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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)
Haruna volcano books
Typical eruption style: explosive
Haruna volcano eruptions: around 550 AD, 520 AD, 450 AD
TimeMag. / DepthDistanceLocation
Sat, 27 May
Sat, 27 May 13:11 UTCM 2.5 / 5.1 km5 kmNORTHERN NAGANO PREF
Sat, 27 May 13:07 UTCM 3.2 / 5 km4 kmNORTHERN NAGANO PREF
Sat, 27 May 12:00 UTCM 3.0 / 5.7 km4 kmNORTHERN NAGANO PREF
Sat, 27 May 11:59 UTCM 3.7 / 11.4 km13 kmNW GUNMA PREF
Tue, 16 May
Tue, 16 May 14:48 UTCM 2.8 / 127.8 km1 kmTOCHIGI GUNMA BORDER
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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A barrage of bombs hits the water, some quite far from the shore. (Photo: Iris Karinkanta)
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