1 KP-INDEX 3 ap index
Tyst Nej Geomagnetisk storm
KP-PLANETÄR INDEX
Ingen Aurora
Est. daily 4 A-INDEX
Tyst Nej Geomagnetisk storm
INTE AKTIV
Ingen radio Aurora
The higher the KP-INDEX (0-9) the greater the chance of seeing the Aurora Borealis. The three-hourly K index data is collected from ground-based magnetometers at 13 mid-latitude observatories. The scale is non-linear.
The ap index (0-400) is the equivalent three-hourly range or amplitude on a linear scale.
This A-INDEX estimate is the rolling average of the last eight ap indices: the true Ap index is the same average for the UT day. High Kp, ap & Ap indices (caused by strong solar activity) may indicate enhanced VHF radio communication (28-433 MHz) at a range of 1000 miles or more in mid- to high latitudes: the radio-aurora.