[G04-P04] Characteristics of the mechanism of released volcanic block’s trajectory by explosive eruption and necessity of the“disaster prevention”education – by the data of Habuminato crater in 838AD -.
Keywords:Volcanic disaster , Explosive eruption , Ballistic ejection, Disaster education, Volcanic block
As described above, the mechanism for ballistic discharge of the ejecta like steam eruption, magmaphreatic eruption and the initial starting sudden explosion of other many general volcanos, rock masses of large size (1 m to several meters) are able to attain a few kilometers away beyond the boudary of smaii size rocks distribution area. This fact will invite the unexpected volcanic disasters and weremember the cases of Ontakeyama a few years ago and Kusatsu Shiraneyama recently. For this reason, I think that from the viewpoint of disaster preventing education of volcanic disaster, we must introduce these contents like this in the class and textbooks of Earth science and Physics, especially in our volcanic country,Japan.
(1) Shunichi Sato, "Mechanism of Causing Base Surge, inferred from the Bomb Sag's Structure and its Trajectories", autograph, Kagoshima International Conference on Volcanoes, International Volcanic Congress (Kagoshima), Proceedins, NIRA, pages 79-82
(2) Shunichi Sato, "Initial morphology of black smoke pillars caused by steam explosion, relationship between pre-eruption topography and location of explosion point source near the crater", Journal of Volcanographical Society of Japan volcano, 39 (3 ), Pages. 99-111
(3) Shunichi Sato, "volcanic energy teaching material made from a buried hole by a stone", single author, junior high school education research association · Journal of Japan Science Education Association "SCIENCE IN EDUCATION", Vol. 18, No. 1 , Pages 24-27
(4) Shunichi Sato, "Ballistic trajectory and steam explosion process estimated from Block sag", Journal of Volcanological Society of Japan Volcano Vol. 2, 29, pages 140-147