday, April 18, 2011 at 13:03:04 UTC [Tuesday, April 19, 2011 at 01:03:04 AM at epicenter]
  • Location: 34.321°S, 179.994°E
  • Depth: 90.4 km (56.2 miles)
  • Region:  SOUTH OF THE KERMADEC ISLANDS  [NNE of East Cape, New Zealand]
  • Distances:
    • 380 km NNE (21°) of East Cape New Zealand [FIRE-EARTH estimate]
    • 551 km (342 miles) ENE (61°) from Auckland, New Zealand
    • 899 km (559 miles) NNE (32°) from WELLINGTON, New Zealand
  • Location Uncertainty:  horizontal +/- 14.1 km (8.8 miles); depth +/- 5.4 km (3.4 miles)
  • Parameters:  NST=460, Nph=487, Dmin=390.7 km, Rmss=1.26 sec, Gp= 14°, M-type=teleseismic moment magnitude (Mw), Version=E
  • Source:  U.S. Geological Survey, National Earthquake Information Center: World Data Center for Seismology, Denver
  • Event ID:  usc0002ty7

In Navy Vessel Used Against Deep Sea Drilling Protesters Posted on April 15, 2011 FIRE-EARTH said:


The 25,000sqkm Raukumara Basin extends about 300km north of East Cape.  Source NZ gov.

License to Pollute

Without consulting the local Maori, New Zealand government granted Petrobras a five-year permit for exploration of the Raukumara Basin, off the East Cape of New Zealand in June 2010.

Local Maori feel the pollution risk to the water and fish stocks in the regions is too great, should oil be found off the East Cape of New Zealand.

Ironically, Raukumara Basin sits between Kermadec Trench and Kermadec Ridge, and has an inherently unstable geology. FIRE-EARTH believes any oil-drilling in the exceptionally seismic area would most certainly prove disastrous for the entire region. See blog content for New Zealand earthquake forecasts.

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