# Sun Watch

> Live space weather dashboard: solar X-ray flux, the Kp index, solar wind, NOAA alerts, solar events and SDO imagery.

Canonical: https://spacesphere.sygnito.com/en/sun

Live space weather from NOAA, NASA and Helioviewer

## What this page shows

- **Solar imagery**: Latest full disk views of the Sun from NASA SDO in several wavelengths.
- **NOAA scales**: NOAA's official severity scales for space weather, like the categories used for hurricanes.
- **X-ray flux**: Solar flare strength on the GOES scale, where A is weakest and X is strongest.
- **Solar wind**: Plasma streaming from the Sun; a southward Bz (negative) matters most for storms.
- **NOAA alerts**: Official space weather alerts, warnings and watches, newest first.
- **Kp index**: Geomagnetic activity from 0 to 9; higher values push auroras farther from the poles.
- **Aurora forecast**: The brighter an area, the better the chance of seeing an aurora there around the forecast time. NOAA OVATION model forecast.
- **Solar events**: Recent flares (FLR), coronal mass ejections (CME) and geomagnetic storms (GST).
- **Coronagraph**: A dark disk blocks the Sun's bright face so the faint outer corona and the eruptions flowing off it become visible. GOES-19 CCOR-1 coronagraph. NOAA experimental product.

### NOAA scales

- **Radio blackouts**: Affects high-frequency radio communication on the sunlit side of Earth.
- **Solar radiation storms**: Radiation that can affect satellites and high-altitude flights.
- **Geomagnetic storms**: Drives auroras and can affect power grids and navigation.

### Solar imagery

- Shows the chromosphere and the tall prominences at the Sun's edge.
- Shows the quiet corona and its arching magnetic loops.
- Shows the hotter corona and its active regions.
- Shows the hotter active corona; coronal holes appear as dark areas, the sources of fast solar wind.
- Shows the hottest plasma of solar flares.
- Maps the magnetic field on the Sun's surface.

## Data and updates

The values on this page are loaded live in the browser and change by the minute, so this markdown version describes what the page shows and lists none of them.

The aurora view is a model forecast (NOAA OVATION), not an observation, and the coronagraph is a NOAA experimental product.

## Sources

- NOAA Space Weather Prediction Center
- NASA DONKI
- Helioviewer (SDO, AIA, HMI)

## Related

- [International Space Station](https://spacesphere.sygnito.com/en/iss)
- [Solar System](https://spacesphere.sygnito.com/en/solar)