NOAA / Space Weather Prediction Center

Solar Energetic Particles

Three-day Proton Forecast
Product Description:
Daily probabilities of solar proton events over the next one, two, and three days. A solar proton event is defined by the >10 MeV proton flux exceeding 10 particles/(cm2 s sr) at geostationary orbit.

Target Users: Product users include industries that rely on HF Communication, particularly at high latitudes, the satellite industry and activities sensitive to energetic particle radiation at high altitudes and in space.

Three-day Proton Event Forecast
Cadence: Daily
Data Source: Solar Images, GOES X-Ray and Proton measurements

Current Proton Alerts
Product Description:
Timeline of currently active and recent energetic proton alerts. Alerts are issued when observed proton flux levels at geostationary orbit exceed predetermined thresholds.

Target Users: Product users include industries that rely on HF Communication, the satellite industry and activities sensitive to energetic particle radiation at high altitudes and in space.

Current Proton Alerts
Cadence: As Issued
Data Source: GOES Proton measurements