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Posts tagged Mount Veniaminof

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.

Mount Aniakchak and Mount Veniaminof, Alaska – February 20th, 2009

February 20th, 2009 Category: Image of the day, Volcanoes

Alaska - February 17th, 2009

Alaska - February 17th, 2009

Two snow-covered volcanoes, Mount Aniakchak and Mount Veniaminof, are located in the Aleutian Rangeon on this Alaskan peninsula, USA, between the Bering Sea (left) and the Gulf of Alaska (right).

Mount Aniakchak, visible just north of the image center, is a 3,400 year old volcanic caldera (about 10 kilometres [6 mi] in diameter).

It is an extant volcano – at least ten lava flows have occurred since the formation of the caldera; the most recent was in 1931.

Surprise Lake, within the caldera, is the source of the Aniakchak River, a National Wild River. The area around the volcano is the Aniakchak National Monument and Preserve.

To the southwest, Mount Veniaminof is an active stratovolcano located on the Alaska Peninsula. The Alaska Volcano Observatory currently rates Veniaminof as Aviation Color Code Green and Volcano Alert Level Normal.

In modern times the volcano has had numerous small eruptions (over ten of them since 1930); these are located at a cinder cone in the middle of the caldera.

Veniaminof has one of the highest elevations of Alaskan volcanoes. Partly for this reason, it is covered by a glacier that fills most of its large caldera.

Due to the glacier and the caldera walls, there is the possibility for a major flood from a glacier run at some point in the future.