Mount Coronet

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Mount Coronet
Mount Coronet seen from West Portland at sunset
Highest point
Elevation5,683 m (18,645 ft)
Prominence5,356 m (17,572 ft)
Native name[Tengan] Error: {{Native name}}: missing language tag (help)  (language?)
LocationRyouko Island, Ryouko, Nagato
Age of rock250,000 years
Mountain typeDormant Stratovolcano
Type of rockMetamorphic, sedimentary, igneous
Volcanic arcGenesis Volcanic Arc
Last eruption1 - 2 January 1915
Easiest routeRock and glacier climb
volcanic cave trail

Mount Coronet is a large dormant stratovolcano in the Genesis Volcanic Arc in Nagato, located on Ryouko Island about 120 kilometres (75 mi) west of Portland. With a summit elevation of 5,683 m (18,645 ft), it is the highest mountain in Nagato and the Genesis Arcipelago, the most topographically prominent mountain in Nagato, and the tallest in the Genesis Volcanic Arc.

Due to its high probability of an eruption in the near future, Mount Coronet is considered one of the most dangerous volcanoes in the world, and it is on the Decade Volcano list. A large amount of glacial ice means that Mount Coronet could produce massive lahars which could threaten Ryouko Island and Western Nagato.


Mount Coronet is named after a coronet, a small crown consisting of ornaments fixed on a metal ring, as the mountain itself is the "crown" of Nagato. The Genesi word Tengan literally means "celestial crown", considering the mountain's connection to Haruhi.