Tectonic processes & hazards EQ 1 key info

Question 1

a seismic hazard

Answer 1

generated when rocks within 700 km off the earth’s surface come under such stress that they break and become displaced

Question 2

a volcanic hazard

Answer 2

associated with eruption events

Question 3

intra-plate earthquakes

Answer 3

occur in the middle or interior of tectonic plates and are much rarer than boundary earthquakes.

Question 4

Oceanic fracture zone

Answer 4

belt of activity through the oceans along the mid-ocean ridges coming ashore in Africa, the red sea, the dead sea rift and california

Question 5

continental fracture zone

Answer 5

belt of activity following the mountain ranges from spain via the alps, to the middle east the himalayas to the east indies and the circumscribing the pacific

Question 6

Hot spot

Answer 6

an area in the mantle where heat rises a s a hot thermal plume. High heat and low pressure causes the lithosphere to melt and rise through the cracks to the surface to form an active volcano