Kp index today, October 22, 2026
Planetary geomagnetic activity index in real time. Current value, 24-hour history and 3-day NOAA SWPC forecast.
Planetary Kp index
Geomagnetic activity level on a 0-9 scale. Updated regularly.
DetailsCurrent state
Elevated activity; sensitive people may notice mild discomfort.
Kp index for the last 6 h
3-day Kp index forecast (3-hour intervals)
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Kp index scale (0-9)
Minimal geomagnetic activity.
Small magnetic field variations.
Elevated activity; sensitive people may notice mild discomfort.
Minor geomagnetic storm.
Moderate storm with stronger potential effects.
Strong geomagnetic storm.
Severe storm with significant space weather impact.
Extreme geomagnetic storm.
What is the Kp index and why does it matter?
The Kp index is a global measure of Earth's geomagnetic activity on a scale from 0 to 9. Values from 0 to 3 are generally calm, Kp 4 is unsettled, and Kp 5 or higher indicates a geomagnetic storm on the NOAA G scale.
The Kp index helps estimate the strength of space weather effects. Higher Kp values can affect satellite navigation and radio communication, and some weather-sensitive people may feel fatigue, headache or sleep disruption.
FAQ
What is the Kp index?▾
The Kp index is a planetary measure of geomagnetic activity from 0 to 9.
When does a magnetic storm begin?▾
A geomagnetic storm usually begins at Kp 5, which corresponds to NOAA G1.
How often is the forecast updated?▾
Forecasts are updated regularly by NOAA and may change throughout the day.
Can Kp affect wellbeing?▾
Some sensitive people report fatigue, headaches or poorer sleep during higher geomagnetic activity.
Where can I see the forecast?▾
This page shows the current value, recent chart and 3-day Kp forecast.