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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.
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]
(2289 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]
(1110 visti)
Hot, liquid lava flooding over older crust. (Photo: Tom Pfeiffer)
Hot, liquid lava flooding over older crust. (Photo: Tom Pfeiffer) [info]
(1175 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]
(3699 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]
(2267 visti)
The lava lake and the spattering vent at night. (Photo: Tom Pfeiffer)
The lava lake and the spattering vent at night. (Photo: Tom Pfeiffer) [info]
(1778 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]
(1011 visti)
The lava lake at dusk and an initial stage of crust overturn in the center.  (Photo: Tom Pfeiffer)
The lava lake at dusk and an initial stage of crust overturn in the center. (Photo: Tom Pfeiffer) [info]
(1037 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]
(1867 visti)
hawaii_e7098.jpg (Photo: Tom Pfeiffer)
hawaii_e7098.jpg (Photo: Tom Pfeiffer) [info]
(1755 visti)
hawaii_e7099.jpg (Photo: Tom Pfeiffer)
hawaii_e7099.jpg (Photo: Tom Pfeiffer) [info]
(1859 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]
(2067 visti)

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