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News
Visual and thermal images of Niigata Yake-Yama on 6 May (t) compared to 15 April (b) (JMA)
Sunday, May 08, 2016
A very small (presumably phreatic) eruption took place at the volcano during the past days. ... [more]
Seismic unrest (1 and 2) and slight inflation (3) at Niigata Yake-Yama (source: JMA)
Friday, May 06, 2016
An increase in small earthquakes has been detected under the volcano located on the border between Niigata and Nagano Prefecture recently. ... [more]
 

Niigata-Yake-yama volcano

lava dome 2400 m / 7,874 ft
Honshu, Japan, 36.92°N / 138.04°E
Current status: minor activity or eruption warning (3 out of 5)
Niigata-Yake-yama webcams / live data
Niigata-Yake-yama volcano books
Last update: 8 May 2016 (sporadic explosions, seismic unrest)
Typical eruption style: explosive
Niigata-Yake-yama volcano eruptions: 1998, 1997, 1989, 1987, 1983, 1974, 1963, 1962, 1949, 1854, 1852, 1773, 1361, 989, 887 No recent earthquakes
TimeMag. / DepthDistanceLocation
Niigata-Yake-yama volcano is located in the Niigata prefecture in central Honshu, near the Japan Sea. It is one of several Japanese volcanoes named Yake-yama ("Burning Mountain"). It is a very young andesitic-to-dacitic lava dome. A large explosive eruption in 887 AD produced a major pyroclastic flow which traveled 20 km to the sea.

Background:

The small volcano rises to 2400 m and was constructed on a base of Tertiary mountains 2000 m high beginning about 3100 years ago. 3 major magmatic eruptions took place in historical time, producing pyroclastic flows and surges and lava flows that traveled mainly down the Hayakawa river valley to the north and NW.
The first of these eruptions took place about 1000 years ago (in 887 and possibly 989 AD) and produced the Hayakawa pyroclastic flow, which traveled about 20 km to reach the Japan Sea, and the massive Mae-yama lava flow, which traveled about 6.5 km down the Hayakawa river valley. The summit lava dome was emplaced during the 1361 eruption, and the last magmatic eruption took place in 1773 AD. Eruptive activity since 1773 has consisted of relatively minor phreatic explosions from several radial fissures and explosion craters that cut the summit and flanks of the dome.
(Source: Smithsonian Global Volcanism Program)


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