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Posts tagged Crater Lake

Crater Lake in Mount Mazama Caldera, USA

42.9N 122W

January 18th, 2011 Category: Lakes, Volcanoes

USA - December 25th, 2010

This orthorectified image focuses on Mount Mazama, a destroyed stratovolcano in the Oregon part of the Cascade Volcanic Arc and the Cascade Range. The volcano’s collapsed caldera holds Crater Lake, and the entire mountain is located within Crater Lake National Park.

Mazama was destroyed by a volcanic eruption that occurred around 5,677 (± 150) BC. The eruption reduced Mazama’s approximate 14000 ft height by around a mile (1600 m). Much of the volcano fell into the volcano’s partially emptied neck and magma chamber. At 8,159 feet (2,487 m), Hillman Peak is now the highest point on the rim.

Metro Manila by Laguna de Bay, and Interesting Features of Lake Taal, Philippines – November 3rd, 2010

13.8N 120.9E

November 3rd, 2010 Category: Image of the day, Lakes

Philippines - July 13th, 2010

Lake Taal

The extensive bright white area in the main orthorectified image is Metro Manila, situated between Manila Bay (left) and Laguna de Bay (right), on the island of Luzon in the Philippines.

Metro Manila, which is composed of sixteen cities including the city of Manila itself, is one of the most populous metropolitan areas in the world, with a population of 20 million people.

Laguna de Bay is the largest lake in the Philippines and the third largest freshwater lake in Southeast Asia. It has a stylized ‘W’ shape created by two peninsulas jutting out from the northern shore. Between these peninsulas, the middle lobe fills a large volcanic caldera. Laguna de Bay drains to Manila Bay via the Pasig River.

The detail image, on the other hand, focuses on Lake Taal, also visible to the south of Laguna de Bay in the full version of the main image. In the middle of the lake is Vulcano Island, which in turn is home to a smaller caldera lake known fittingly as Crater Lake.

Interestingly, Crater Lake holds the world record for being the largest lake on an island in a lake on an island. Within Crater Lake is another island, called Vulcan Point, which holds the record for being the largest island in a lake on an island in a lake on an island.

Fire Near Coquille Myrtle Grove State Natural Site, Oregon USA

42.9N 124.1W

July 9th, 2010 Category: Fires, Lakes, Mountains, Volcanoes

USA - June 26th, 2010

USA - June 26th, 2010

A white plume of smoke from a fire in Oregon, USA, near the center of the coastline, blows in a southwestwardly direction. The fire is burning in or near the Coquille Myrtle Grove State Natural Site, a state park administered by the Oregon State Parks and Recreation Department.

Moving to the right, several lakes are visible in the Cascade Mountains, including the round caldera of Crater Lake, due east of the fire. The lake rests in the remains of a destroyed volcano (Mount Mazama) and is 1,949 feet (594 m) deep at its deepest point, making it the deepest lake in the United States.

Wildfire North of Lake Huron in Ontario, Canada

46.5N 81W

November 15th, 2009 Category: Fires, Lakes

Canada - November 8th, 2009

Canada - November 8th, 2009

Smoke trails east-northeast from a wildfire burning northwest of the Canadian city of Greater Sudbury, in the province of Ontario, in the upper left quadrant of this image.

Several bodies of water can be seen nearby, the closest of which is Lake Wanapitei, which occupies a meteorite crater near Greater Sudbury. The crater is 5.2 miles (8.37 km) in diameter and the age is estimated to be 37.2 ± 1.2 million years.

East of Lake Wanapitei is the larger Lake Nipissing, with a surface area of 873.3 km2 (337.2 sq mi) and a mean elevation of 196 m (643 ft) above sea level. It is relatively shallow for a large lake, with an average depth of only 4.5 m (14.8 ft). The shallowness of the lake makes for many sandbars along the lake’s irregular coastline.

To the south of both lakes is Georgian Bay, is a large bay of Lake Huron (bottom left quadrant). The main body of the bay lies east of the Bruce Peninsula and south of Manitoulin Island, the largest island in a freshwater lake in the world.  The Main Channel separates the Bruce Peninsula from Manitoulin Island and connects Georgian Bay to the rest of Lake Huron.

Lakes Trasimeno and Bolsena, Italy

October 23rd, 2009 Category: Lakes

Italy - September 24th, 2009

Italy - September 24th, 2009

Sediments swirl in the Adriatic Sea off the east coast of Italy. Located near the center of the shoreline visible here is the port city of Ancona. Moving southwest across the Apennines, two lakes are visible: the green Lake Trasimeno and the dark blue Lake Bolsena.

Lake Trasimeno (or Trasimene) is the largest lake on the Italian peninsula south of the River Po, with a surface area of 128 km², slightly less than Lake Como. Trasimeno is surrounded for half of its shores by hills.

The Tiber River flows some thirty kilometers to the east of the lake, but the lake and the river are separated by hills: no major river flows directly into or out of Lake Trasimeno, and the water level fluctuates significantly according to rainfall levels and the seasonal demands from the towns, villages and farms near the shore.

Lake Bolsena, on the other hand, is a crater lake of volcanic origin, which was formed starting 370,000 years ago following the collapse of a caldera of the Vulsini volcanic complex into a deep aquifer. The lake is supplied entirely from the aquifer, rainfall and runoff, with one outlet at the southern end.

The lake has an oval shape typical of crater lakes. The long axis of the ellipse is aligned in a north-south direction. The bottom is roughly conical reaching a maximum depth at a point in the middle. The entire lake is surrounded by hills on the flanks and summits of which are the comuni. Elevations on the north of the lake are the highest, with a maximum of 702 m (2,300 ft).

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