Archive for the ‘Earthquakes – Analysis’ Category

Dusky Sound Earthquake

Friday, July 17th, 2009

The magnitude of Wednesday’s earthquake has been revised downward slightly and attention has turned to why greater damage has not occurred. Aftershocks continue to unnerve Fiordland, Southland and Otago residents, while damage claims begin to flow in to EQC.

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Biggest Quake in 80 Years

Thursday, July 16th, 2009

Last night’s Fiordland earthquake was the largest to strike mainland New Zealand in 80 years according to GeoNet.

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Lake Taupo Earthquake Swarm

Saturday, June 27th, 2009

Activity associated with an earthquake swarm located in the southern part of Lake Taupo has increased this morning with GeoNet reporting eight shallow earthquakes with magnitudes between 2 and 4.

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Lake Rotoaira Earthquake Swarm

Monday, June 1st, 2009

A series of light earthquakes felt at Turangi (south of Lake Taupo volcano) overnight, has drawn attention to an earthquake swarm occurring on the northern shore of nearby Lake Rotoaira.

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Geological Summary for New Zealand Area, December 2008

Friday, January 16th, 2009

Earthquake activity continued at an increased level. White Island and Mt. Ruapehu remained at Alert Level 1, Mt. Ngauruhoe was reduced to Alert Level 0.

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Geological Summary for New Zealand Area, November 2008

Monday, January 12th, 2009

Earthquake activity increased slightly during November 2008, but magnitudes were generally lower than events recorded during October. White Island, Mt. Ngauruhoe, and Mt. Ruapehu remained at Alert Level 1.

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Geological Summary for New Zealand Area, October 2008

Wednesday, November 19th, 2008

Earthquake activity continued at a low level, but swarm activity increased. White Island, Mt. Ngauruhoe, and Mt. Ruapehu remained at Alert Level 1.

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Wanganui Earthquakes

Friday, October 17th, 2008

Another earthquake struck off-shore near Wanganui this afternoon, the strongest of three recorded in the area since the beginning of the month.

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Tremors at Tarawera

Friday, October 17th, 2008

Another brief burst of earthquake activity was recorded near Lake Tarawera last night. The mid-evening swarm included a very shallow magnitude 3.3 earthquake that was felt at Rotorua and at several Rotorua lakes.

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Geological Summary for New Zealand Area, September 2008

Wednesday, October 15th, 2008

Earthquake activity continued at a low level, but magnitudes increased. White Island, Mt Ngauruhoe, and Mt Ruapehu remained at Alert Level 1.

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Geological Summary for New Zealand Area, August 2008

Thursday, October 9th, 2008

Earthquake activity continued at a low level. White Island, Mt Ngauruhoe, and Mt Ruapehu remained at Alert Level 1.

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Another Matata Earthquake Swarm

Wednesday, September 3rd, 2008

Earthquake activity near Matata in the Bay of Plenty has reactivated overnight.

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Geological Summary for New Zealand Area, July 2008

Tuesday, August 12th, 2008

Earthquake activity continued at a low level. White Island, Mt. Ngauruhoe, and Mt. Ruapehu remained at Alert Level 1.

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Geological Summary for New Zealand Area, June 2008

Wednesday, July 16th, 2008

Earthquake activity continued at a low level. White Island, Mt Ngauruhoe, and Mt Ruapehu remained at Alert Level 1.

GeoNet, the U.S. Geological Survey and GNS Science detailed 33 earthquakes in the New Zealand area between the Kermadec Islands in the north, and the Auckland Islands to the south during June 2008.

The magnitude distributions were as follows:
M6 to 6.9 (none), M5 to 5.9 (4), M4 to 4.9 (7) M3 to 3.9 (18).
An additional 4 events in the magnitude 2 range were deemed worthy of mention.

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Geological Summary for New Zealand Area, May 2008

Saturday, June 21st, 2008

Earthquake activity declined. White Island, Mt. Ngauruhoe, and Mt. Ruapehu remained at Alert Level 1.

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