Space Weather Message Code: ALTEF3 Serial Number: 3577 Issue Time: 2025 Dec 18 1106 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3576 Begin Time: 2025 Dec 17 1405 UTC Yesterday Maximum 2MeV Flux: 1632 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 Dec 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 352 Issued at 0030Z on 18 Dec 2025 Report compiled from data received at SWO on 17 Dec I. Regions with Sunspots. Locations Valid at 17/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4305 S25W75 199 0060 Hsx 01 01 Alpha 4307 S15W74 198 0130 Dao ...Continue Reading

Our last update for 2025 - Happy Holidays!   DECEMBER 17, 2025 Natural Events   Dear Earth Observatory subscribers, As we come to the end of the year, the Earth Observatory team would like to thank all of you for your continued support during 2025 and over the past 26 years. We have seen lots of change, especially over the past month with the move to our new home, and we are looking forward to 2026 and the promise of new stories and ways to ...Continue Reading

Our last update for 2025 - Happy Holidays!   DECEMBER 17, 2025 Natural Events   Dear Earth Observatory subscribers, As we come to the end of the year, the Earth Observatory team would like to thank all of you for your continued support during 2025 and over the past 26 years. We have seen lots of change, especially over the past month with the move to our new home, and we are looking forward to 2026 and the promise of new stories and ways to ...Continue Reading

Our last update for 2025 - Happy Holidays!   DECEMBER 17, 2025 Weekly News   Dear Earth Observatory subscribers, As we come to the end of the year, the Earth Observatory team would like to thank all of you for your continued support during 2025 and over the past 26 years. We have seen lots of change, especially over the past month with the move to our new home, and we are looking forward to 2026 and the promise of new stories and ways to te ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3576 Issue Time: 2025 Dec 17 1506 UTC ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Threshold Reached: 2025 Dec 17 1405 UTC Station: GOES19 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 update the personal information in your account, go to the Product ...Continue Reading

:Product: Solar Region Summary :Issued: 2025 Dec 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 351 Issued at 0030Z on 17 Dec 2025 Report compiled from data received at SWO on 16 Dec I. Regions with Sunspots. Locations Valid at 16/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4305 S25W62 199 0050 Hax 02 01 Alpha 4307 S15W60 197 0110 Dao ...Continue Reading

:Product: Solar Region Summary :Issued: 2025 Dec 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 350 Issued at 0030Z on 16 Dec 2025 Report compiled from data received at SWO on 15 Dec I. Regions with Sunspots. Locations Valid at 15/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4305 S25W49 199 0060 Hsx 02 01 Alpha 4307 S15W48 198 0120 Dao ...Continue Reading

Official Space Weather Advisory issued by NOAA Space Weather Prediction Center Boulder, Colorado, USA SPACE WEATHER ADVISORY OUTLOOK #25-46 2025 December 14 at 10:04 p.m. MST (2025 December 15 0504 UTC) **** SPACE WEATHER OUTLOOK **** Summary For December 8-14 - Periods of G2 (Moderate) storming were observed on 10-11 Dec. - G1 (Minor) storms were observed on 11,12 and 13 Dec. - An R3 (Strong) event was observed on 08 Dec. - R1 (Minor) events were observed on 09-12 Dec. Outlook For Dec ...Continue Reading

:Product: Solar Region Summary :Issued: 2025 Dec 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 349 Issued at 0030Z on 15 Dec 2025 Report compiled from data received at SWO on 14 Dec I. Regions with Sunspots. Locations Valid at 14/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4304 N26W85 248 0060 Dai 07 05 Beta 4305 S25W36 199 0070 Hax 0 ...Continue Reading