Sun Watch
Live space weather from NOAA, NASA and Helioviewer
An AI-generated summary of the live NOAA and NASA values shown on this page.
Solar imagery
Latest full disk views of the Sun from NASA SDO in several wavelengths.
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NOAA scales
NOAA's official severity scales for space weather, like the categories used for hurricanes.
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X-ray flux
Solar flare strength on the GOES scale, where A is weakest and X is strongest.
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Solar wind
Plasma streaming from the Sun; a southward Bz (negative) matters most for storms.
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NOAA alerts
Official space weather alerts, warnings and watches, newest first.
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Kp index
Geomagnetic activity from 0 to 9; higher values push auroras farther from the poles.
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Aurora forecast
The brighter an area, the better the chance of seeing an aurora there around the forecast time.
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Solar events
Recent flares (FLR), coronal mass ejections (CME) and geomagnetic storms (GST).
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Coronagraph
A dark disk blocks the Sun's bright face so the faint outer corona and the eruptions flowing off it become visible.
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Sources: NOAA Space Weather Prediction Center, NASA DONKI, Helioviewer (SDO, AIA, HMI).