By. Jennifer Hunter, Grace Kang, Katerina Fupsova

Classification Category  Geological

Natural Hazard Event / Date and Place  Volcano Eruption  Kyushu, Japan – 1991

Consequences and Aftermath of Hazard  damaged about 1,300 houses - Between August 1992 and July 1993,  Pyroclastic flows created an enormous apron of loose fragmental deposits on the volcano's steep east side. Unzen's upper slopes owing to the death of vegetation, these deposits are a ready source of loose debris for generating lahars during rainstorms. Each period of heavy rain required sudden evacuation of several thousand residents.

Other potential natural hazards faced by this Place / Region and Country  earthquake

Total Population at time of event and Total Deaths / Injured from event  44 people killed including three volcanologists: Katia and Maurice Kraft and Harry Glicken.  Destroyed a about 2000 houses from this volcano.

6 Factors 1)Frequency : two hundred years 2)Duration: )Extent : Kyushu about 40 kilometers east of Nagasaki. The most extensive of flows reached a point 4.5 kilometers from the dome. 4)Speed of onset : It became stronger between February 12,1991 and May 20,1991. At the beginning several month of small explosions. 5)Spatial dispersion : yes, remains of eruption still threaten Kyushu 6)Temporal spacing : Random

Pictures

references  an/description_unzen.html an/description_unzen.html  unzen.htm