Lake Toba

Lake Toba

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Lake Toba (Indonesian: Danau Toba) is a lake and supervolcano, 100 km long and 30 km wide, and 505 m. (1,666 ft.) at its deepest point, in the middle of the northern part of the Indonesian island of Sumatra with a surface elevation of about 900 m (3,000 feet), stretching from 2.88, 98.52 to 2.35, 99.1. It is the largest volcanic lake in the world.[1] In addition, it is the site of the 75,000-year-old supervolcanic eruption, the largest in the last 25 million years; where it staged a massive climate-changing event that scientists believe might have wiped out much of humanity. The massive eruption is believed to have a VEI intensity of 8.Contents

Landsat photo

Geology

The Toba caldera complex in Northern Sumatra, Indonesia consists of four overlapping volcanic craters that adjoin the Sumatran "volcanic front". The youngest and fourth caldera is the world’s largest Quarternary caldera (100 by 30 kilometers) and intercepts the three older calderas. An estimate of 2500-3000 cubic kilometers of dense-rock equivalent pyroclastic material, nicknamed the Youngest Toba tuff, was blasted from the youngest caldera during one of the largest single eruptions in geologic history. Following the "Youngest Toba tuff eruption", a typical resurgent dome formed within the new caldera, joining two half-domes separated by a longitudinal graben.[2]

Location: North Sumatra, Indonesia
Coordinates: 2°37′N 98°49′E
Lake type: Volcanic/ tectonic
Primary outflows: Asahan River
Basin countries: Indonesia
Max. length: 100 km
Max. width: 30 km
Surface area: 1,130 km²
Max. depth: 505 m[1]
Water volume: 240 km³
Surface elevation: 905 m
Islands: Samosir

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