Visual Northern/Southern Lights and VHF Radio Aurora Indicators

4.0 KP-INDEX
Minor G1 Geomagnetic Storm
KP-PLANETARY INDEX
Weak High Latitude Aurora
Viewing Possible
20 A-INDEX
Minor G1 Geomagnetic Radio Aurora
RADIO AURORA A-INDEX
High Latitude Radio Aurora
50-144MHZ Possible
KP-INDEX figure provides a good indicator of viewing the Aurora Borealis or Northern Lights The greater the KP-Index the higher probability of viewing .The Estimated 3-hour Planetary Kp-index data is collected from ground-based magnetometers.
A-INDEX is an indicator of possible enhanced VHF radio signal communication at a range of upto 1000 miles or more. During strong solar activity frequencies from 28 to 433MHZ or higher allowing radio communications to be possible at mid to high latitudes .
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