Archive for the ‘Eruptions – Observations’ Category

Mt. Ruapehu’s Unrest Declines

Tuesday, July 22nd, 2008

Cooling of the hydrothermal system at Mt. Ruapehu indicates that the recent period of unrest is drawing to a close. Crater lake temperatures have fallen, gas emission are reduced and volcanic tremor has declined.


Unrest Continues at Mt. Ruapehu

Thursday, June 19th, 2008

Increased gas output and continued high lake temperatures at Mt. Ruapehu show that the volcano has continued to be active since its last eruption.


Situation Normal at White Island

Wednesday, June 18th, 2008

White Island volcano has not reacted significantly to Friday’s nearby earthquake, and activity noted since is thought to be normal behaviour for the volcano.


GeoNet Site Expands Volcano Coverage

Wednesday, May 28th, 2008

GeoNet has changed its volcano webcam and drum page, allowing it to extend coverage to another eight locations regularly monitored by New Zealand’s vulcanologists.


Elevated Unrest at Mt. Ruapehu

Tuesday, May 13th, 2008

Tuesday May 13, 2008: GNS Science issued an alert bulletin for Mount Ruapehu this morning.


Increased Activity at Mt. Ruapehu

Thursday, April 24th, 2008

GNS Science issued an alert bulletin for Ruapehu volcano yesterday, the 23rd of April 2008, reporting increased activity.


Earthquakes at Mt. Ngauruhoe

Saturday, January 19th, 2008

Shallow earthquake activity on the northern flank of Ngauruhoe volcano, which began in May 2006, has increased.


White Island Earthquakes

Saturday, December 15th, 2007

Dozens of small-to-moderate sized earthquakes which have struck near White Island volcano since late November seem to have caused only minor changes to the hydrothermal system on the island.


Earthquakes Near White Island

Friday, November 23rd, 2007

A burst of earthquake activity near White Island has prompted Geonet to issue an alert bulletin for the volcano.


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.


Ruapehu Eruption and Quakes at Matata

Wednesday, September 26th, 2007

Mt. Ruapehu in the central North Island erupted at 8:23 p.m. on Tuesday September 25th 2007. Within a few hours, activity associated with the earthquake swarm near Matata in the Bay of Plenty increased.


Earthquake Swarm, Hawaii

Monday, June 18th, 2007

The largest island in the Hawaii chain, Hawaii (known to locals as The Big island), has experienced an earthquake swarm this morning.

The 65 quakes reported by the US Geological Survey are occurring at shallow depths on the south-eastern flank of one of the planet’s most active volcanoes – Kilauea volcano.


Rapid Decline in Crater Lake at White Island

Friday, May 4th, 2007

The level of the crater lake at White Island volcano has dropped rapidly during March and April. At the beginning of March 2007, the lake was 9 metres below overflow, but this has rapidly declined by 19 metres.


Increased Activity, Ruapehu Volcano

Tuesday, March 20th, 2007

Volcanic earthquake activity at Mt. Ruapehu has increased since Sunday’s lahar, indicating that there may be a consequent increase in activity within the crater lake over the next few days to weeks.


Bigger Than ’95, Smaller Than Tangiwai

Monday, March 19th, 2007

Yesterday’s lahar on Mt Ruapehu has been described as bigger than the lahar that followed Ruapehu’s 1995 eruption but smaller than the destructive Tangiwai lahar of 1953 that claimed 151 lives.