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Volcan Erta Ale: Novembre 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]
(2523 Hits)
Watching the lava lake at night (Photo: Tom Pfeiffer)
Watching the lava lake at night (Photo: Tom Pfeiffer) [info]
(2031 Hits)
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]
(9743 Hits)
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]
(3020 Hits)
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]
(2392 Hits)
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]
(4946 Hits)
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]
(2659 Hits)
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]
(2694 Hits)
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]
(1066 Hits)
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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Le lac de lave au coucher de soleil (Photo: Tom Pfeiffer)
Le lac de lave au coucher de soleil (Photo: Tom Pfeiffer) [info]
(3825 Hits)
A second lava fountain starts near the other one. (Photo: Tom Pfeiffer)
A second lava fountain starts near the other one. (Photo: Tom Pfeiffer) [info]
(999 Hits)
A spherical lava bubble bursts through the surface of the lake. (Photo: Tom Pfeiffer)
A spherical lava bubble bursts through the surface of the lake. (Photo: Tom Pfeiffer) [info]
(1830 Hits)
Lumières de l'éclat au crépuscule et lave (Photo: Tom Pfeiffer)
Lumières de l'éclat au crépuscule et lave (Photo: Tom Pfeiffer) [info]
(2051 Hits)
The volcano on the evening of 28 Nov 2009. The lava lake is in a phase of crust overturn, and red hot lava illuminates the circular crater walls. (Photo: Tom Pfeiffer)
The volcano on the evening of 28 Nov 2009. The lava lake is in a phase of crust overturn, and red ho... [info]
(3862 Hits)
The lava lake with zig-zag patterns on the crust at night (Photo: Tom Pfeiffer)
The lava lake with zig-zag patterns on the crust at night (Photo: Tom Pfeiffer) [info]
(1879 Hits)
Old pahoehoe lava flows crusted over with yellow sulphur deposits on the caldera floor above the north crater. (Photo: Tom Pfeiffer)
Old pahoehoe lava flows crusted over with yellow sulphur deposits on the caldera floor above the nor... [info]
(1439 Hits)
The north crater (Photo: Tom Pfeiffer)
The north crater (Photo: Tom Pfeiffer) [info]
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Close-up of two "eggs" (Photo: Tom Pfeiffer)
Close-up of two "eggs" (Photo: Tom Pfeiffer) [info]
(663 Hits)
Lava sculptures on a hornito near the north crater (Photo: Tom Pfeiffer)
Lava sculptures on a hornito near the north crater (Photo: Tom Pfeiffer) [info]
(1283 Hits)
Welded spatter forming the walls of a steep hornito near the north crater (Photo: Tom Pfeiffer)
Welded spatter forming the walls of a steep hornito near the north crater (Photo: Tom Pfeiffer) [info]
(562 Hits)
Vertical pillars and miniature tubes formed by lava dripping and flowing down from the top of the hornito. (Photo: Tom Pfeiffer)
Vertical pillars and miniature tubes formed by lava dripping and flowing down from the top of the ho... [info]
(1371 Hits)
Silvery surface of the lava lake crust (Photo: Tom Pfeiffer)
Silvery surface of the lava lake crust (Photo: Tom Pfeiffer) [info]
(907 Hits)
Lava fountain (Photo: Tom Pfeiffer)
Lava fountain (Photo: Tom Pfeiffer) [info]
(1467 Hits)
Lava fountain forming an arc (Photo: Tom Pfeiffer)
Lava fountain forming an arc (Photo: Tom Pfeiffer) [info]
(1372 Hits)
Lava fountain near the rim of the lake (Photo: Tom Pfeiffer)
Lava fountain near the rim of the lake (Photo: Tom Pfeiffer) [info]
(594 Hits)
A single fragment of the older crust is still floating in a sea of fresh lava (Photo: Tom Pfeiffer)
A single fragment of the older crust is still floating in a sea of fresh lava (Photo: Tom Pfeiffer) [info]
(639 Hits)
Subduction of a slab of crust back into the interior of the lava lake (Photo: Tom Pfeiffer)
Subduction of a slab of crust back into the interior of the lava lake (Photo: Tom Pfeiffer) [info]
(676 Hits)
A second later, the piece of crust has disappeared into the lake. (Photo: Tom Pfeiffer)
A second later, the piece of crust has disappeared into the lake. (Photo: Tom Pfeiffer) [info]
(503 Hits)
A new lava fountain starts moving towards the north rim. (Photo: Tom Pfeiffer)
A new lava fountain starts moving towards the north rim. (Photo: Tom Pfeiffer) [info]
