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Posts tagged Volcanoes

Rough Appearance of Mauna Kea Volcano in Hawaii, USA – May 4th, 2011

19.8N 155.4W

May 4th, 2011 Category: Image of the day, Volcanoes

USA – April 28th, 2011

This orthorectified image shows the slopes of Mauna Kea, a dormant volcano on the island of Hawai`i. Standing 4205 m above sea level, its peak is the highest point in the state of Hawaii.

In its current post-shield state, its lava is more viscous, resulting in a steeper profile. Late volcanism has also given it a much rougher appearance than its neighboring volcanoes; contributing factors include the construction of cinder cones, the decentralization of its rift zones, the glaciation on its peak, and the weathering effects of the prevailing trade winds.

Villarrica and Mocho-Choshuenco Volcanoes, Chile – March 11th, 2011

39.2S 72.2W

March 11th, 2011 Category: Image of the day, Lakes, Mountains, Volcanoes

Chile - February 18th, 2011

This orthorectified image shows volcanoes and lakes by the Andes Mountains in Chile. Visible just below the center of this image is Villarrica, one of Chile’s most active volcanoes.

Villarrica, with its lava of basaltic-andesitic composition, is one of only four volcanoes worldwide known to have an active lava lake within its crater. The volcano usually generates strombolian eruptions, with ejection of incandescent pyroclasts and lava flows.

Further to the south, visible only in the full image, is Mocho-Choshuenco, a glacier-covered compound stratovolcano in the Andes of Los RĂ­os Region, Chile. It is made of the twin volcanoes Choshuenco in the northwest and the Mocho in the southeast.

Mount Konocti on Shores of Clear Lake in California, USA

38.9N 122.7W

January 13th, 2011 Category: Lakes, Mountains, Volcanoes

USA - December 25th, 2010

Clear Lake (bottom right quadrant) is the largest natural freshwater lake entirely in California, and has the largest surface area of any freshwater lake entirely in California, the tenth largest by capacity.

The geology of Clear Lake is chaotic, with numerous small faults being present in the south end of the lake as well as many old volcanoes, the largest being Mount Konocti, sitting at the middle of the lake’s south shore (visible near the bottom edge of this this orthorectified image).

Vegetation Around Mauna Loa Volcano on Hawaii, USA – January 4th, 2011

21.1N 157.2W

January 4th, 2011 Category: Image of the day, Volcanoes

USA - December 26th, 2010

The island of Hawaii occupies virtually all of this thumbnail image, while several other of the Hawaiian Islands can be observed in the full version.

The island shows terrain of mixed colors, mainly shades of green and brown. The green areas indicate forests and vegetation, while the brown areas are volcanic. The dark brown area in the center of the island is the Mauna Loa volcano. The darkest brown areas are mostly lava flows on the volcano’s relatively shallow slopes.

Nevado de Toluca Volcano, Mexico

19.1N 99.7W

August 14th, 2010 Category: Volcanoes

Mexico - July 22nd, 2010

This APM image shows the Nevado de Toluca (center left), a large stratovolcano in central Mexico, located about 80 km west of Mexico City near the city of Toluca. The volcano has a 1.5 km wide summit caldera which is open to the west.

It is generally cited as the fourth highest of Mexico’s peaks, although by some measurements, Sierra Negra is slightly higher. The highest summit, 4680 m Pico del Fraile (Friar’s Peak), is on the south side of the crater and the second highest, 4640 m Pico del Aguila (Eagle’s Peak), is on the north.

There are two crater lakes on the floor of the basin at about 4200 m, the larger Lago del Sol (Sun Lake) and the smaller, but deeper, Lago de la Luna (Moon Lake).

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