News and activity reports about Ruapehu volcano:
Ruapehu volcano (New Zealand): seismic unrest, crater lake temperature decreases
Intermittent moderate to strong volcanic tremor has been observed at the volcano during the past 2-3 weeks, GNS Science reported. The seismic activity is among the strongest observed in the past 8 years.
Sun, 3 May 2015, 22:4622:46 PM | BY: T
The temperature of the crater lake declined a bit to from its peak of over 40°C in late January–early February 2015 to about 31°C in mid March and is now at 37-39°C.
from the GeoNet report:
"...We have not observed any other changes at the Crater Lake.
Over the last 2-3 weeks we have been recording intermittent moderate to strong levels of volcanic tremor at Mt Ruapehu, which has been some of the strongest we have seen in the last 8 years. The signals are similar to those in 2006 and 2007 but weaker than those recorded in 1994/1995.
Historically we have not seen a direct relationship between volcanic tremor and discrete volcanic eruptions or sequences of eruptions. However it is one of those signals often present before, during or after enhanced volcanic unrest. Mt Ruapehu remains at Volcanic Alert Level 1 (minor unrest)."
Links / Sources:
Links / Sources:
Thu, 5 Feb 2015, 20:00
The crater lake temperature has been increasing since early December 2014, rising from 15 to over 40 deg C. This is not seen as a sign that an eruption is to be expected in the near futures and the alert level remains at level 1, meaning minor unrest only. ... read all
Wed, 3 Dec 2014, 18:48
Recent measurements by NZ scientists indicate that the volcano's crater lake is currently in a cooling trend. At 15 deg C, it has the lowest temperature recorded since April 2010. ... read all
Sat, 13 Apr 2013, 05:50
GNS reported that "the temperature of Crater Lake has started to rise and has now reached 30°C. It has been accompanied by some minor volcanic tremor. The chemistry data from our last sampling trip confirms the decline of temperature in the deep geothermal system. read all
Tue, 12 Mar 2013, 11:22
The latest lake water temperatures readings and seismic recordings showed no particular signs of unrest in recent weaks and the volcanic alert status level has been reduced back to normal=green. ... read all
Tue, 5 Mar 2013, 11:24
Unrest at the volcano is decreasing. GNS scientists have been able to confirm that the temperatures at depth of the crater lake have started to decline, although still remain elevated. ... read all