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Random pictures
Ruapehu volcano sat by (c) Google Earth View
Ruapehu volcano sat by (c) Google Earth View
Ruapehu volcano
Stratovolcano 2797 m / 9,176 ft
North Island, New Zealand, -39.28°S / 175.57°E
Current status: normal or dormant (1 out of 5)
Ruapehu webcams / live data | Reports
Ruapehu volcano books | Tours
Ruapehu volcano eruptions:

Typical eruption style:
Mildly explosive, formation of lahars
Last earthquakes nearby
Latest satellite images

News and activity reports about Ruapehu volcano:

Ruapehu volcano (New Zealand): signs of unrest, alert level raised

Friday Nov 16, 2012 07:51 AM | BY: T

New Zealand scientists monitoring Ruapehu volcano detected signs of increased volcanic unrest and raised the alert level of the volcano. The likelihood of new eruptions over the next weeks to months has increased, GNS Science said in their latest press release.

GNS scientists recorded increasing numbers of small earthquakes about 5 km beneath the summit area of Ruapehu, and think that the temperature at vents at the bottom of the lake is around 800 deg C, although the lake itself is only 20 deg C and has decreased its temperature since January this year.

"This suggests the vent is partly blocked which may be leading to a pressure build-up beneath Crater Lake. A sudden release of the pressure may lead to an eruption", GeoNet writes.
Links / Sources:
Previous news
Wednesday, Nov 07, 2012
No unusual activity has been seen recently at Ruhapehu volcano. This is the latest update from GeoNet: ... [more]
Thursday, Mar 10, 2011
Ruapehu volcano who last erupted in 1995-96 might be heading towards a new eruptive cycle. The temperature of the crater lake has increased to 40C and other indicators such as seismicity and deformation all point towards a gradual reawakening. [more]
Saturday, Jun 21, 2008
Elevated gas output and high lake temperatures continue, while volcanic tremor has declined. Unrest continues at Ruapehu and it remains unclear if this is a sign of further eruptions. The volcano last erupted on September 25 2007. The Alert Level remains at Level 1. ... [more]
Thursday, Oct 18, 2007
The Alert Level at Ruapehu was lowered to 1 (on a scale of 0-5) on 9 October because no further eruptions have occurred since the activity on 25 September. [more]
Sunday, Mar 18, 2007

Sunday morning at 10:47 am local time, a section of Ruapehu volcano's crater walls collapsed under the pressure of the crater lake. The sudden draining of the lake caused a devastating lahar that travelled down from its altitude at 2500 m to sea level. Fortunately, the flash flood of mud drained through a river channel and no people were injured or killed. Authorities closed roads and the nation's main trunk rail track near the southern base of the mountain on New Zealand's North Island.
A similar event happened in 1953 killed when a lahar killed 151 people when it washed away a rail bridge, plunging a passenger train into the raging torrent of mud.


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