Geological hazards Flashcards
1
Q
Crust/lithosphere/mantle (brittle)
Creation of plates (mid ocean ridges - pushing)
Destruction of plate (subduction zones - pulling down/traction)
A
Convection currents in mantle
2
Q
Convergent plate boundaries (eg himalayas) are result of
A
subduction (eg Indian under Tibetan plate)
3
Q
What defines plate boundaries
A
Seismicity/volcanoes
4
Q
Tectonic hazards
A
EQs and faults displacement
5
Q
Volcanoes caused by
A
Back arch spreading (more buoyant materials go to top)
6
Q
NZ on boundary of
A
Australian and Pacific plate
7
Q
Pacific Ring of Fire consists of
A
EQs and volcanoes
8
Q
Faste plate motion means
A
higher severity
9
Q
1 magnitude difference equals
A
32X fault increase rate
