Ruapehu volcano (North Island, New Zealand) - Smithsonian / USGS Weekly Volcanic Activity Report for 29 April-5 May 2020 (Continuing Activity)
On 4 May GeoNet reported a cooling trend of the crater lake water at Ruapehu with a current temperature of 35 degrees Celsius. During February-April the water temperature had peaked at 42 degrees Celsius. The intensity of volcanic tremor had been weak during the past month after a peak in strength in early March; tremor had declined slowly almost in conjunction with the lake water cooling trend.
Wed, 29 Apr 2020, 06:0006:00 AM | BY: VN
During a visit to the lake the previous week volcanologists noted that the lake was a uniform gray color with a few surface slicks and no obvious upwelling. Since that visit the water level had risen and was flowing into the upper Whangaehu River. The Volcanic Alert Level remained at 1 (minor volcanic unrest) and the Aviation Color Code remained at Green.
From: Global Volcanism Program, 2020. Report on Ruapehu. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 29 April-5 May 2020. Smithsonian Institution and US Geological Survey.
Fri, 20 Mar 2020, 05:56
GNS Science Volcanologists have collected water samples from Crater Lake (Te Wai ā-moe) and the temperature of the lake is now 40°C. GeoNet believe the heating of the lake is the response to an input of hot gases and hydrothermal fluids in the wake of volcanic earthquakes beneath Mt Ruapehu in February. Prior to the earthquakes, the lake measured 24ºC. ... Read all
Tue, 3 Mar 2020, 08:17
GeoNet volcanologists have collected water samples from Crater Lake and measured volcanic gases in the plume last week. Seismic data have been analysed in detail. ... Read all