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Mount Veniaminof on the Alaska Peninsula, USA

August 3rd, 2009 Category: Volcanoes

Alaska, USA - July 15th, 2009

Alaska, USA - July 15th, 2009

Mount Veniaminof, visible on the right side of this orthorectified image, is an active stratovolcano with a large caldera located on the Alaska Peninsula. This broad, central mountain is 35 km wide at its base; the steep-walled summit caldera is 8×11 km in diameter.

Most of this caldera is filled by an ice field that ranges in elevation from approximately 1750 to 2000 m. Ice also coats the south rim of the caldera and covers 220 square km of the south flank of the volcano. Alpine glaciers descend from the caldera through gaps on the west and north sides of the rim and other alpine glaciers occupy valleys on the north-, east-, and west-facing slopes of the mountain.

In the western part of the caldera, an active intracaldera cone with a small summit crater has an elevation of 2156 m, approximately 330 m above the surrounding ice field. The eruptions that have occurred in modern times have come from this cone, posing a flood threat if such an eruption were to cause the glacier to melt.

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