Geomagnetic Storms X

Geomagnetic Storms X answers questions about magnetic storms and space weather with live data from NOAA's Space Weather Prediction Center and GFZ Potsdam, by the same rules as the Geomagnetic Storms X apps.

Tools:

• Geomagnetic conditions now: the planetary K index (Kp), the NOAA G-scale storm level, when it was measured and whether it is still current, and the next storm in the forecast.
• 3-day forecast: today, tomorrow and the day after in your own time zone, with each day's peak and every three-hour interval, measured once it has begun.
• 27-day outlook: NOAA's largest expected Kp, Ap and radio flux for each day.
• Kp history: the last 24 hours, 7 days or 30 days, with the maximum. Gaps stay gaps, never zeros.
• Solar flares and X-rays: the X-ray level now, the strongest flare with its radio blackout level, and the flares recorded.
• Moon phase: the day's phase, illumination, and the next full and new moon, useful for aurora watching.

Every answer gives times in UTC and in your time zone, says when a reading is old, and names its sources. A storm begins at Kp 4.67, as NOAA rounds it. Read-only, free, no account and no key. Geophysical data only; no health or medical information.