Category: Uncategorized

  • Solar Watch — September 23, 2026 | 18:00 UTC

    ☀ Helios Solar Watch · 2026-09-23 16:00 UTC
    QUIET

    Solar activity is transitioning from quiet to unsettled as Kp-index levels are forecast to climb into the 4-range over the next 24 hours. While currently stable, the increasing complexity of active regions warrants closer monitoring for potential impulsive activity.

    HMI Continuum Intensity

    Visible light · 9 active regions

    SUVI 304 — Extreme UV

    Extreme UV · 304 Å

    Kp Index
    0.7
    5 or above = storm

    Geomagnetic
    G0
    24 h max: G0

    X-Ray
    A/B
    quiet


    ⚠ Kp 20 possible · 4 more below
    Next 24 h

    Expect a gradual increase in geomagnetic activity, with the planetary K-index likely reaching 4.33 by late today or early tomorrow.

    more

    While no major storming is currently predicted, the transition to unsettled conditions may create minor fluctuations for sensitive high-frequency communication systems.

    🌌 Aurora

    Aurora visibility is currently restricted to high latitudes.

    more

    Given the forecast peak of Kp 4, observers at high-latitude locations (such as northern Canada or Scandinavia) may have a marginal opportunity to view displays, but mid-latitude observers are unlikely to see activity.

    👁 Watch for

    Monitor for any M-class flare activity, as the 55% probability suggests the current active regions possess enough complexity to produce more energetic bursts in the coming hours.

    ▸ Detailed readings

    Radio blackout
     R0
    (24 h max R0)
    Radiation
     S0
    (24 h max S0)
    F10.7
     106.0
    sfu

    Region Location Class Flares C/M/X
    AR4541 S05W69 Cro/B 0/0/0
    AR4535 N12E35 Cro/B 1/0/0
    AR4539 S09E13 Dso/B 0/0/0
    AR4536 N02W26 Dsi/B 0/0/0
    AR4533 S14E23 Hsx/A 0/0/0
    AR4538 N11W36 Dai/B 0/0/0
    AR4537 N07W40 Dai/B 1/0/0
    AR4540 S13W62 Bxo/B 0/0/0
    AR4534 N11W48 Dai/B 0/0/0
    NOAA messages
    2026-09-21 18:32  Kp 20 possible (WATA20)
    2026-09-16 05:38  Kp 4 expected (WARK04)
    2026-09-16 00:34  Kp 4 reached (ALTK04)
    2026-09-15 18:56  Kp 5 (G1) expected (WARK05)
    2026-09-14 11:03  Electron flux F3 reached (ALTEF3)


    Helios Observer · Data: NOAA SWPC · updated every 12 h