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Earthquake Cluster Zone Closing in on New Zealand

Posted by feww on October 6, 2008

Another Powerful Quake Hits Kermadec Isles Region

A magnitude 6.5 earthquake followed by two strong aftershocks hit the Kermadec Islands region in line with FEWW forecast.

10-degree Map Centered at 30°S,175°W

Raoul Island, Kermadec Islands, Global Reference Map. USGS

FEWW Comments:

  • The center of earthquake cluster incidence within the epicentral region of the  Kermadec Trench appears to be shifting south-southwest of its historical position, and closer to New Zealand North Island.
  • According to FEWW analysis a magnitude 8+ earthquake would likely strike the Kermadec Isles epicentral region centered in an area about 285km SSE of Raoul Island [~900km NE of Auckland, New Zealand] before the New Year. Since 1900 only one other earthquake with a magnitude of 8 has struck the region. [1917 May 1 18:26 UTC, Depth: 60 km – USGS data]

Tectonic Setting

Kermadec Trench – Epicentral Region. Image Credit: USGS

Related Links:

Main Shock

Magnitude: 6.5
Date-Time: Sunday, October 05, 2008 at 09:12:40 PM at epicenter
Location: 30.327°S, 177.195°W
Depth: 35 km (21.7 miles) set by location program

  • 135 km (85 miles) SSE of Raoul Island, Kermadec Islands
    205 km (125 miles) NE of L’Esperance Rock, Kermadec Islands
    1035 km (650 miles) NE of Auckland, New Zealand
    1410 km (880 miles) NNE of WELLINGTON, New Zealand

Location Uncertainty: horizontal +/- 11.3 km (7.0 miles); depth fixed by location program
Event ID    us2008xuan


1. Magnitude:    5.2
Date-Time: Sunday, October 05, 2008 at 10:45:00 UTC [ October 05, 2008 at 10:45:00 PM at epicenter]
Location:    30.856°S, 176.659°W
Source:    USGS NEIC (WDCS-D)
Event ID: us2008xuas

2. Magnitude:    5.2
Date-Time:  Sunday, October 05, 2008 at 14:09:50 UTC [October 06, 2008 at 02:09:50 AM at epicenter]
Location: 31.156°S, 177.721°W
Event ID:  us2008xua8

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