Official Space Weather Advisory issued by NOAA Space Weather Prediction Center Boulder, Colorado, USA SPACE WEATHER ADVISORY OUTLOOK #26-1 2026 January 4 at 7:31 p.m. MST (2026 January 5 0231 UTC) **** SPACE WEATHER OUTLOOK **** Summary For December 29-January 4 R1 (Minor) radio blackouts were observed on 29 Dec due to activity from Region 4325. R2 (Moderate) radio blackouts were obsered on 02 Jan due to activity from Region 4324. G1 (Minor) geomagnetic storms were observed on 02 Jan due to ...Continue Reading

:Product: Solar Region Summary :Issued: 2026 Jan 05 0030 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Weather Prediction Center and the U.S. Air Force. # Joint USAF/NOAA Solar Region Summary SRS Number 5 Issued at 0030Z on 05 Jan 2026 Report compiled from data received at SWO on 04 Jan I. Regions with Sunspots. Locations Valid at 04/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4323 S15W44 290 0190 Dso 07 03 Beta 4324 N26W40 286 0070 Cso 02 ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3594 Issue Time: 2026 Jan 04 1437 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3593 Begin Time: 2025 Dec 21 1425 UTC Yesterday Maximum 2MeV Flux: 1940 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.Thank you for using the Product Subscription Service. If you would like to remove a product subscription or updat ...Continue Reading

:Product: Solar Region Summary :Issued: 2026 Jan 04 0030 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Weather Prediction Center and the U.S. Air Force. # Joint USAF/NOAA Solar Region Summary SRS Number 4 Issued at 0030Z on 04 Jan 2026 Report compiled from data received at SWO on 03 Jan I. Regions with Sunspots. Locations Valid at 03/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4323 S17W28 288 0140 Dai 07 20 Beta 4324 N24W28 288 0070 Dai 05 ...Continue Reading

:Product: Solar Region Summary :Issued: 2026 Jan 03 0030 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Weather Prediction Center and the U.S. Air Force. # Joint USAF/NOAA Solar Region Summary SRS Number 3 Issued at 0030Z on 03 Jan 2026 Report compiled from data received at SWO on 02 Jan I. Regions with Sunspots. Locations Valid at 02/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4323 S17W14 287 0030 Cro 03 06 Beta 4324 N24W15 288 0170 Dai 04 ...Continue Reading

:Product: Solar Region Summary :Issued: 2026 Jan 02 0030 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Weather Prediction Center and the U.S. Air Force. # Joint USAF/NOAA Solar Region Summary SRS Number 2 Issued at 0030Z on 02 Jan 2026 Report compiled from data received at SWO on 01 Jan I. Regions with Sunspots. Locations Valid at 01/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4317 N11W90 016 0030 Hsx 02 01 Alpha 4323 S17W00 286 0010 Bxo 03 ...Continue Reading

:Product: Solar Region Summary :Issued: 2026 Jan 01 0030 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Weather Prediction Center and the U.S. Air Force. # Joint USAF/NOAA Solar Region Summary SRS Number 1 Issued at 0030Z on 01 Jan 2026 Report compiled from data received at SWO on 31 Dec I. Regions with Sunspots. Locations Valid at 31/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4317 N11W76 015 0160 Cao 06 05 Beta 4323 S17E14 285 0010 Axx 06 ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3591 Issue Time: 2025 Dec 31 1632 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3590 Begin Time: 2025 Dec 21 1425 UTC Yesterday Maximum 2MeV Flux: 5613 pfu Comment: Electrons went over threshold at 31/1255 through 31/1530 UTC. Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.Thank you for using the Product Subscripti ...Continue Reading

:Product: Solar Region Summary :Issued: 2025 Dec 31 0030 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Weather Prediction Center and the U.S. Air Force. # Joint USAF/NOAA Solar Region Summary SRS Number 365 Issued at 0030Z on 31 Dec 2025 Report compiled from data received at SWO on 30 Dec I. Regions with Sunspots. Locations Valid at 30/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4317 N11W62 014 0200 Dso 05 07 Beta-Gamma 4321 S10W90 042 0320 ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3590 Issue Time: 2025 Dec 30 0502 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3589 Begin Time: 2025 Dec 21 1425 UTC Yesterday Maximum 2MeV Flux: 6690 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.Thank you for using the Product Subscription Service. If you would like to remove a product subscription or updat ...Continue Reading