Visual Northern/Southern Lights and VHF Radio Aurora Indicators

3.0 KP-INDEX
Weak Geomagnetic Storm
KP-PLANETARY INDEX
No Aurora
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.
12 A-INDEX
Weak Geomagnetic Radio Aurora
RADIO AURORA A-INDEX
High Latitude Weak Radio Aurora
50-144MHZ Possible
A-INDEX is an indicator of possible enhanced VHF radio signal communication at a range of 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 .
Data Provided by http://services.swpc.noaa.gov   PHP scripts by weather34.com ©2018