Tectonics - EQ1 Flashcards
1
Q
What are the primary hazards resulting from earthquakes?
A
- Ground shaking
- Crustal fracturing
2
Q
What are the secondary hazards resulting from earthquakes?
A
- ## Soil liquefaction
3
Q
Soil liquefaction
A
Occurs in areas where the ground consists of loose sediment (sand, silt or gravel) that is also waterlogged. Intense ground shaking compacts the loose sediment together (KEY TERM), forcing water between the sediment out and upwards
4
Q
What is the result of soil liquefaction?
A
Ground temporarlirly lose normal strength and behave like a liquid
- Causes buildings to sink, tilt and often collapse
