Ruapehu volcan

Stratovolcano 2797 m / 9,176 ft
North Island, Neuseeland, -39.28°S / 175.57°E
Condition actuelle: normal / en sommeil (1 sur 5)
Last update: 28 sept. 2021 (Crater Lake's fluctuating temperatures continue, currently cooling)
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.

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Style éruptif tipique: Mildly explosive, formation of lahars
Eruptions du volcan Ruapehu:

HeureMag. / ProfondeurDistance/Lieu
mardi, 19. octobre 2021 09:56 GMT (1 séisme)
19 oct. 2021 22:56 (GMT +13) (19. oct. 2021 09:56 GMT)

5 km
48 km (30 mi)
New Zealand
lundi, 18. octobre 2021 21:13 GMT (1 séisme)
19 oct. 2021 10:13 (GMT +13) (18. oct. 2021 21:13 GMT)

23 km
49 km (30 mi)
New Zealand
mardi, 12. octobre 2021 04:32 GMT (1 séisme)
12 oct. 2021 17:32 (GMT +13) (12. oct. 2021 04:32 GMT)

113 km
48 km (30 mi)
District de Ruapehu, Manawatu-Wanganui, Nouvelle-Zélande
vendredi, 8. octobre 2021 23:00 GMT (1 séisme)
9 oct. 2021 12:00 (GMT +13) (8. oct. 2021 23:00 GMT)

18 km
46 km (29 mi)
District de Ruapehu, 61 km au nord de Whanganui, Nouvelle-Zélande


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
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