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Eruzione Anak Krakatau 2007: principalmente cenere - pennacchi di cenere di sfiato e potente cenere

Il tipo più frequente di attività era cenere di sfiato, che si verificano ad intervalli di 2 minuti in genere, ma i pennacchi risultanti erano nubi di cenere relativamente basso. Alcuni dei più potenti esplosioni prodotto alti pennacchi di altezza di oltre 1 km.
Ash venting: this was the most frequent type of activity we observed during our expedition. Such emissions of dense billowing ash clouds were occurring at very regular intervals of approximately 2 minutes. These are probalbly related to deep-seated explosive phreatomagmatic activity. (Photo: Tom Pfeiffer)
Ash venting: this was the most frequent type of activity we observed during our expedition. Such emi... [info]
(3559 visti)
Typical ash venting from the new crater. (Photo: Tom Pfeiffer)
Typical ash venting from the new crater. (Photo: Tom Pfeiffer) [info]
(4060 visti)
Regular pulses of ash create a series of ash plumes all drifting in the same direction eastward. (Photo: Tom Pfeiffer)
Regular pulses of ash create a series of ash plumes all drifting in the same direction eastward. (Ph... [info]
(4566 visti)
Normal ash venting at dawn of 25 November. (Photo: Tom Pfeiffer)
Normal ash venting at dawn of 25 November. (Photo: Tom Pfeiffer) [info]
(3606 visti)
Ash rich explosion early on 22 Nov. (Photo: Tom Pfeiffer)
Ash rich explosion early on 22 Nov. (Photo: Tom Pfeiffer) [info]
(3680 visti)
Weak explosions and near-continuous spattering from the vent in the lower left of the crater; only minor amounts of ash are produced. (22 Nov evening)  (Photo: Tom Pfeiffer)
Weak explosions and near-continuous spattering from the vent in the lower left of the crater; only m... [info]
(3763 visti)
23 Nov evening: the usual thunderstorms over Sumatra illuminate the sky to the west while Krakatau is venting ash. (Photo: Tom Pfeiffer)
23 Nov evening: the usual thunderstorms over Sumatra illuminate the sky to the west while Krakatau i... [info]
(3604 visti)
krakatau_e33099.jpg (Photo: Tom Pfeiffer)
krakatau_e33099.jpg (Photo: Tom Pfeiffer) [info]
(3581 visti)
krakatau_e33072.jpg (Photo: Tom Pfeiffer)
krakatau_e33072.jpg (Photo: Tom Pfeiffer) [info]
(3635 visti)
krakatau_e33110.jpg (Photo: Tom Pfeiffer)
krakatau_e33110.jpg (Photo: Tom Pfeiffer) [info]
(5746 visti)
Ash plume from an eruption at Krakatau and fishing boats (Photo: Tom Pfeiffer)
Ash plume from an eruption at Krakatau and fishing boats (Photo: Tom Pfeiffer) [info]
(5838 visti)
23 Nov evening: thick ash plumes rise from the eruptions under a full-moon sky. (Photo: Tom Pfeiffer)
23 Nov evening: thick ash plumes rise from the eruptions under a full-moon sky. (Photo: Tom Pfeiffer... [info]
(3623 visti)
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