Table 5: Rating of protective capacity based on GPI [16].
|
Geophysically based protection index (GPI) (Ω-1) |
Protective capacity rating |
|
> 2.0 |
Strong |
|
1.1-2.0 |
Moderate |
|
0.1-1.0 |
Fair |
|
< 0.1 |
Weak |