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New Round of Geo-Assualt at Kermadec Trench

Posted by feww on August 19, 2009

Magnitude 6.3 Quake South of Fiji Isles May Herald New Round of ‘Geo-Assault’ at Kermadec Trench

Following the powerful 7.8 magnitude earthquake that struck the tip of the Fiordland, South island, New Zealand, followed by a large cluster of aftershocks (still ongoing), another round of geo-assault appear to be gearing up at the southern end of the Kermadec trench.

The Fiordland quakes occurred as a result of a large reverse faulting motion caused by the subduction of the Australian subplate under the Pacific plate, on which Fiordland rests,  in Puysegur Trench, at the Alpine Fault.

The new wave of earthquakes would instead be caused by the ‘mirror image’ action, with Pacific plate subducting beneath the Australian protoplate.

A magnitude 6.3 earthquake that struck south of the Fiji Islands on August 18, 2009 at 21:21 UTC may herald a new round of intense [and unprecedented] seismic activity at Kermadec Trench to the north, NE, and East of the North Island, as well as the north, NE, and east of the South Island, New Zealand.

Details of the latest quake in the region:

fiji isles
Earthquake Location Map. Source of original map: USGS

  • Magnitude: 6.3
  • Date-Time:  Tuesday, August 18, 2009 at 21:20:47 UTC
  • Location: 26.014°S, 178.390°W
  • Depth:  269 km (167.2 miles)
  • Region: SOUTH OF THE FIJI ISLANDS
  • Distances:
    • 360 km (225 miles) N of Raoul Island, Kermadec Islands
    • 595 km (370 miles) S of Ndoi Island, Fiji
    • 1365 km (850 miles) NNE of Auckland, New Zealand
    • 1800 km (1120 miles) NNE of WELLINGTON, New Zealand
  • Location Uncertainty:  horizontal +/- 6 km (3.7 miles)
  • Parameters:  NST=236, Nph=236, Dmin=362.1 km, Rmss=0.95 sec, Gp= 29°,  M-type=centroid moment magnitude (Mw), Version=8
  • Source:  USGS NEIC (WDCS-D)
  • Event ID: us2009klcj

[Caution: Data provided by the USGS  Earthquake Hazard Program may be subject to large margins of error as well as ‘ghost reporting,’ and therefore may be unreliable. ]

Related Links:

7 Responses to “New Round of Geo-Assualt at Kermadec Trench”

  1. feww said

    Reference Number 3167911/G
    Universal Time October 14 2009 at 13:55
    NZ Daylight Time Thursday, October 15 2009 at 2:55 am
    Latitude, Longitude 37.95°S, 176.61°E
    Focal Depth 150 km
    Richter magnitude 5.5
    Region Bay of Plenty
    Location

    * 10 km south-west of Matata
    * 20 km north-west of Kawerau
    * 30 km west of Whakatane
    * 200 km south-east of Auckland
    ===========================================
    Reference Number 3166074/G
    Universal Time October 10 2009 at 15:04
    NZ Daylight Time Sunday, October 11 2009 at 4:04 am
    Latitude, Longitude 37.60°S, 178.37°E
    Focal Depth 60 km
    Richter magnitude 4.6
    Region Gisborne
    Location

    * Within 5 km of Te Araroa
    * 20 km north of Tikitiki
    * 120 km north of Gisborne
    * 330 km east of Auckland
    ===========================================
    Reference Number 3165869/G
    Universal Time October 10 2009 at 5:02
    NZ Daylight Time Saturday, October 10 2009 at 6:02 pm
    Latitude, Longitude 41.17°S, 174.61°E
    Focal Depth 40 km
    Richter magnitude 4.8
    Region Wellington
    Location

    * 20 km north-west of Wellington

    ===========================================
    Reference Number 3165373/G
    Universal Time October 9 2009 at 4:08
    NZ Daylight Time Friday, October 9 2009 at 5:08 pm
    Latitude, Longitude 40.96°S, 176.27°E
    Focal Depth 30 km
    Richter magnitude 4.3
    Region Wairarapa
    Location

    * 10 km south-east of Castlepoint
    * 20 km south-east of Tinui
    * 50 km east of Masterton
    * 130 km east of Wellington
    ===========================================
    # Reference Number: 3154442
    # NZST: Wed, Sep 16 2009 5:13 am
    # Magnitude: 4.1
    # Depth: 30 km
    # Details: 30 km east of Castlepoint

