Space weather
Kp history
The latest reported three-hour geomagnetic index intervals, with their original observation times.
GEOMAGNETIC / RECENT HISTORY
Watch the disturbance.
The latest eight reported three-hour Kp intervals. Copper bars mark Kp 5 or higher, the start of NOAA’s geomagnetic storm scale.
NOAA / planetary K-index ↗One index, one part of the picture.
Kp describes planetary geomagnetic disturbance. It is useful context for radio and aurora watching, but it does not predict every band or signal path.