Tectonics 1 Flashcards
1
Q
How many active volcanoes are there around the world?
A
around 500
2
Q
What % of earthquakes are found in the “ring of fire”?
A
70%
3
Q
In what basin do the vast majority of Tsunamis occur, and what % ?
A
Pacific basin, 90%
4
Q
How thick are tectonic plates and how much do they move per year?
A
100km thick, 2.5cm per year
5
Q
What year was the Sichuan Earthquake in, and what % of deaths were due to a landslide?
A
Sichuan Earthquake 2008, landslide deaths were 30% of total
6
Q
Name 3 primary hazards of volcanoes
A
Ash fall, Lava flow, Pyroclastic flow
7
Q
Name 2 Secondary hazards from volcanoes
A
Lahars ( caused by rainfall )
Jökulhlaups ( caused by glacial melt )
8
Q
When was Boxing day tsunami and how many dead? also magnitude
A
2004, 230k dead, 9.2 m
