Ruapehu volcano (North Island, New Zealand) - Smithsonian / USGS Weekly Volcanic Activity Report for 20 April-26 April 2011 (New Activity / Unrest)
On 18 April, GeoNet reported that the temperature of Ruapehu's summit Crater Lake was slowly cooling and decreased to 33-34 degrees Celsius from a peak of 41 degrees in March. A general decline of activity had been noted since 4 April, including lower carbon dioxide gas flux, less seismicity, modest change in the Crater Lake water chemistry, and cessation of lake overflow accompanying the start of the cooling trend. The Aviation Colour Code remained at Yellow and the Volcanic Alert Level remained at 1 (signs of volcano unrest).
Wed, 20 Apr 2011, 06:0006:00 AM | BY: VN
From: Global Volcanism Program, 2011. Report on Ruapehu. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 20 April-26 April 2011. Smithsonian Institution and US Geological Survey.
Wed, 30 Mar 2011, 06:00
Ruapehu volcano (North Island, New Zealand) - Smithsonian / USGS Weekly Volcanic Activity Report for 30 March-5 April 2011 (New Activity / Unrest)
On 5 April, GeoNet reported that the temperature of Ruapehu's summit Crater Lake had been high for a sustained period and was currently between 38 and 39 degrees Celsius. The highest temperature since unrest began in October 2010 was 41 degrees Celsius, measured on 1 March. The report also noted that during the previous few weeks there was an increase in carbon dioxide gas emissions, increased seismicity, and changes in Crater Lake water chemistry. ... Read all
Thu, 10 Mar 2011, 08:40
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. ... Read all