(1416 Hits)
The fountain leaves a trail of new, thin crust behind in its wake. (Photo: Tom Pfeiffer)
The fountain leaves a trail of new, thin crust behind in its wake. (Photo: Tom Pfeiffer) [info]
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The trail of a fountain moving NW with the interior current of the lake. (Photo: Tom Pfeiffer)
The trail of a fountain moving NW with the interior current of the lake. (Photo: Tom Pfeiffer) [info]
(1990 Hits)
After each fountaining episode, degassing the lake, the volume shriks and the lake drops by about a meter, leaving dangling lava stalactites on the levees along the margins. (Photo: Tom Pfeiffer)
After each fountaining episode, degassing the lake, the volume shriks and the lake drops by about a ... [info]
(497 Hits)
The lava lake in the evening during a phase of crust break-up. (Photo: Tom Pfeiffer)
The lava lake in the evening during a phase of crust break-up. (Photo: Tom Pfeiffer) [info]
(1498 Hits)
Chaotic crust left after a fountain has died out. (Photo: Tom Pfeiffer)
Chaotic crust left after a fountain has died out. (Photo: Tom Pfeiffer) [info]
(1410 Hits)
The level of the lava lake has risen until the rim. The crust is still stable and blocking gasses inside. (Photo: Tom Pfeiffer)
The level of the lava lake has risen until the rim. The crust is still stable and blocking gasses in... [info]
(503 Hits)
Detail of the lava lake crust. (Photo: Tom Pfeiffer)
Detail of the lava lake crust. (Photo: Tom Pfeiffer) [info]
(1385 Hits)
The lake starts to overflow on the western rim, producing small pahoehoe flows. (Photo: Tom Pfeiffer)
The lake starts to overflow on the western rim, producing small pahoehoe flows. (Photo: Tom Pfeiffer... [info]
(442 Hits)
The crust can no longer be supported and starts to break up on the western end of the lake, leading to a rapid succession of spectacular crust subduction events. (Photo: Tom Pfeiffer)
The crust can no longer be supported and starts to break up on the western end of the lake, leading ... [info]
(1584 Hits)
At the same time, pressurized gasses start producing fountains in the middle of the lake. (Photo: Tom Pfeiffer)
At the same time, pressurized gasses start producing fountains in the middle of the lake. (Photo: To... [info]
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A large spherical gas bubble rises suddenly from the S end of the lake. (Photo: Tom Pfeiffer)
A large spherical gas bubble rises suddenly from the S end of the lake. (Photo: Tom Pfeiffer) [info]
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The motion induced by a rising gas bubble breaks up the crust around it. (Photo: Tom Pfeiffer)
The motion induced by a rising gas bubble breaks up the crust around it. (Photo: Tom Pfeiffer) [info]
(760 Hits)
Lava stalactites (Photo: Tom Pfeiffer)
Lava stalactites (Photo: Tom Pfeiffer) [info]
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Moving lava fountain in the evening (Photo: Tom Pfeiffer)
Moving lava fountain in the evening (Photo: Tom Pfeiffer) [info]
(2503 Hits)
Small fountains start to break through the crust at the northern shore. (Photo: Tom Pfeiffer)
Small fountains start to break through the crust at the northern shore. (Photo: Tom Pfeiffer) [info]
(412 Hits)
While the lake starts to overflow on the western and northen rims, the crust starts to crack open. (Photo: Tom Pfeiffer)
While the lake starts to overflow on the western and northen rims, the crust starts to crack open. (... [info]
(2644 Hits)
The pulsating fountsain at the western shore is seen from above.  (Photo: Tom Pfeiffer)
The pulsating fountsain at the western shore is seen from above. (Photo: Tom Pfeiffer) [info]
(1570 Hits)
New crust has formed around the margins of the lava lake. (Photo: Tom Pfeiffer)
New crust has formed around the margins of the lava lake. (Photo: Tom Pfeiffer) [info]
(485 Hits)
Colorful red and yellow oxides stain the ground on the outer crater rim of the caldera in an area with wet fumaroles. (Photo: Tom Pfeiffer)
Colorful red and yellow oxides stain the ground on the outer crater rim of the caldera in an area wi... [info]
(389 Hits)
Nightly view on the north crater in moonlight (Photo: Tom Pfeiffer)
Nightly view on the north crater in moonlight (Photo: Tom Pfeiffer) [info]
(1511 Hits)
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