Lava lake in Pu'u O'o crater: July 2007

Lago di lava in Pu'u ' O'o cratere (luglio 2007)

Vi presentiamo alcune foto dal lago di lava che occupa la parte orientale del Pu'u 'O'o cratere del vulcano Kilauea, Hawaii, scattata durante 14-20 luglio 2007.

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The active lava lake at dusk. The crust is so thin, that the red glow breaks through in many places; at the left side, parts of the crust are being overturned. (Photo: Tom Pfeiffer)

The active lava lake at dusk. The crust is so thin, that the red glow breaks through in many places;... [info]
(2327 visti)

Overturning of older crust is a common feature at lava lakes. When the crust cools sufficiently, it contracts and becomes denser than the liquid underneath. Eventually, pieces of it become unstable and overturn to sink back into the lake. New crust is formed by upwelling lava from underneath. hawaii_e6829.jpg (Photo: Tom Pfeiffer)

Overturning of older crust is a common feature at lava lakes. When the crust cools sufficiently, it ... [info]
(1135 visti)

Hot, liquid lava flooding over older crust. (Photo: Tom Pfeiffer) [info]
(1199 visti)

$Liquid lava floods older crust. The weight of the flooding lava causes new fractures and new segments of the crust to overturn (upper left of the photo). (Photo: Tom Pfeiffer)$

Liquid lava floods older crust. The weight of the flooding lava causes new fractures and new segment... [info]
(3852 visti)

Fresh lava from the interior of the lake replaces older crust sinking back into the lake. hawaii_e7039.jpg (Photo: Tom Pfeiffer)

Fresh lava from the interior of the lake replaces older crust sinking back into the lake. hawaii_e70... [info]
(2074 visti)

Fresh lava from the interior of the lake flooding over older crust on the lake. hawaii_e7042.jpg (Photo: Tom Pfeiffer)

Fresh lava from the interior of the lake flooding over older crust on the lake. hawaii_e7042.jpg (Ph... [info]
(2567 visti)

The lava lake and the spattering vent at night. (Photo: Tom Pfeiffer) [info]
(1805 visti)

$The spattering vent feeding the lava lake and zig-zag fractures on the surface. (Photo: Tom Pfeiffer)$

The spattering vent feeding the lava lake and zig-zag fractures on the surface. (Photo: Tom Pfeiffer... [info]
(1033 visti)

The lava lake at dusk and an initial stage of crust overturn in the center. (Photo: Tom Pfeiffer) [info]
(1051 visti)

View onto the largely crusted over lava lake. hawaii_e6817.jpg (Photo: Tom Pfeiffer) [info]
(988 visti)

The lava lake in the evening light. At the far end, an overturn of crust has just taken place. (Photo: Tom Pfeiffer)

The lava lake in the evening light. At the far end, an overturn of crust has just taken place. (Phot... [info]
(1961 visti)

hawaii_e7098.jpg (Photo: Tom Pfeiffer) [info]
(1804 visti)

hawaii_e7099.jpg (Photo: Tom Pfeiffer) [info]
(1884 visti)

$Concentric fractures in the lava lake crust causing a larger overturn of several segments on the lava lake surface. (Photo: Tom Pfeiffer)$

Concentric fractures in the lava lake crust causing a larger overturn of several segments on the lav... [info]
(2115 visti)

hawaii_e7101.jpg (Photo: Tom Pfeiffer) [info]
(979 visti)

Details of the lava lake in Pu'u 'O'o in July 2007 (Photo: Tom Pfeiffer) [info]
(1010 visti)

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Lago di lava in Pu'u ' O'o cratere (luglio 2007)

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