Space Weather Message Code: ALTEF3 Serial Number: 3478 Issue Time: 2025 Jun 05 1152 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3477 Begin Time: 2025 Jun 02 1505 UTC Yesterday Maximum 2MeV Flux: 1020 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

Space Weather Message Code: ALTEF3 Serial Number: 3477 Issue Time: 2025 Jun 04 0500 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3476 Begin Time: 2025 Jun 02 1505 UTC Yesterday Maximum 2MeV Flux: 2400 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

Space Weather Message Code: ALTEF3 Serial Number: 3476 Issue Time: 2025 Jun 03 0607 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3475 Begin Time: 2025 Jun 02 1505 UTC Yesterday Maximum 2MeV Flux: 3370 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

Space Weather Message Code: ALTEF3 Serial Number: 3475 Issue Time: 2025 Jun 02 1513 UTC ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Threshold Reached: 2025 Jun 02 1505 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

Space Weather Message Code: ALTEF3 Serial Number: 3474 Issue Time: 2025 Jun 01 0526 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3473 Begin Time: 2025 May 30 0155 UTC Yesterday Maximum 2MeV Flux: 9162 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

*AMSAT NEWS SERVICE* *ANS-152* In this edition: * Welcome SO-125! AMSAT-EA’s HADES-ICM Joins the OSCAR Fleet * Your Voice, Your Board: Nominate Now for 2025 AMSAT Election * Another Batch of CubeSatSim Kits Available Soon in AMSAT Store * SpaceX Starship Ninth Flight Yields Data, Misses Reentry Goals * Japanese Private Lander Resilience Nears Lunar Touchdown * GridMasterMap Satellite Top 100 Rovers June 2025 Rankings * Changes to AMSAT-NA TLE Distribution for May 30, 2025 * ARISS News * AMSAT Ambassad ...Continue Reading

Space Weather Message Code: WATA99 Serial Number: 10 Issue Time: 2025 May 31 1957 UTC WATCH: Geomagnetic Storm Category G4 or Greater Predicted Highest Storm Level Predicted by Day: Jun 01: G4 (Severe) Jun 02: G4 (Severe) Jun 03: 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 45 degrees Geomagnetic Latitude. Induced ...Continue Reading

Space Weather Message Code: WATA99 Serial Number: 9 Issue Time: 2025 May 31 1504 UTC WATCH: Geomagnetic Storm Category G4 or Greater Predicted Highest Storm Level Predicted by Day: Jun 01: G3 (Strong) Jun 02: G4 (Severe) Jun 03: 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 45 degrees Geomagnetic Latitude. Induced C ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3473 Issue Time: 2025 May 31 0634 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3472 Begin Time: 2025 May 30 0155 UTC Yesterday Maximum 2MeV Flux: 4876 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

Space Weather Message Code: ALTXMF Serial Number: 485 Issue Time: 2025 May 30 2359 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2025 May 30 2359 UTC NOAA Scale: R2 - Moderate NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time in ...Continue Reading