Archive for October, 2007

Ruapehu Alert Downgrade

Wednesday, October 10th, 2007

GNS Science downgraded the alert status for Mt. Ruapehu yesterday, following the absence of eruptive activity since September 25th.

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September 2007 Cooler, Wetter

Tuesday, October 9th, 2007

Tawa’s climate during September 2007 was cooler and wetter than the previous two Septembers. Low cloud and fog were recorded on more days last year but otherwise, apart from September 2003 which was particularly wet, September 2007 was typical for the time of year.

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Earthquakes Near Hanmer

Sunday, October 7th, 2007

32 earthquakes have been recorded about 40 km north of Hanmer Springs in the South Island since the magnitude 5.6 quake of October 4th.

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Oh What a Night

Saturday, October 6th, 2007

Late September back in ’63….
Oooops, that’s the song not the weather.
Another night of gale-force winds has given a few of us a night of broken sleep. If it wasn’t the rising sound of the big gusts or the sound of things blowing around the neighbourhood, it was the rat’s-tail tree joining the party by throwing missiles onto the roof.

So, after a week of cabin fever induced by lurking indoors with rabid school-holiday kids, parents might be looking for a bit of whimsy…

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Strong Quake, Northern Kermadecs

Friday, October 5th, 2007

A strong, very deep earthquake struck the northern part of the Kermadec Islands last evening, Friday 5th October 2007. The magnitude 6.3 earthquake, which struck at 8:18 p.m., was located 530 km north-north-west of Raoul Island at a depth of 508 km.

[Compiled from data supplied by the US Geological Survey and its contributing agencies.]

Increased Quake Activity, New Zealand

Friday, October 5th, 2007

Earthquake activity in New Zealand has continued at an increased level during the first 4 days of October 2007.

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The Puysegur Trench Quakes of 30-9-2007 – Part 3

Thursday, October 4th, 2007

Problems and Solutions

Two large earthquakes in the Puysegur Trench on the evening of Sunday 30th September 2007 required a number of New Zealand government agencies to carry out their responsibilities for assessing, reporting and managing the risk to life and property. These agencies are also responsible for developing and deploying the technology that allows them to fulfill their tasks.

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The Puysegur Trench Quakes of 30-9-2007 – Part 2

Wednesday, October 3rd, 2007

How They Were Managed

Two large earthquakes in the Puysegur Trench on the evening of Sunday 30th September 2007 required a number of New Zealand government agencies to carry out their responsibilities for assessing, reporting and managing the risk to life and property.

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Puysegur Activity Eases

Tuesday, October 2nd, 2007

Earthquake Activity in the Puysegur Trench following the large quakes of Sunday night appears to be declining at a typical rate.

Four of the events have been documented by the US Geological Survey, including the magnitude 7.3 and 6.8 quakes of Sunday night.

Seismographs indicate that about 8 earthquakes occurred in the area in the 24 hours to midday today, Tuesday 2nd October 2007, judging by the characteristics of the traces. This includes a magnitude 5.0 event at 2:35 a.m. and a magnitude 4.9 quake at 5:20 a.m.

If the series of quakes is a normal mainshock/aftershock series, activity will continue to decline over the next few days as the area around the plate boundary adjusts to the stresses altered by the larger quakes.

[Compiled from data supplied by the US Geological Survey and its contributing agencies.]

The Puysegur Trench Quakes of 30-9-2007 – Part 1

Monday, October 1st, 2007

Part 1 – What Happened
Two large earthquakes struck the Puysegur Trench in the Southern Ocean south of New Zealand on the evening of 30th September 2007.

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Southern Ocean Earthquakes

Monday, October 1st, 2007

Data on the two earthquakes in the Southern Ocean last night New Zealand time are as follows:

Sunday 30th September 2007, 6:24 p.m. New Zealand Daylight Time
Magnitude 7.3
11 km deep
Location: 200 km north-west of Auckland Islands, 475 km south-west of Invercargill

Sunday 30th September 2007, 10:48 p.m. New Zealand Daylight Time
magnitude 6.6
10 km deep
Location: 240 km west-north-west of Auckland Islands, 505 km south-west of Invercargill.

The events were another close call for New Zealand, and the shambolic response by GNS Science, NIWA and the Ministry of Civil Defence should make us grateful that they weren’t closer.

[Compiled from data supplied by the US Geological Survey and its contributing agencies.]