Expédition au Vanuatu, mai 2009: le cratère du Benbow (Ambrym)

En mai 2009, ont atteint des niveaux de lave à l'intérieur les conduits du volcan d'Ambrym, alimentation forte activité d'éclaboussures et type de lave faible à l'intérieur les évents du cratère Benbow. Favorisée par des conditions météorologiques exceptionnelles, nous avons pu descendre dans les vues exceptionnellement clairs cratère et ont des murs intérieurs cratère, les évents ainsi son activité spectaculaire. Photos ont été prises lors de notre récente expédition à Vanuatu le 24 mai 2009.
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The Benbow crater rising above the ash plain. (Photo: Tom Pfeiffer)
The Benbow crater rising above the ash plain. (Photo: Tom Pfeiffer) [info]
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The outer flanks of Benbow crater carved by hundreds of erosion gullies.  (Photo: Tom Pfeiffer)
The outer flanks of Benbow crater carved by hundreds of erosion gullies. (Photo: Tom Pfeiffer) [info]
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The trail up to the crater rim follows a ridge between two erosion gullies. (Photo: Tom Pfeiffer)
The trail up to the crater rim follows a ridge between two erosion gullies. (Photo: Tom Pfeiffer) [info]
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Erosion gullies of Benbow crater (Photo: Tom Pfeiffer)
Erosion gullies of Benbow crater (Photo: Tom Pfeiffer) [info]
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Joachim abseils into the Benbow crater. (Photo: Tom Pfeiffer)
Joachim abseils into the Benbow crater. (Photo: Tom Pfeiffer) [info]
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The active vents inside Benbow crater surrounded by circular crater walls. (Photo: Tom Pfeiffer)
The active vents inside Benbow crater surrounded by circular crater walls. (Photo: Tom Pfeiffer) [info]
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Spattering from the south pit vent. (Photo: Tom Pfeiffer)
Spattering from the south pit vent. (Photo: Tom Pfeiffer) [info]
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Highly fluid lava bursts from the vent of Benbow, Ambrym volcano, Vanuatu (Photo: Tom Pfeiffer)
Highly fluid lava bursts from the vent of Benbow, Ambrym volcano, Vanuatu (Photo: Tom Pfeiffer) [info]
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A bursting lava bubble throws out a fountain of liquid spatter. (Photo: Tom Pfeiffer)
A bursting lava bubble throws out a fountain of liquid spatter. (Photo: Tom Pfeiffer) [info]
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Spatter falling back to the ground (Photo: Tom Pfeiffer)
Spatter falling back to the ground (Photo: Tom Pfeiffer) [info]
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South and north pits inside the Benbow crater. (Photo: Tom Pfeiffer)
South and north pits inside the Benbow crater. (Photo: Tom Pfeiffer) [info]
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Spattering in the south pit crater. (Photo: Tom Pfeiffer)
Spattering in the south pit crater. (Photo: Tom Pfeiffer) [info]
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The active craters of Benbow at dusk. (Photo: Tom Pfeiffer)
The active craters of Benbow at dusk. (Photo: Tom Pfeiffer) [info]
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Le groupe perché sur une saillie au-dessus des cratères. (Photo: Tom Pfeiffer)
Le groupe perché sur une saillie au-dessus des cratères. (Photo: Tom Pfeiffer) [info]
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Our group's perfect observation spot inside Benbow's crater.  (Photo: Tom Pfeiffer)
Our group's perfect observation spot inside Benbow's crater. (Photo: Tom Pfeiffer) [info]
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Ronny photographing the lava activity in the crater of Benbow. (Photo: Tom Pfeiffer)
Ronny photographing the lava activity in the crater of Benbow. (Photo: Tom Pfeiffer) [info]
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The glow from the lava lake inside the north vent. (Photo: Tom Pfeiffer)
The glow from the lava lake inside the north vent. (Photo: Tom Pfeiffer) [info]
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Liquid spatter is ejected several meters above the crater rim of the south pit when larger gas bubbles burst at the surface of the lava lake. (Photo: Tom Pfeiffer)
Liquid spatter is ejected several meters above the crater rim of the south pit when larger gas bubbl... [info]
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Strong spattering at the south pit. (Photo: Tom Pfeiffer)
Strong spattering at the south pit. (Photo: Tom Pfeiffer) [info]
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View of the active south pit with a little lava fountain (Benbow volcano, Ambrym, Vanuatu) (Photo: Tom Pfeiffer)
View of the active south pit with a little lava fountain (Benbow volcano, Ambrym, Vanuatu) (Photo: T... [info]
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Weathered blocks that have fallen down from the steep inner crater walls and a black layer of freshly ejected lapilli and spatter around the vent. (Photo: Tom Pfeiffer)
Weathered blocks that have fallen down from the steep inner crater walls and a black layer of freshl... [info]
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The south and north pit craters containing little lava lakes. Spattering from the south vent is well visible, while the north pit is too deep for us to see the lava inside. (Photo: Tom Pfeiffer)
The south and north pit craters containing little lava lakes. Spattering from the south vent is well... [info]
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Les cratères d'effondrements sud(l) et nord (r) contiennent des petits lacs de lave. Forte éclaboussure de lave issue du cratère sud. (Photo: Tom Pfeiffer)
Les cratères d'effondrements sud(l) et nord (r) contiennent des petits lacs de lave. Forte éclabouss... [info]
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Exploding lava bubbles eject very fluid spatter - Benbow volcano, Ambrym, Vanuatu (Photo: Tom Pfeiffer)
Exploding lava bubbles eject very fluid spatter - Benbow volcano, Ambrym, Vanuatu (Photo: Tom Pfeiff... [info]
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Spattering from the S vent (Photo: Tom Pfeiffer)
Spattering from the S vent (Photo: Tom Pfeiffer) [info]
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The north and south pits of Benbow crater in the evening. (Photo: Tom Pfeiffer)
The north and south pits of Benbow crater in the evening. (Photo: Tom Pfeiffer) [info]
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The active craters inside Benbow crater, glowing in the evening. (Photo: Tom Pfeiffer)
The active craters inside Benbow crater, glowing in the evening. (Photo: Tom Pfeiffer) [info]
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An usually clear view of the interior of Benbow's crater in the evening. (Photo: Tom Pfeiffer)
An usually clear view of the interior of Benbow's crater in the evening. (Photo: Tom Pfeiffer) [info]
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Wide-angle view of Benbow's crater in the evening twilight. (Photo: Tom Pfeiffer)
Wide-angle view of Benbow's crater in the evening twilight. (Photo: Tom Pfeiffer) [info]
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The lava glow is so intense that the cloud above the crater is illuminated. (Photo: Tom Pfeiffer)
The lava glow is so intense that the cloud above the crater is illuminated. (Photo: Tom Pfeiffer) [info]
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The group observing the lava lakes at night, when the crater is only illuminated by the red lava glow. (Photo: Tom Pfeiffer)
The group observing the lava lakes at night, when the crater is only illuminated by the red lava glo... [info]
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The crater of Bembow illuminated by its lava lakes at night. (Photo: Tom Pfeiffer)
The crater of Bembow illuminated by its lava lakes at night. (Photo: Tom Pfeiffer) [info]
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