Official Space Weather Advisory issued by NOAA Space Weather Prediction Center Boulder, Colorado, USA SPACE WEATHER ADVISORY OUTLOOK #25-38 2025 October 19 at 7:59 p.m. MDT (2025 October 20 0159 UTC) **** SPACE WEATHER OUTLOOK **** Summary For October 13-19 G2-Moderate storm levels were observed on 18 Oct. G1-Minor storm levels were observed on 13 and 19 Oct. R1-Minor radio blackouts were observed on 13-19 Oct. Outlook For October 20-26 No significant space weather storms are expeced duri ...Continue Reading

:Product: Solar Region Summary :Issued: 2025 Oct 20 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 293 Issued at 0030Z on 20 Oct 2025 Report compiled from data received at SWO on 19 Oct I. Regions with Sunspots. Locations Valid at 19/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4248 N06W81 262 0380 Dko 10 05 Beta 4252 S13W28 209 0150 Cso 0 ...Continue Reading

:Product: Solar Region Summary :Issued: 2025 Oct 19 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 292 Issued at 0030Z on 19 Oct 2025 Report compiled from data received at SWO on 18 Oct I. Regions with Sunspots. Locations Valid at 18/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4246 N25W93 288 0300 Dki 08 05 Beta 4248 N07W66 261 0380 Dki 1 ...Continue Reading

:Product: Solar Region Summary :Issued: 2025 Oct 18 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 291 Issued at 0030Z on 18 Oct 2025 Report compiled from data received at SWO on 17 Oct I. Regions with Sunspots. Locations Valid at 17/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4246 N24W81 289 0700 Ekc 11 16 Beta-Gamma-Delta 4248 N07W54 262 ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3550 Issue Time: 2025 Oct 17 1122 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3549 Begin Time: 2025 Oct 01 1325 UTC Yesterday Maximum 2MeV Flux: 3769 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: 2025 Oct 17 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 290 Issued at 0030Z on 17 Oct 2025 Report compiled from data received at SWO on 16 Oct I. Regions with Sunspots. Locations Valid at 16/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4246 N24W69 290 0840 Ekc 14 30 Beta-Gamma-Delta 4248 N07W41 262 ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3549 Issue Time: 2025 Oct 16 0930 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3548 Begin Time: 2025 Oct 01 1325 UTC Yesterday Maximum 2MeV Flux: 2847 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: 2025 Oct 16 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 289 Issued at 0030Z on 16 Oct 2025 Report compiled from data received at SWO on 15 Oct I. Regions with Sunspots. Locations Valid at 15/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4246 N22W56 290 0300 Ekc 14 32 Beta-Gamma-Delta 4248 N07W27 261 ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3548 Issue Time: 2025 Oct 15 1041 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3547 Begin Time: 2025 Oct 01 1325 UTC Yesterday Maximum 2MeV Flux: 5134 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: 2025 Oct 15 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 288 Issued at 0030Z on 15 Oct 2025 Report compiled from data received at SWO on 14 Oct I. Regions with Sunspots. Locations Valid at 14/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4246 N22W43 290 0260 Ekc 12 27 Beta-Gamma-Delta 4248 N07W13 260 ...Continue Reading