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Diaporama
Raikoki volcan
stratovolcan 551 m / 1,808 ft
Kuriles centrales, Iles Kuriles, 48.29°N / 153.25°E
Condition actuelle: normal / en sommeil (1 sur 5)| Reports
Raikoki livres
Eruptions du volcan Raikoki:
1924, 1778, 1765
Style éruptif tipique:
explosive
Derniers séismes proches
Derniers images satellite

 

Raikoke volcano news & activity updates:

Raikoke volcano (Kurile Islands): incredible image of eruption column from space showing gravity waves

Tuesday Jun 25, 2019 15:03 PM | AUTEUR : T

View of the vertically rising and expanding plume head during the peak phase of the eruption of Raikoke volcano during 21-22 June, 5th or 6th explosive phase (image: NASA Earth))
View of the vertically rising and expanding plume head during the peak phase of the eruption of Raikoke volcano during 21-22 June, 5th or 6th explosive phase (image: NASA Earth))
NASA published an amazing photograph of the circular eruption column topping out at around 43,000 ft (13 km) altitude, during the peak phase of activity around noon of 22 June (local time).
It beautifully displays circular gravity waves in the plume head created by the overshooting and falling back of the ash-gas mixture of the plume at maximum height, where the plume's buoyancy has decreased to zero in the thinner atmosphere at altitude.
These waves are similar to the circular waves created on the water surface when an small object, e.g. a stone falls into it and causes a local displacement of the water that then spreads out in expanding circles..
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Source:
Actualités précédentes
The ash column rising above the summit.
Tuesday, Jun 25, 2019
We finally have information about the situation on the ground, courtesy of a ship that was passing in the area during the large eruption on Sunday. As expected, there is a lot of damage! ... [details]
Satellite image of Raikoke volcano on 25 Jun 2019
Tuesday, Jun 25, 2019
Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo warned about a volcanic ash plume that rose up to estimated 38000 ft (11600 m) altitude or flight level 380 and is moving at 20 kts in NNE direction. ... [details]
Tuesday, Jun 25, 2019
Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo warned about a volcanic ash plume that rose up to estimated 38000 ft (11600 m) altitude or flight level 380 and is moving at 20 kts in NNE direction. ... [details]
Monday, Jun 24, 2019
Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo warned about a volcanic ash plume that rose up to estimated 38000 ft (11600 m) altitude or flight level 380 and is moving at 25 kts in NE direction. ... [details]
Monday, Jun 24, 2019
Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Anchorage warned about a volcanic ash plume that rose up to estimated 38000 ft (11600 m) altitude or flight level 380 and is moving at 25 kts in NNE direction. ... [details]

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