Space Weather Message Code: ALTXMF Serial Number: 524 Issue Time: 2026 Apr 24 0812 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2026 Apr 24 0812 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

Space Weather Message Code: ALTEF3 Serial Number: 3684 Issue Time: 2026 Apr 24 0505 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3683 Begin Time: 2026 Apr 19 1920 UTC Yesterday Maximum 2MeV Flux: 3446 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: SUMX01 Serial Number: 215 Issue Time: 2026 Apr 24 0131 UTC SUMMARY: X-ray Event exceeded X1 Begin Time: 2026 Apr 24 0051 UTC Maximum Time: 2026 Apr 24 0107 UTC End Time: 2026 Apr 24 0113 UTC X-ray Class: X2.4 Location: N17W71 NOAA Scale: R3 - Strong Comment: Accompanied by a tenflare with a castelli-U signature. No radio observations currently available. NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potenti ...Continue Reading

Space Weather Message Code: ALTXMF Serial Number: 523 Issue Time: 2026 Apr 24 0108 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2026 Apr 24 0105 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

This week there are no additions or deletions to the AMSAT TLE distribution. Keps mailing list -- keps@amsat.org View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/keps@amsat.org To unsubscribe send an email to keps-leave@amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org ...Continue Reading

SB KEPS @ AMSAT $ORB26114.1 2Line Orbital Elements 26114.AMSAT QST de W1STR AMSAT Orbital Elements for Amateur Satellites in TLE Format From Orbital Analysis Office New England Sci-Tech STEM Education Center Natick MA April 24, 2026 To all radio amateurs These element sets describe the orbits of various satellites in use by the amateur radio community. For details see: www.amsat.org/keplerian-elements-formats/ A daily update of element sets is available at: www.amsat.org/tle/daily-bulletin.txt or withou ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3683 Issue Time: 2026 Apr 23 0459 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3682 Begin Time: 2026 Apr 19 1920 UTC Yesterday Maximum 2MeV Flux: 4922 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: 3682 Issue Time: 2026 Apr 22 0503 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3681 Begin Time: 2026 Apr 19 1920 UTC Yesterday Maximum 2MeV Flux: 4987 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: 3681 Issue Time: 2026 Apr 21 1341 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3680 Begin Time: 2026 Apr 19 1920 UTC Yesterday Maximum 2MeV Flux: 1344 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: 3680 Issue Time: 2026 Apr 20 2023 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3679 Begin Time: 2026 Apr 19 1920 UTC Yesterday Maximum 2MeV Flux: 1297 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