The Current Planetary K Index
0-3 = Quiet No Geomagnetic Storm.
5 = G1 Geomagnetic Storm.
6 = G2 Geomagnetic Storm.
7 = G3 Major Geomagnetic Storm.
8 = G4 Major Geomagnetic Storm.
9 = G5 Severe Geomagnetic Storm.

The Current A Index Forecast
0-15 = Quiet No Aurora.
15+ = Weak Aurora.
30+ = 144MHz Weak Aurora.
50+ = 144MHz Moderate High Lat Aurora.
70+ = 144MHz Strong High Lat Aurora.
100+ = 144MHz Strong High-Mid Lat Aurora.
VHF (28/50/70/144Mhz) Radio Communication made by Radio Amatuers by reflecting signals off the Aurora.