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Ruapehu vulcano

Aggiornato: 26 nov. 2022 10:30 GMT -
Stratovolcano 2797 m / 9,176 ft
Isola del nord (New Zealand), -39.28°S / 175.57°E
Stato attuale: normal or dormant (1 di 5)
Last update: 5 ott 2022 (low-level seismic unrest continues)
Ruhapehu volcano
Ruhapehu volcano

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.

Mostra la mappa interattiva
Stile eruttivo tipico: Mildly explosive, formation of lahars
Eruzioni del vulcano Ruapehu:

Latest nearby earthquakes

Data / oraMag. / Prof.Distanza/Ubicazione
venerdì, 25 novembre 2022 GMT (1 sismo)
26 nov 2022 12:04 (GMT +13) (25 nov 2022 23:04 GMT)
1.4

23 km
35 km (22 mi)
New Zealand
venerdì, 18 novembre 2022 GMT (1 sismo)
19 nov 2022 01:45 (GMT +13) (18 nov 2022 12:45 GMT)
1.3

22 km
30 km (19 mi)
New Zealand

Sfondo

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.
On 24th December 1953, a tephra dam holding in the crater lake failed passively, hence the lake drained to produce 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.


See also: Sentinel hub | Landsat 8 | NASA FIRMS
Wed, 5 Oct 2022, 04:06

Ruapehu volcano (New Zealand): low-level seismic unrest continues

Mt Ruapehu's Crater Lake (Te Wai ā-moe) (image: GNS)
The volcanic tremor at the volcano continues at low levels over the past 3 months. ... Read all
Wed, 6 Jul 2022, 14:00

Ruapehu volcano (North Island, New Zealand) - Smithsonian / USGS Weekly Volcanic Activity Report for 29 June-5 July 2022 (Continuing Activity)

On 4 July GeoNet reported that analysis of water from Ruapehu's cater lake confirmed that there is no interaction between magma and the hydrothermal system that drives composition, level, and temperature of the lake. New magma that had intruded over the previous 2-3 months had stopped moving. Tremor had declined to near background levels and gas emission rates were generally low. ... Read all
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