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News
Sunday, Jun 09, 2019
The previous article is incorrect. The alert level is not at an elevated state. JMA published a "volcanic forecast" because the volcano is now seismically monitored- as several other volcanoes in Japan have become in the last few years as the monitoring operations are expanded. This means that the JMA alert level system can now be applied to this volcano- it has been assigned Level 1- normal. [more]
Saturday, Jun 08, 2019
JMA raised the alert level from normal to 1 (the lowest level on a 5-level scale) on 30 May due to an increased risk for at the crater. No further details were given. [more]
 

Midagahara volcano

stratovolcano 2621 m / 8,599 ft
Honshu, Japan, 36.57°N / 137.59°E
Current status: normal or dormant (1 out of 5) | Reports
Midagahara volcano books
Last update: 9 Jun 2019 (Correction- alert level not raised)
Typical eruption style: phreatic explosions
Midagahara volcano eruptions: 1858 (?), 1839 No recent earthquakes
TimeMag. / DepthDistanceLocation
Midagahara (prev. referred to as Tate-yama) volcano is located in the southeastern area of Toyama Prefecture, Japan. It is surrounded by high peaks of the North Japan Alps and named for the granite-and-gneiss peak of Tate-yama (立山), which lies immediately to the east and forms one of the tallest peaks in the Hida Mountains at 3,015 m (9,892 ft). Tate-yama, along with Mount Fuji and Mount Haku, it is one of Japan's "Three Holy Mountains".

Background:

Midagahara volcano is a dissected andesitic-to-dacitic stratovolcano. It contains a 4 km wide caldera is believed to be the result of erosion rather than collapse. Inside the caldera, repeated eruptions of lava and pyroclastics formed the Midagahara plateau that was later dissected by the Yu-kawa river.
Eruptions in the past 10,000 years have been restricted to small phreatic explosions that formed craters. A minor historical eruption occurred in the 19th century. An earthquake swarm took place in 1990. Hot springs occur in seven locations on the floor of the poorly defined erosional caldera.
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Source: Tate-yama volcano information (Smithsonian / GVP)


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