Takahara

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Takahara volcan

stratovolcan 1795 m / 5,889 ft
Honshu, Japon, 36.9°N / 139.78°E
Condition actuelle: en sommeil (1 sur 5)

Style éruptif tipique: effusive & explosive
Eruptions du volcan Takahara: ca. 6,500 years ago (radiocarbon dated)
Derniers séismes proches:

Time	Mag. / Depth	Distance	Location
Tue, 18 Jun
Tue, 18 Jun 14:47 UTC	M 0.6 / 6 km	16 km	群馬県南部
Tue, 18 Jun 12:11 UTC	M 0 / 5 km	12 km	栃木県北部
Tue, 18 Jun 08:41 UTC	M 0.9 / 9 km	16 km	栃木県北部
Tue, 18 Jun 06:10 UTC	M 0 / 3 km	11 km	栃木県北部
Tue, 18 Jun 05:19 UTC	M 0 / 4 km	11 km	群馬県北部

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Takahara is a small stratovolcano located SW of Nasu volcano and NNW of Utsunomiya city in central Honshu.
The basaltic-to-dacitic volcano is constructed within the Shiobara caldera. It contains a number of small lava domes, including the symmetrical Fuji-san, one of many conical volcanic mountains named after Japan's renowned Mount Fuji.
Fuji-san is the youngest known volcanic feature of Takahara volcano and was formed about 6,500 years ago.

Introduction:

The Shiobara caldera was formed more than 10,000 years ago, and corresponds to the Otawara pumice-flow deposit.
The latest dated eruption of Takahara took place about 6500 years ago along the NW-SE-trending Yumoto-Shiobara fissure system within the caldera. Eruptions along this fissure initially produced the phreatic Takahara-Uenohara tephra deposit distributed primarily to the east. The eruption ended with the construction of Fuji-san lava dome.

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