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Toba Caldera is one of twenty geoparks in Indonesia, [2] and was recognised in July 2020 as one of the UNESCO Global Geoparks. [3] [4] [5] Lake Toba is the site of a supervolcanic eruption estimated at VEI 8 that occurred 69,000 to 77,000 years ago, [6] [7] [8] representing a climate-changing event.
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Lake Maninjau (Indonesian: Danau Maninjau, meaning "overlook" or "observation" in the Minangkabau language) is a caldera lake in West Sumatra, Indonesia. It is located 36 kilometres (22 mi) to the west of Bukittinggi , at 0°19′S 100°12′E / 0.317°S 100.200°E / -0.317; 100
Toba ash records have not been identified in ice core samples. However, four sulfate events in the ice strata are proposed to represent the deposition of aerosols from the Toba eruption. [ 50 ] [ 32 ] [ 51 ] One sulfate event at 73.75–74.16 kyr, which has all the characteristics of the Toba eruption, is among the largest sulfate loadings that ...
Samosir, or Samosir Island, is a large volcanic island in Lake Toba, located in North Sumatra Province on the island of Sumatra in Indonesia. Administratively, Samosir Island is governed as six of the nine districts within Samosir Regency. The lake and island were formed after the eruption of the Toba supervolcano some 75,000 years ago. [2]
Lake Sidihoni is a lake located within Samosir Island which itself is an island within Lake Toba, in North Sumatra, Indonesia and is therefore notable for being a "lake on an island in a lake on an island".