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Ruapehu volcano (North Island, New Zealand) activity update

Mi, 7. Nov 2012, 08:07
08:07 AM | VON: T
No unusual activity has been seen recently at Ruhapehu volcano. This is the latest update from GeoNet:
"
The Crater Lake was last hot in December 2011/January 2012 when temperatures rose to over 35 °C. Since then the lake has cooled, reaching about 16 °C in May and has fluctuated between 18 and 24 °C since then. When visited last week the temperature was 19.5 °C. The lake is a blue-green colour with weak convection near the centre.

Ruapehu volcano often has some form of seismic activity associated with it. For the last month weak volcanic tremor has been present on the records and more recently several small earthquakes have occurred under or near the volcano. The largest has been about magnitude 2.

Recently we have also completed a gas flight at Ruapehu. We can detect sulphur dioxide (SO2), carbon dioxide (CO2) and hydrogen sulphide (H2S). On 26 October the gas flux was: sulphur dioxide 63 tonnes per day and carbon dioxide flux 908 tonnes per day."

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Mi, 7. Nov 2012, 06:00
On 5 November, GeoNet reported that Ruapehu's summit Crater Lake was hot during field visits in December 2011 and January 2012, exhibiting temperatures over 35 degrees Celsius. The lake cooled afterwards, reaching 16 degrees in May and fluctuating between 18-24 degrees during June-October. Scientists visited the lake in late October and reported that the water temperature was 19.5 degrees. ... Read all
Mi, 27. Apr 2011, 06:00
On 2 May, GeoNet reported that the temperature of Ruapehu's summit Crater Lake continued to slowly cool and was about 30 degrees Celsius, down from a peak of 41 degrees in March. The lake level remained below the overflow level and no earthquakes had been located within 10 km of the Crater Lake for two weeks. The Aviation Colour Code was lowered to Green and the Volcanic Alert Level remained at 1 (signs of volcano unrest). ... Read all
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