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lun, 2 nov 2015, 06:58
Seismic activity at Colo Una Una volcano during the past months
A recent period of volcanic unrest seems to be over. Seismic activity has decreased and VSI lowered its alert level back to green (normal) last week. ... leggere tutti

Una Una Volcano Photos

stratovulcano 507 m / 1,663 ft
Nord Sulawesi, Indonesia, -0.17°S / 121.61°E
Onset of an eruption: at first, pressurized gasses escape from the outer margin of the plug of solid lava plugging the circular vent, creating an initial ring of ash. (Photo: Tom Pfeiffer)
Onset of an eruption: at first, pressurized gasses escape from the outer margin of the plug of solid lava plugging the circular vent, creating an initial ring of ash. (Ph...
At the moment of the collapse of the hornito, the lens (300mm) was pointed to an area immediately left of it, and this and the next photo show the "missing" left half of the hornito seconds after its collapse.  (Photo: Tom Pfeiffer)
At the moment of the collapse of the hornito, the lens (300mm) was pointed to an area immediately left of it, and this and the next photo show the "missing" left half of ...
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immagine trovata in: Spattering dallo sfiato est in Pu'u ' O'o cratere (luglio 2007)
... e in: Foto del giorno
The cone of Mt Marow volcano on Nguna Island (Photo: Tom Pfeiffer)
The cone of Mt Marow volcano on Nguna Island (Photo: Tom Pfeiffer)
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immagine trovata in: Vanuatu maggio 2009: antenne
On top of the world... Our team member Ulla Lohmann is happy to have reached the world's highest volcano with almost 7000 m.
Ojos del Salado at 6893 m is the highest volcano of the world, the highest mountain of Chile and the second highest mountain in the world outside the Himalaya. The climb success rate is about 25%, and climbers can face extreme conditions at the top, wind gusts of up to 200 km/h and temperatures down to -30 deg C are nothing unusual here.
The volcano is located in the highest desert of the world, the Puna de Atacama, where still many remnants of the Incas can be found. They constructed offering platforms for sacrifice rituals (incl. human sacrifices) at an altitude of 6739 m!  (Photo: Basti Hoffmann)
On top of the world... Our team member Ulla Lohmann is happy to have reached the world's highest volcano with almost 7000 m.
Ojos del Salado at 6893 m is the highes...
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immagine trovata in: Foto del giorno
... e in: Foto della settimana
Nguna Island, little Pele Island and a small part of Efate Island in the background. (Photo: Tom Pfeiffer)
Nguna Island, little Pele Island and a small part of Efate Island in the background. (Photo: Tom Pfeiffer)
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immagine trovata in: Vanuatu maggio 2009: antenne
Red chilli is an essential ingredient and spice for the Ethiopian cuisine. It is ground into a spicy red powder. (Photo: Tom Pfeiffer)
Red chilli is an essential ingredient and spice for the Ethiopian cuisine. It is ground into a spicy red powder. (Photo: Tom Pfeiffer)
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immagine trovata in: Etiopia Nov-dic 2008: impressioni dagli altopiani
Natural sauna at Emborion - volcanically heated steam. (c)
Natural sauna at Emborion - volcanically heated steam. (c)
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immagine trovata in: Isola di Nissiros, marzo 2008: villaggi
The group from before is trying to descend back along the old route, but will have to give up: the section beyond the rocks visible in the background is now a steep, smooth slope of hardened ash with no grip. (Photo: Tom Pfeiffer)
The group from before is trying to descend back along the old route, but will have to give up: the section beyond the rocks visible in the background is now a steep, smoo...
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immagine trovata in: Ol Doinyo Lengai vulcano (Tanzania) - eruzioni di cenere (18 gennaio 2008)

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