Erta Ale volcano: November 2009

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The rising full moon over the active lava lake. (Photo: Tom Pfeiffer)
The rising full moon over the active lava lake. (Photo: Tom Pfeiffer) [info]
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Watching the lava lake at night (Photo: Tom Pfeiffer)
Watching the lava lake at night (Photo: Tom Pfeiffer) [info]
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Erta Ale volcano's lava lake back in Nov 2009.  
The red glow of the lava illuminates the crater walls under the blue sky of dusk. A small group of observers is on the left crater rim. 
During the past 7 years, the lava lake has gradually risen. As of now (Dec 2016), the lava lake has completely filled the pit crater and constructed a new shield by ongoing overflows.  (Photo: Tom Pfeiffer)
Erta Ale volcano's lava lake back in Nov 2009.
The red glow of the lava illuminates the crat... [info]
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A larger group (one of those who only stay a few hours) has joined us for a little while...  (Photo: Tom Pfeiffer)
A larger group (one of those who only stay a few hours) has joined us for a little while... (Photo:... [info]
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The caldera of Erta Ale with the active lava lake beneath a moon-lit sky. Orion above the lava lake. (Photo: Tom Pfeiffer)
The caldera of Erta Ale with the active lava lake beneath a moon-lit sky. Orion above the lava lake.... [info]
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The lava lake at night with rising Orion above it. (Photo: Tom Pfeiffer)
The lava lake at night with rising Orion above it. (Photo: Tom Pfeiffer) [info]
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The western part of the lava lake is being overturned. The solid crust is broken into large fragments that sink back into the fluid interior of the lake. (Photo: Tom Pfeiffer)
The western part of the lava lake is being overturned. The solid crust is broken into large fragment... [info]
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The crust is breaking apart at the southern margin of the lava lake and fragments are subducted and replaced by fresh hot lava. (Photo: Tom Pfeiffer)
The crust is breaking apart at the southern margin of the lava lake and fragments are subducted and ... [info]
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A second later, the gaps between plates have widened and new crust is forming on the cooling lava that has replaced the subducted slab. (Photo: Tom Pfeiffer)
A second later, the gaps between plates have widened and new crust is forming on the cooling lava th... [info]
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The south crater with the lava lake seen from the SE (Photo: Tom Pfeiffer)
The south crater with the lava lake seen from the SE (Photo: Tom Pfeiffer) [info]
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The north crater with active hornitos which from time to time produce small pahoehoe flows, indicating that the lava level is just beneath the surface. (Photo: Tom Pfeiffer)
The north crater with active hornitos which from time to time produce small pahoehoe flows, indicati... [info]
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Glow from the active hornitos in the north crater at night. (Photo: Tom Pfeiffer)
Glow from the active hornitos in the north crater at night. (Photo: Tom Pfeiffer) [info]
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Glowing hornitos in the north crater. (Photo: Tom Pfeiffer)
Glowing hornitos in the north crater. (Photo: Tom Pfeiffer) [info]
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Glow from the south (l) and the north (r) crater. (Photo: Tom Pfeiffer)
Glow from the south (l) and the north (r) crater. (Photo: Tom Pfeiffer) [info]
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View towards the south crater across a small collapse pit in moonlight. (Photo: Tom Pfeiffer)
View towards the south crater across a small collapse pit in moonlight. (Photo: Tom Pfeiffer) [info]
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The lava lake of Erta Ale volcano, Ethiopia, at dusk (Photo: Tom Pfeiffer)
The lava lake of Erta Ale volcano, Ethiopia, at dusk (Photo: Tom Pfeiffer) [info]
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