SPACE WEATHER AND PROPAGATION - kd7swh.com/propagation ====================================================== Generated 2026-09-24 04:58 UTC - rebuilds about every 3 hours. Live graphics: https://www.spaceweather.gov/ RIGHT NOW --------- Solar flux (SFI) : 121 - good; the higher bands through 10 m should be workable Sunspot number : 142 sunspots (SESC daily number) Geomagnetic (Kp) : Kp 3 (3.00) - unsettled - minor absorption on polar paths Solar wind : solar wind 333 km/s (slow); Bz 0.0 nT - northward, unfavorable for storms (quieting) Latest flare : C1.1 flare - minor, little HF impact ESTIMATED BAND CONDITIONS (rough guide from flux + Kp, not a measurement) ------------------------------------------------------------------------ Key: [#] Good [+] Fair [-] Poor [.] Closed Band Day Night 80 m [-] Poor [#] Good 40 m [+] Fair [#] Good 30 m [#] Good [#] Good 20 m [#] Good [+] Fair 17 m [#] Good [.] Closed 15 m [#] Good [.] Closed 12 m [+] Fair [.] Closed 10 m [+] Fair [.] Closed VHF (not flux-driven): 6m - quiet; F2 openings only at very high flux. 2m - mostly tropo and local. Real-time truth: prop.kc2g.com and pskreporter.info NOAA SCALES (0 = none; NOAA wording) ------------------------------------ R0 radio blackouts | S0 radiation storms | G0 geomagnetic storms GEOMAGNETIC DETAIL ------------------ Kp 3 (3.00) - unsettled - minor absorption on polar paths Kp 0-9: [###......] (3 of 9) NOAA's storm scale: at Kp 7 (G3) aurora has been seen as far south as Oregon and Illinois (~50 deg geomagnetic latitude); at Kp 6 (G2), New York and Idaho. Aurora power now: northern hemispheric power 18 GW. THREE-DAY OUTLOOK (dates UTC; "-" = not forecast that far) ---------------------------------------------------------- Date Highest Kp Blackout Storm Sep 24 5 20% G1 Sep 25 3.67 20% G0 Sep 26 3.67 20% G0 READING THIS PAGE ----------------- Nothing here depends on color; every reading is in words. SFI (solar flux): Sun's 10.7 cm radio output; higher opens the upper HF bands. Band verdicts follow N0NBH (hamqsl.com); NOAA publishes the raw number. Sunspot number: daily sunspot count; rises and falls with the 11-year cycle. Kp: how disturbed Earth's field is, 0 (calm) to 9 (extreme). 5+ is a storm. Solar wind / Bz: particle stream and its field tilt; Bz at -5 nT or lower (southward) drives storms; northward keeps things quiet. Times are UTC. LATEST WWV BULLETIN (issued 2026-09-24 03:05 UTC) ---------------------------------------------------------- :Product: Geophysical Alert Message wwv.txt :Issued: 2026 Sep 24 0305 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # # Geophysical Alert Message # Solar-terrestrial indices for 23 September follow. Solar flux 121 and estimated planetary A-index 4. The estimated planetary K-index at 0300 UTC on 24 September was 3.00. No space weather storms were observed for the past 24 hours. Space weather for the next 24 hours is predicted to be minor. Geomagnetic storms reaching the G1 level are likely. SOURCES AND NOTICE ------------------ Data from NOAA Space Weather Prediction Center. Readings as of: - sfi: 2026-09-23 20:00 UTC - ssn: 2026-09-23 00:00 UTC - kp: 2026-09-24 00:00 UTC - bands: 2026-09-24 00:00 UTC - solar wind: 2026-09-24 04:50 UTC - scales now: 2026-09-24 04:55 UTC - outlook: 2026-09-24 00:00 UTC - flare: 2026-09-24 04:53 UTC - aurora power: 2026-09-23 22:46 UTC (carried forward) - wwv: 2026-09-24 03:05 UTC NOAA data is a U.S. Government work not subject to copyright (17 USC 105); this site's copyright does not extend to it. Solar-flux band interpretations are N0NBH's. Not affiliated with or endorsed by NOAA.