REPORT	Freatic eruption at Akita yakeyama volcano
	last modified at Oct. 12 , 1997

• Current Eruptions in Japan

　

photo-1		Onigajyo lava dome and new craters.
photo-2		Crater-a is 15m(NS) and 8m(EW) and 30m depth. Type of this crater was fissure and located on the rim of older Onigajyo crater.
photo-3		The pattern of crack indicate soft mud drain back to under ground after the eruption. This depression called crater-b1.
photo-4		The mud flow spreading to center of old Onigajyo crater. This feature of mud flow like a pancake.
photo-5		Blue colored water were exist before the eruption.
photo-6		Mud flow / pile have high water contents then hard to walk on its surface. The length of scale is 2m but 80cm underground.
photo-7		Ring shape soft rim around bomb from crater-a that accidental type.
photo-8		Gray colored ash were distinguished around crater.

Photo-9 before eruption

This photo taken from top of Onigajyo dome view to north. The site of new crater can not see in this photo behind ridge.

photo -10 Air fall ash

This photo taken from SW to NE. Gray colored zone is area of air fall.

photo-11 New craters and mud pile

The explosion crater-a were existed upon ridge of old Onigajyo crater. And another new crater-b were existed bottom of it but sun shade.

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