Guide 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. Guide 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 .
Radio Ham Guide Aurora communications can be used by Ham Radio VHF enthusiasts. Using Aurora scatter propagation enables ham radio enthusiasts communications.
Aurora scatter communications using specialised operating techniques allows communications distances up to 2000 km or more at frequencies of 28MHz/50MHz/144MHz/433MHz .