Ruapehu volcano (North Island, New Zealand) activity update: seismic unrest recorded since the last update
Mo, 24. Feb 2020, 07:2707:27 AM | VON: MARTIN
GeoNet reported that seismographs detected a sequence of seismic events beneath Mt Ruapehu during 22-23 February. GNS Science volcanologists have categorised them as volcanic earthquakes. The larger events at the start of the episode are approximately magnitude 1.5 and later, smaller events are too small to be located by GeoNet's earthquake detection-location system.
Ruapehu volcano today (image: Geonet)
The seismic recordings indicate a source beneath the summit area, which is normal for volcanic earthquakes and volcanic tremor at Ruapehu. The earthquake episode has ended.
The Crater Lake (Te Wai ā-moe) temperature has been around 24-25 ºC for the last few months. It is not unusual to observe volcanic earthquakes on Ruapehu and other episodes of increased seismic activity were observed during March 2018, April 2016 and September 2017. None of these resulted in a sustained increase in volcanic unrest.
Both the Volcanic Alert Level (level 1) and Aviation Code (Green) remain unchanged.
Source: GeoNet New Zealand volcano activity update 24 February 2020
Mi, 15. Jan 2020, 09:30
GeoNet reported that the activity of volcanic tremor continues at low levels. Measurements of the volcano's Crater Lake (Te Wai ā-moe) temperature, and chemistry remained consistent in combination with seismic unrest. ... Read all
Mi, 24. Apr 2019, 06:00
Ruapehu volcano (North Island, New Zealand) - Smithsonian / USGS Weekly Volcanic Activity Report for 24 April-30 April 2019 (Continuing Activity)
GeoNet reported that the period of high water temperatures at Ruapehu's summit Crater Lake along with elevated tremor levels was over. Tremor levels began to decline on 16 April and by 29 April was described as weak. The lake water reached a peak temperature of 44 degrees Celsius on 19 April and then began cooling; the temperature was 39 degrees Celsius by 29 April. ... Read all