The tephrochronology for statistical examination of the level of volcanic activity evaluation: Volcanic History of Nantai Volcano, central Japan.

Abstract

The level of volcanic activity evaluation can be done based on the statistical examination to the scale, generation, frequency of the eruption. The frequency of the eruption at Nantai Volcano which is no eruption in recently 7000 yrs was calculated based on the tephrochronology and the level of volcanic activity was evaluated statistically. As the eruptions occur randomly, the test was performed to determine the probability of not eruptions occurring in the 7,000 yrs recently. Therefore, the volcanic activity of the Nantai Volcano is a volcanic activities dormant period for 7000 yrs recently.