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Magnitude 6.8 Quake strikes Kermadec Isls Region

Posted by feww on December 10, 2008

An earthquake with preliminary magnitude 6.8 struck  in the Kermadec Islands region, north of New Zealand

For background information and earlier FEWW forecast see:

Earthquake Details (USGS)

Kermadec cluster 12Dec2008
Original Images: USGS.

Magnitude: 6.8
Date-Time:

  • Tuesday, December 09, 2008 at 06:23:59 UTC
  • Tuesday, December 09, 2008 at 06:23:59 PM at epicenter

Location: 31.092°S, 176.965°W
Depth: 13.6 km (8.5 miles) (poorly constrained)
Region: Kermadec Islands region

Distances:

  • 190 km (115 miles) E of L’Esperance Rock, Kermadec Islands
  • 220 km (140 miles) SSE of Raoul Island, Kermadec Islands
  • 990 km (620 miles) NE of Auckland, New Zealand
  • 1350 km (840 miles) NE of WELLINGTON, New Zealand

Location Uncertainty: horizontal +/- 6.1 km (3.8 miles); depth +/- 22.4 km (13.9 miles)

Source: USGS NEIC (WDCS-D)

[UPDATE: December 12, 2008]

The above mainshock was followed by two strong aftershocks measuring 5.1 Mw:

Aftershock #1
Magnitude: 5.1
Date-Time:  Friday, December 12, 2008 at 10:46:18 UTC
Location:  31.101°S, 176.838°W
Depth:  10 km (6.2 miles) set by location program
Region: KERMADEC ISLANDS REGION
Distances:

  • 200 km (125 miles) E of L’Esperance Rock, Kermadec Islands
  • 230 km (140 miles) SSE of Raoul Island, Kermadec Islands
  • 1005 km (620 miles) NE of Auckland, New Zealand
  • 1350 km (840 miles) NE of WELLINGTON, New Zealand

Location Uncertainty horizontal +/- 13.3 km (8.3 miles); depth fixed by location program
Source: USGS NEIC (WDCS-D)
Event ID: us2008amai

Aftershock #2
Magnitude: 5.1
Date-Time:  Friday, December 12, 2008 at 11:55:29 UTC
Location: 31.096°S, 176.870°W
Depth: 10 km (6.2 miles) set by location program
Region: KERMADEC ISLANDS REGION
Distances:

  • 195 km (120 miles) E of L’Esperance Rock, Kermadec Islands
  • 225 km (140 miles) SSE of Raoul Island, Kermadec Islands
  • 1005 km (620 miles) NE of Auckland, New Zealand
  • 1350 km (840 miles) NE of WELLINGTON, New Zealand

Location Uncertainty:  horizontal +/- 11.9 km (7.4 miles); depth fixed by location program
Source:  USGS NEIC (WDCS-D)
Event ID:  us2008amam


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2 Responses to “Magnitude 6.8 Quake strikes Kermadec Isls Region”

  1. feww said

    KERMADEC ISLANDS REGION Earthquake Update:

    Magnitude 6.9 quake strikes KERMADEC ISLANDS REGION
    Magnitude: 6.9
    Date-Time
    * Wednesday, February 18, 2009 at 21:53:45 UTC
    * Thursday, February 19, 2009 at 09:53:45 AM at epicenter
    Location: 27.415°S, 176.419°W
    Depth: 25 km (15.5 miles) set by location program
    Region: KERMADEC ISLANDS REGION
    Distances:
    * 250 km (155 miles) NE of Raoul Island, Kermadec Islands
    * 505 km (315 miles) NNE of L’Esperance Rock, Kermadec Islands
    * 1335 km (830 miles) NE of Auckland, New Zealand
    * 1740 km (1080 miles) NNE of WELLINGTON, New Zealand
    Location Uncertainty: horizontal +/- 7.1 km (4.4 miles); depth fixed by location program
    Parameters: NST=221, Nph=221, Dmin=>999 km, Rmss=0.95 sec, Gp= 22°,
    M-type=regional moment magnitude (Mw), Version=7
    Source: USGS NEIC (WDCS-D)

    Event ID: us2009dfb4

  2. feww said

    Magnitude 6.0 Strikes KERMADEC ISLANDS, NEW ZEALAND
    Earthquake Details
    Magnitude: 6.0
    Date-Time:
    * Tuesday, February 17, 2009 at 03:30:53 UTC
    * Tuesday, February 17, 2009 at 03:30:53 PM at epicenter
    * Time of Earthquake in other Time Zones
    Location: 30.824°S, 178.661°W
    Depth: 10 km (6.2 miles) set by location program
    Region: KERMADEC ISLANDS, NEW ZEALAND
    Distances:
    * 70 km (45 miles) NNE of L’Esperance Rock, Kermadec Islands
    * 190 km (120 miles) SSW of Raoul Island, Kermadec Islands
    * 900 km (560 miles) NE of Auckland, New Zealand
    * 1305 km (810 miles) NNE of WELLINGTON, New Zealand
    Location Uncertainty: horizontal +/- 10.5 km (6.5 miles); depth fixed by location program
    Parameters: NST= 45, Nph= 45, Dmin=912.4 km, Rmss=0.99 sec, Gp= 65°,
    M-type=regional moment magnitude (Mw), Version=7
    Source: USGS NEIC (WDCS-D)

    Event ID: us2009deak

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