1. Distribution of earthquakes

3. Spatial distribution of earthquakes
90% of earthquakes are clustered along plate margins
Shallow focus earthquakes tend to cause the most damage and account for 75% of all earthquake energy released
Deep focus earthquakes are more likely to have a very high magnitude

4. Randomness of earthquakes
10% of earthquakes occur away from plate margins (compared to 5% of volcanic activity)
Causes of intraplate earthquakes include:
Reactivation of old fault lines
Isostatic uplift following melting of ice sheets
Mining subsidence
Fracking
Underground explosions
Creation of reservoirs
Hotspots

5. Width of earthquake belt
Type of plate margin
Width of earthquake belt
Depth of focus
Magnitude
Shallow
Intermediate
Deep
CONSERVATIVE
CONSTRUCTIVE
DESTRUCTIVE
COLLISION ZONE
SUBDUCTION ZONE

6. Depth of focus

9. Location of seismic activity

10. Width of earthquake belt
Type of plate margin
Width of earthquake belt
Depth of focus
Magnitude
Shallow
Intermediate
Deep
CONSERVATIVE
CONSTRUCTIVE
DESTRUCTIVE
COLLISION ZONE
SUBDUCTION ZONE

11. Cause of seismic activity
Explanation for seismic activity
Example
Key information about example
Reactivation of old fault line(s)
Malvern, UK 2002
Isostatic uplift
Scotland, UK
Fracking
Blackpool, UK 2011
Creation of reservoir(s)
Vajont Dam, Italy 1963