Mount Ontake Flashcards
when was the eruption
27th September 2014
Ontake sits between the border of which two plates
Eurasian and North American
what sub plates does Ontake sit between
Amurian and Okhotsk
how many eruptions has Japan experienced in the last 2000 years
1200
What is widespread in Japan
subduction
where is Ontake located
200km west of Tokyo on Honshu
up to what date was Ontake dormant to
october 1979
when were the phreatic eruptions
1991 and 2007
why were so many people on Ontake
it is a tourist destination popular with hikers and climbers
what time did it erupt
midday
was Ontake under any alerts or warnings when it erupted
no
why was the eruption not detected in advance
monitoring detects seismic activity, ground bulging, or magma. but this was a phreatic eruption
what caused the eruption
water superheated by magma
what were the main hazards
ash, pyroclastic flow, volcanic bombs, lahars
how many died
63
