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Ruapehu volcano sat by (c) Google Earth View
Ruapehu volcano sat by (c) Google Earth View
Ruapehu vulkaan
Stratovulkaan 2797 m / 9,176 ft
North Island, New Zealand, -39.28°S / 175.57°E
Current status: normal or dormant (1 out of 5)
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Ruapehu vulkaanuitbarstingen:

Typical eruption style:
Mildly explosive, formation of lahars
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News and activity reports about Ruapehu volcano:

Ruapehu volcano (New Zealand): increased volcanic tremor

Monday Nov 07, 2016 15:23 PM | DOOR: T

Tremor spectrum and amplitude at Ruapehu volcano (GeoNet)
Tremor spectrum and amplitude at Ruapehu volcano (GeoNet)
Volcanic tremor (which is normally present at the volcano) has increased a notch since mid October, but not enough to trigger a raise in alert status of the volcano (which remains at level 1). New Zealand's GNS Science issued a note but does not expect the volcano to erupt soon.
The temperature of the crater lake had again been rising since early September, reaching a maximum of 40ºC on 4 October.

From the original report:
"An increase in the strength of volcanic tremor began on October 18, where a sharp increase was noted before the energy declined a day later. Subsequent tremor increases occurred again on October 25 and 28, and currently remains higher than normal. These tremor pulses do not appear to be related to any variation in the lake temperature. Our records show that similar periods of increased volcanic tremor were present May-June 2016, again when the lake temperature was high. Importantly, no eruptive activity or geysering was noted in Crater Lake during the previous periods of volcanic tremor.

Weather conditions have not been ideal for mountain observations. Nevertheless, our scientists will be visiting the lake to collect water samples for further analysis and making a gas flight when the weather conditions improve.

The active crater at Mt Ruapehu is occupied by Crater Lake and it displays temperatures that typically range between about 15 and 40°C and the phases can last between about 9 and 20 months. The lake cooled to a minimum of 12°C in mid-August and then remained at 13-14°C until early September when it started to heat again and reached a peak of 39.8°C on October 4.

GNS Science volcanologists continue to closely monitor Ruapehu through the GeoNet project. The Volcanic Alert Level for Mt Ruapehu remains at Level 1 (minor volcanic unrest) and the Aviation Colour Code also remains unchanged at Green. The Volcanic Alert Level ranges from 0 to 5 and defines the current status at a volcano. Aviation Colour Codes are based on four colours and are intended for reference only in the international civil aviation community."
Vorig nieuws
Ruapehu's crater lake in August 2016 (image: Geonet)
Friday, Sep 09, 2016
After reaching record-low temperatures in August, the volcano's closely-monitored crater lake has started to heat up very quickly since 2 September, Geonet reported. ... [meer...]
Friday, May 20, 2016
On 17 May GeoNet reported that the lake temperature of Ruapehu's summit Crater Lake had decreased from a high of 46 degrees Celsius to 39 degrees, with some of the decrease attributed to rain and snowfall. ... [meer...]
Friday, May 13, 2016
The alert level of the volcano was raised by a notch from 1 to Level 2 (moderate to heightened unrest) last Wednesday, Geonet informed in a special note. ... [meer...]
Seismic recording at Ruapehu volcano today (Far West station / Geonet)
Saturday, Apr 30, 2016
An earthquake swarm has been occurring at the volcano since 26 April. ... [meer...]
Wednesday, May 13, 2015
The level of seismic activity has decreased. ... [meer...]

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