, slight-, moderate-, great- and very great as detailed below:
Magnitude
-less than 3.0
- 3.2-4.9
-5.0-6.9
-7.0-8.0
- Greater than 8.0
distance of the earthquake, they may also be classified as local shock, near shock, distant shock and shock as detailed below:
Distance in
Less than 4.0
4.0 and 10.0
10.0 and 20.0
Greater than 20.0.
Average number of earthquakes/year
2
7.020
6.0100
5.03,000
4.015,000
3.0>100,000
(M:6.6).
(M:6.3).
(M:6.0).
(M:6.8).
(M:6.9).