Description | Magnitude | Average Annually |
Great | 8 and higher | 1¹ |
Major | 7=7.9 | 17² |
Strong | 6=6.9 | 1342 |
Moderate | 5=5.9 | 13192 |
Light | 4=4.9 | 13,000(estimated) |
Minor | 3=3.9 | 13,000(estimated) |
Very Minor | 2=2.9 | 1,300,000(estimated) |
1. Based on observations since 1900. 2. Based on observations since 1990. |