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Latest news:

Ruapehu volcano today (image: GeoNet)
Tuesday, May 26, 2020
GeoNet reported that the activity at Crater Lake (Te Wai ā-moe) is often dominated by a heating-cooling cycle. These cycles last weeks-to-months. After peaking in April at 42°C, the lake cooled to 35°C by early May. Recent monitoring indicates continuous gas flux which has kept the temperature around 35°C through May. ... [more]
Crater Lake at Ruapehu volcano (image: @geonet/twitter)
Monday, May 04, 2020
GeoNet reported that during February-April, Crater Lake (Te Wai ā-moe) heated slowly to a peak temperature of 42ºC. Due to a heating-cooling cycle, there is a period of slow change before a cooling trend is clearly shown in the data. That trend is now confirmed with current temperatures close to 35ºC, with further slow cooling expected. Colour temperature is grey with a few surface slicks and no obvious upwelling. At that time the water level had dropped to about 30 cm below overflow but following this weekend’s rain the lake is again overflowing into the upper Whangaehu River. ... [more]
 

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 webcams / live data | Reports
Ruapehu volcano books | Tours
Last update: 26 May 2020 (lake temperature remains unchanged since the last update)
Typical eruption style: Mildly explosive, formation of lahars
Ruapehu volcano eruptions: Ruhapehu volcano
TimeMag. / DepthDistanceLocation
Wed, 8 Jul 2020
Wed, 8 Jul 04:09 UTCM 0.911 kmNew Zealand
Wed, 8 Jul 02:12 UTCM 1.0 / 68.2 km10 kmNew Zealand
Wed, 8 Jul 01:38 UTCM 0.9 / 3.9 km11 kmNew Zealand
Tue, 7 Jul 2020
Tue, 7 Jul 05:38 UTCM 2.5 / 131.1 km25 kmNew Zealand
Tue, 7 Jul 04:22 UTCM 1.1 / 5 km11 kmNew Zealand
View all recent quakes
Ruapehu is one of New Zealand's most active volcanoes and forms the highest peak of the North Island. The andesitic stratovolcano has an age of around 200,000 years and contains a large summit crater containing a lake. Eruptions from the vent inside the lake often cause the lake to drain and form dangerous lahars.

Background:

Ruapehu is a complex volcanic edifice constructed over several cycles and has a NNE-SSW elongated shape. The cone is surrounded by a large plain formed by debris from flank collapse and lahar deposits.
A series of very explosive (Plinian) eruptions occurred at Ruapehu between about 22,600 and 10,000 years ago. Since then, only one vent has probably been active, Crater Lake in the summit region. Activity in historic time consisted of mild explosive phreatic and phreatomagmatic eruptions often accompanied by lahars threatening the popular ski area on the volcano as well as structures in the surrounding valleys.
An eruption on 24th December 1953 caused a catastrophic lahar that destroyed a rail bridge 42 km from the volcano, just as the Wellington-Auckland passenger train was crossing and fell into the valley, causing 151 fatalities.


Latest satellite images


See also: Sentinel hub | Landsat 8
 

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