Earthquake = a sudden or violent movement within the Earth’s crust followed by a series of aftershocks
○ Happens due to movement of Earth’s plates
○ Found at:
■ Collision boundaries
■ Conservative boundaries
■ Destructive boundaries
● Focus = origin of the earthquake below earth’s surface
○ Earthquakes energy is released in seismic waves
from the focus (spread out)
● Epicentre = point on the Earth’s surface directly above the
focus
○ Seismic waves are most powerful at epicentre
