|
Kp Index |
Ap Index |
GEOMAGNETIC FIELD CONDITIONS |
HF NOISE |
AURORA |
|
0 |
0 - 2 |
Very Quiet |
S1-S2 |
None |
|
1 |
3 - 5 |
Quiet |
S1-S2 |
Very Low |
|
2 |
6 - 9 |
Quiet |
S1-S2 |
Very Low |
|
3 |
12 - 18 |
Unsettled |
S2-S3 |
Low |
|
4 |
22 - 32 |
Active |
S3-S4 |
Moderate |
|
5 |
39 - 56 |
MINOR Storm |
S4-S6 |
High |
|
6 |
67 - 94 |
MAJOR Storm |
S6-S9 |
Very High |
|
7 |
111 -154 |
SEVERE Storm |
S9+ |
Very High |
|
8 |
179 -236 |
SEVERE Storm |
Blackout |
Extreme |
|
9 |
300 -400 |
EXTREMELY SEVERE |
Blackout |
Extreme |