    ===========================================
    # Reference Number: 3152083
    # NZST: Thu, Sep 10 2009 9:07 pm
    # Magnitude: 4.1
    # Depth: 70 km
    # Details: 60 km west of Paraparaumu
    ===========================================
    Reference Number 3151675/G
    Universal Time September 9 2009 at 10:32
    NZ Standard Time Wednesday, September 9 2009 at 10:32 pm
    Latitude, Longitude 32.26°S, 179.04°W
    Focal Depth 420 km
    Richter magnitude 6.5
    Region NE of New Zealand
    Location

    * 100 km south of L’Esperance Rock
    * 230 km south of Macauley Island
    * 680 km north-east of White Island
    * 720 km north-east of Whangarei
    * 760 km north-east of Auckland

    ===========================================
    Source: GeoBet New Zealand

  2. feww said

    Strong Quake Strikes Off Coast of NI, NZ

    https://feww.wordpress.com/2009/09/01/strong-quake-strikes-off-coast-of-ni-nz/

  3. feww said

    latest quakes >= 4.9 in Kermadec Trench/ New Zealand Region
    # Reference Number: 3151852
    # NZST: Thu, Sep 10 2009 8:55 am
    # Magnitude: 4.9
    # Depth: 5 km
    # Details: 90 km west of Te Anau
    ________________________________________

    # Reference Number: 3151675
    # NZST: Wed, Sep 9 2009 10:32 pm
    # Magnitude: 6.5
    # Depth: 420 km
    # Details: 680 km north-east of White Island
    ________________________________________

    # Reference Number: 3149453
    # NZST: Sat, Sep 5 2009 3:07 am
    # Magnitude: 5.0
    # Depth: 12 km
    # Details: 110 km west of Tuatapere
    ________________________________________

    Source: Geonet

  4. feww said

    Date & Time (UTC) Latitude Longitude Depth(km) Mag. Region name

    2009-09-02 18:00:10.0 29.23S 178.70W 259 Mw 6.2 KERMADEC ISLANDS, NEW ZEALAND

    source: European-Mediterranean Seismological Center

  5. feww said

    Magnitude 6.0 [Richter] Strikes 60 km north of White Island. NZ, Tuesday, September 1 2009 at 0:18 pm UTC
    Quake Details [GNS Sighence]
    Reference: 3147526/G
    Date/Time: September 1 2009 at 0:18 UTC
    Location: Latitude 37.01°S, Longitude 176.95°E
    Depth: 250 km
    Richter magnitude: 6.0
    Region: Raukumara Plain
    Distances:
    + 60 km north of White Island
    + 100 km east of Whangamata
    + 100 km north-east of Tauranga
    + 190 km east of Auckland

  6. feww said

    Magnitude 6.6 – SAMOA ISLANDS REGION
    2009 August 30 14:51:33 UTC

    Magnitude: 6.6
    Date-Time: Sunday, August 30, 2009 at 14:51:33 UTC
    Location: 15.187°S, 172.525°W
    Depth: 10 km (6.2 miles)
    Region: SAMOA ISLANDS REGION
    Distances: 155 km (95 miles) ENE of Hihifo, Tonga
    + 175 km (110 miles) SSW of APIA, Samoa
    + 720 km (445 miles) NNE of NUKU’ALOFA, Tonga
    + 2715 km (1680 miles) NNE of Auckland, New Zealand
    Location Uncertainty: horizontal +/- 5.6 km (3.5 miles); depth fixed by location program
    Parameters: NST=313, Nph=313, Dmin=>999 km, Rmss=0.94 sec, Gp= 22°,
    M-type=teleseismic moment magnitude (Mw), Version=R
    Source: USGS NEIC (WDCS-D)
    Event ID: us2009kybj

  7. feww said

    Magnitude 5.2 earthquake struck Wellington this morning at 2.10am, and scared locals out of bed, however there were no immediate reports of casualties/ damage, reports said.
    The mainshock was followed by a 4.3 aftershock at 3.52am, NZ’s EQ center said.

    Details of mainshock
    Reference Number: 3145159/G
    Date/Time: August 27 2009 at 14:10 UCT
    Epicenter: Latitude 41.44°S, Longitude 174.72°E
    Depth: 30 km
    Richter magnitude: 5.2
    Region: Wellington, NZ
    Location: 20 km south of Wellington

    Aftershock:
    Reference Number: 3145196/G
    Date/Time: August 27 2009 at 15:52 UCT
    Epicenter: Latitude 41.45°S, Longitude 174.71°E
    Depth: 35 km
    Richter magnitude: 4.3
    Region: Wellington
    Location: 20 km south of Wellington

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