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Posts tagged Mount Shasta

Mount Shasta and Trinity and Shasta Lakes, USA – January 3rd, 2011

41.3N 122.3W

January 3rd, 2011 Category: Image of the day, Lakes, Mountains, Volcanoes

USA - December 25th, 2010

Mount Shasta, located at the southern end of the cascades in Siskiyou County, California, rises to an altitude of 14,179 feet (4,322 m) in the upper right corner of this orthorectified image.

It the second highest peak in the Cascades and the fifth highest in California. Mount Shasta also has an estimated volume of 85 cubic miles (350 km3) which makes it the most voluminous stratovolcano in the Cascade Volcanic Arc.

In the full image, two artificial reservoirs can be seen south of the volcano: Lake Shasta (right) and Trinity Lake (left). The former was created by the construction of Shasta Dam across the Sacramento River, while the latter was formed by the Trinity Dam on the Trinity River.

Fire in Southern Oregon’s Umpqua National Forest

42.8N 122.1W

September 21st, 2009 Category: Fires, Volcanoes

Oregon Wildfires, USA - September 20th, 2009

Oregon Wildfires, USA - September 20th, 2009

Close-up of main fire

Close-up of main fire

Two fires blaze in southern Oregon, USA, northwest of the round Crater Lake. The larger of the two wildfires, releasing a plume of smoke to the southwest, is located in the Umpqua National Forest, in the Cascade Mountains. The smaller blaze is situated in the Willamette National Forest, also in the Cascades.

The Umpqua National Forest covers an area of one-million acres (4,000 km²), including stands of hemlock, true fir, Douglas-fir and cedar transition to lower elevation forests of mixed conifers and hardwoods. Timbered valleys of old-growth ponderosa and groves of oak also separate mountain peaks.

The Willamette National Forest, on the other hand, contains 1,675,407 acres (6,780.13 km²), making it one of the largest national forests. The forest’s dominant tree species is the Douglas-fir, although over one dozen other conifer species are common there as well.

Further to the south, across the California border, is the Shasta-Trinity National Forest, where the conical, white-tipped peak of the Mount Shasta  stratovolcano can be seen (bottom right corner).

Fire West of Mount Shasta, California

41.3N 122.3W

August 26th, 2009 Category: Fires, Volcanoes

Northern California, USA - August 25th, 2009

Northern California, USA - August 25th, 2009

A wildfire burning west of Mount Shasta, in northern California, releases a plume of smoke that is blowing in a north-northeasterly direction towards the Oregon border above.

The fire is located in Klamath National Forest, a 1,737,774-acre (2,715.27 sq mi, or 7,032.52 km²) national forest overwhelmingly located in Siskiyou County in northern California, but with a tiny extension (1.5 percent of the forest) into southern Jackson County in Oregon.

The forest contains continuous stands of ponderosa pine, Jeffrey pine, Douglas fir, red fir, white fir and incense cedar. Old growth forest is estimated to cover some 168,000 acres (680 km2) of the forest land.

Mount Shasta and Surrounding Volcanic Peaks, California USA

41.3N 122.3W

July 29th, 2009 Category: Volcanoes

USA - July 16th, 2009

USA - July 16th, 2009

A series of volcanoes are visible in this orthorectified image, the most prominent of which is Mount Shasta, in the top left corner. Mount Shasta is a stratovolcano and the second-highest peak in the Cascade Range, at 14,179 feet (4,322 m).

The mountain consists of four overlapping volcanic cones which have built a complex shape, including the main summit. What remains of the oldest of Shasta’s four cones is exposed at Sargents Ridge on the south side of the mountain. Lava from the Sargents Ridge vent covers the Everitt Hill shield at Shasta’s southern foot.

The newest and highest cone is called the Hotlum Cone, named after the Hotlum glacier on its northern face; its longest lava flow, the 500 feet (150 m) thick Military Pass flow, extends 5.5 miles (8.9 km) down its northwest face.

One prominent cone, Shastina, is a 12,330-foot (3,760 m) high satellite cone. The fourth and final cone is exposed south of Shasta’s current summit and is called Misery Hill.

Mount Shasta, California, USA

41.3N 122.3W

July 1st, 2009 Category: Volcanoes

California, USA - June 30th, 2009

California, USA - June 30th, 2009

This orthorectified ASAR (radar) image shows Mount Shasta, a 14,179-foot (4,322 m) stratovolcano that is the second-highest peak in the Cascade Range and the fifth highest peak in California. It is a member of the Cascade Volcanic Arc and is located in Siskiyou County.

Mount Shasta is not connected to any nearby mountain; as can be seen here, it rises abruptly from miles of level ground which encircle it, standing nearly 10,000 feet (3,000 m) above the surrounding area.

Mount Shasta has an estimated volume of 108 cubic miles (450 km3), making it the most voluminous stratovolcano in the Cascades.

The mountain consists of four overlapping volcanic cones which have built a complex shape, including the main summit and the prominent satellite cone of 12,330-foot (3,760 m) Shastina, which has a visibly conical form. If Shastina were a separate mountain, it would rank as the third-highest peak of the Cascade Range.

Mount Shasta’s surface is relatively free of deep glacial erosion except, paradoxically, for its south side where Sargents Ridge runs parallel to the U-shaped Avalanche Gulch. This is the largest glacial valley on the volcano, although it does not presently have a glacier in it.

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