Aurora Nowcast

Two hours from the solar wind already measured, three nights from the Sun.

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Next two hours

Solar wind measured 1.5 million km upstream arrives here in 30 to 90 minutes. Beyond that the forecast widens.

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Solar wind driving and activity, last 6 hours and next 2 hours
Where the oval's equatorward edge sits relative to you, with the visibility tiers
NOAA OVATION aurora forecast, northern hemisphere

Table view of the two-hour forecast

Measured Kp

The planetary index as measured, not forecast: GFZ Potsdam's official 3-hour Kp, Hp30 (GFZ's Kp-scaled index for every half hour), and NOAA's running estimate for the block in progress.

3-hour Kp and the half-hourly Hp30, last 3 days

Table view of the 3-hour Kp by day

Next three nights

Kp forecasts from NOAA and GFZ, CME arrivals from NASA's DONKI runs, stream timing from WSA-Enlil.

Forecast Kp, 3-hour bins, with your visibility thresholds
Predicted solar wind speed at Earth: the WSA-Enlil run, and the 27-day recurrence for five days ahead

Substorms

The explosive phase of the auroral cycle, seen live in the Finnish IMAGE magnetometer chain.

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Electrojet index from the chain, last 12 hours: IL (westward current), IU (eastward), onsets and phases
Where the current is now: X deviation by magnetic latitude
When breakups start at your longitude (onset climatology, next 24 h)

Station by station: X deviation from the quiet level, last 6 hours