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Ruapehu volcano (North Island, New Zealand) activity update: seismic unrest recorded since the last update

Mon, 24 Feb 2020, 07:27 07:27 AM | BY: MARTIN
Ruapehu volcano today (image: Geonet)
Ruapehu volcano today (image: Geonet)
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.
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

Previous news

Wed, 15 Jan 2020, 09:30

Ruapehu volcano (North Island, New Zealand) activity update: new seismic unrest recorded

Ruapehu volcano today (image: Geonet)
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
Wed, 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
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Ruapehu volcano sat by (c) Google Earth View
Ruapehu volcano sat by (c) Google Earth View
Ruapehu volcano
Stratovolcano 2797 m / 9,176 ft
North Island (New Zealand), -39.28°S / 175.57°E
Current status: normal or dormant (1 out of 5) Ruapehu volcano eruptions:

Typical eruption style
Mildly explosive, formation of lahars
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