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4a - Tectonically active countries: volcanoes (Japan (Mount Ontake…
4a - Tectonically active countries: volcanoes
Japan
Mount Ontake
27 September 2014
no alerts or warnings
eruption killed 63 people
most casualties were climbers or people at the bottom of the mountain
more than 200 people made it down the mountain
the japanese prime minister ordered military assist
large areas around the volcano were affected by
-
ash fall, pyroclastic flow, volcanic bombs,lahars
air space in the vicinity was closed for a while as a precaution of the effect of volcanic ash of aircraft engines
-Mount ontake is 200 km west of tokyo.
-It is 3000m high
-It is snow covered
japan is a very tectonically active area as four plate boundaries meet
Indonesia
Mount Merapi
Between
26 october and the 12 november in 2010
Pyroclastic flow spread 4km to the north, 11.5km to the west, 7 km to the east and 15km to the south
overall 367 people were killed
Lava bombs were thrown 4km from the summit in all directions
277
people were
injured
The eruption was during the raining season so lahars were triggered and fed by ash
410,000
people in the vicinity of the volcano became
refugees
Ash fall caused the closure of the yogyakarta airport for over a fortnight
large numbers of livestock and crops were killed and the
ash fall, pyroclastic flows
caused lots of infrastructure to be destroyed
