Geomagnetic Storms
Kp / G-Scale · Live Alerts
NOAA G-scale classification with the planetary Kp index and active storm alerts.
Kp Index
G-Scale
Peak Kp (3d)
Active Alerts
Kp · Last 7 days
NOAA planetary K-index, 3-hour cadence
Active NOAA alerts
NOAA G-Scale reference
❓ Frequently Asked Questions
What is a geomagnetic storm?▾
A geomagnetic storm is a real, temporary disturbance of Earth's magnetosphere, usually driven by a coronal mass ejection or a fast solar wind stream, measured on NOAA's official G-scale from G1 (Minor) to G5 (Extreme).
When is the absolute best time to observe?▾
The optimal observation window opens during maximum astronomical dark hours, when moon illumination is low and local cloud cover stays under about 20% for a genuinely clear sky.
What observation equipment do I need?▾
Baseline tracking can be done with the naked eye. For fainter, low-contrast targets, a steady tripod-mounted pair of wide-field binoculars or a small telescope makes a real difference.
Is this event visible from my exact location?▾
Search your specific city or coordinates above — visibility depends on your exact latitude and local horizon, not just your general region.