Kp-index Help

NOAA SWPC Planetary K-index

This is the planetary K-index from the NOAA SWPC. This is a preliminary Kp-index that is updated every minute by the NOAA SWPC with an estimate of the measured Kp of the past 3 hours based on eight ground-based magnetometers around the world. This estimated 3-hour planetary Kp-index consists of 10 values and ranges from 0 to 9. It is important to understand that this Kp-index isn't a forecast or an indicator of the current conditions, it always shows the Kp-value that was observed during a certain period.

All times in UTC

GFZ Potsdam Quicklook Kp-index

This is the Quicklook Kp-index from the GFZ German Research Centre for Geosciences. This is a preliminary Kp-index which estimates the Kp-index in 3-hour periods. It is expressed in a scale of thirds and has 28 values.

All times in UTC

GFZ Potsdam Quicklook Geomagnetic ap-index

The ap index is a 3-hourly "equivalent amplitude" index expressing the range of disturbance in the horizontal components and is directly related to the Kp index. Each day the Ap index will be determined by averaging the eight values of ap for each day. The A-index was invented because there was a need to derive some kind of daily average level for geomagnetic activity. Because of the non-linear relationship of the K-scale to magnetometer fluctuations, it is not meaningful to take averages of a set of K indices

All times in UTC

Latest news

Support SpaceWeatherLive.com!

A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!

63%
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2024/05/15X2.9
Last M-flare2024/05/22M1.2
Last geomagnetic storm2024/05/17Kp6 (G2)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
April 2024136.5 +31.6
May 2024155.4 +18.9
Last 30 days154.1 +23.7

This day in history*

Solar flares
12013M7.24
22024M2.2
32023M1.9
42024M1.5
52021M1.4
ApG
1198351G2
2199250G2
3194649G2
4194031G2
5197936G1
*since 1994

Social networks