Live Kp index, solar flares, and viewing forecast — recorded continuously from NOAA SWPC
Space Weather Message Code: ALTEF3 Serial Number: 3677 Issue Time: 2026 Apr 16 1323 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3676 Begin Time: 2026 Apr 03 0920 UTC Yesterday Maximum 2MeV Flux: 3248 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Space Weather Message Code: WATA30 Serial Number: 271 Issue Time: 2026 Apr 15 2143 UTC WATCH: Geomagnetic Storm Category G2 Predicted Highest Storm Level Predicted by Day: Apr 16: None (Below G1) Apr 17: G2 (Moderate) Apr 18: G2 (Moderate) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Space Weather Message Code: ALTEF3 Serial Number: 3676 Issue Time: 2026 Apr 15 0756 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3675 Begin Time: 2026 Apr 03 0920 UTC Yesterday Maximum 2MeV Flux: 1705 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Space Weather Message Code: ALTEF3 Serial Number: 3675 Issue Time: 2026 Apr 14 1137 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3674 Begin Time: 2026 Apr 03 0920 UTC Yesterday Maximum 2MeV Flux: 1650 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Space Weather Message Code: ALTEF3 Serial Number: 3674 Issue Time: 2026 Apr 13 1101 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3673 Begin Time: 2026 Apr 03 0920 UTC Yesterday Maximum 2MeV Flux: 1610 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
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