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Haruna volcano

stratovolcano 1449 m / 4,754 ft
Honshu, Japan, 36.47°N / 138.88°E
Current status: dormant (1 out of 5)
Typical eruption style: explosive
Haruna volcano eruptions: around 550 AD, 520 AD, 450 AD
Last earthquakes nearby:
TimeMag. / DepthDistanceLocation
Sun, 9 Mar
Sun, 9 Mar 17:32 UTCM 0.3 / 7 km7 km群馬県北部 (Northern part of Gunma prefecture)
Sat, 8 Mar
Sat, 8 Mar 07:05 UTCM 2.0 / 132 km20 km群馬県南部 (Southern part of Gunma prefecture)
Sat, 8 Mar 03:57 UTCM 1.3 / 6 km17 km長野県北部 (Northern part of Nagano Prefecture)
Fri, 7 Mar
Fri, 7 Mar 04:41 UTCM 2.9 / 150 km38 km埼玉県北部 (Saitama Pref.)
Thu, 6 Mar
Thu, 6 Mar 03:48 UTCM 3.1 / 138 km28 km群馬県南部 (Southern part of Gunma prefecture)
View all recent quakes
Haruna volcano a stratovolcano located in central Honshu, 110 km NW of Tokyo. The volcano contains a small summit caldera with a symmetrical post-caldera cone (Haruna Fuji) and Lake Haruna in the western side of the caldera.
The most recent eruptions, dated to the 6th century AD, were 2 large explosive eruptions from the Futatsu-dake lava dome in the eastern part of the caldera.

Background:

Haruna-san volcano forms the older part of the volcanic edifice and dates back more than 300,000 years ago. It had large plinian eruptions about 200,000 and 40,000 years ago, that were followed by caldera formation.
Viscous lava flows and lava domes formed afterwards within and around the caldera.


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