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Space weather

Live from NOAA’s Space Weather Prediction Center and NASA. Hover or drag across any chart to read exact values.

Reading the Sun…

Geomagnetic activity

Planetary K-index: past week and 3-day forecast

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Quiet 0–3Active 4Storm 5–6Strong 7+Faded bars are forecast

Solar wind

Real-time solar wind at L1

Speed

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Density

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Speed, km/s

Magnetic field Bz and Bt, nT (south Bz fuels storms)

Density, protons/cm³

Flares and radiation

GOES X-ray flux, 24 hours

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Long 0.1–0.8 nm (flare class)Short 0.05–0.4 nm

Proton flux ≥10 MeV, 24 hours

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S1 radiation storm begins at 10 pfu, which can cause HF blackouts over the poles.

Imagery

Sun in 304 Å (GOES SUVI)

Sun composite (NASA SDO)

NASA SDO three-color composite of the Sun

Coronagraph (SOHO LASCO C3)

SOHO LASCO C3 coronagraph showing any coronal mass ejections

Solar wind forecast (WSA-ENLIL)

Aurora, northern hemisphere

NOAA aurora forecast, northern hemisphere

Aurora, southern hemisphere

NOAA aurora forecast, southern hemisphere

HF absorption (D-RAP)