Japan Meteorological Agency’s advisory body volcanic eruption liaison meeting on the 28th to predict that the eruption is not Mitakesan the eruption, but the groundwater is heated lava eruption after boiling, namely steam eruption.
Nagano and Gifu Prefecture in Japan, at the junction of the 27th Mitakesan eruption. Japan Meteorological Agency’s advisory body volcanic eruption liaison meeting on the 28th to predict that the eruption is not Mitakesan the eruption, but the groundwater is heated lava eruption after boiling, namely steam eruption.
Deep underground magma rises to the surface is called magma eruption eruption, magma and heat transfer in the ground, causing ground water to boil, the pressure increased rapidly eruption occurred called steam eruption.
The volcano experts contacted by analyzes of the ejected material, and did not detect fresh material from the magma, so that this is a steam eruption.
The contact will be noted that there has now been confirmed after Mitakesan eruption debris flow has been rushed to the southwest, 3 km away, a huge slag stone where it ejected from the vents also fell about 1 km away, out from vents The large number of aerosol is extended to about seven thousand meters of altitude. The total eruption about 100 million tons, but small-scale eruption.
Since the eruption of its volcano activity Mitakesan still active, this research institutions that may still erupt in the future, it is necessary to guard against its ejected slag stone, landslides and debris flows occur when rainfall and so on. However, due to the earth’s crust along Mitakesan no big change, experts say the local magma has not increased significantly, so there is no sign of a large-scale eruption.
By the evening of 28, the eruption has led Mitakesan four climbers were killed and more than climbers cardiopulmonary arrest, is still in the rescue.