Latest Helios Report

  • Solar Watch — October 21, 2026 | 06:00 UTC

    ☀ Helios Solar Watch · 2026-10-21 04:00 UTC
    QUIET

    Geomagnetic activity is currently elevated with a Kp-index of 3.7, trending toward minor G1-level disturbance in the next few hours. While solar flare activity remains low, the increasing planetary K-index indicates a period of unsettled space weather.

    HMI Continuum Intensity

    Visible light · 3 active regions

    SUVI 304 — Extreme UV

    Extreme UV · 304 Å

    Kp Index
    3.7
    5 or above = storm

    Geomagnetic
    G0
    24 h max: G1

    X-Ray
    A/B
    quiet


    ⚠ Kp 4 expected · 4 more below
    Next 24 h

    Geomagnetic conditions are expected to peak at G1 (minor) storm levels around 06:00 UTC before subsiding to quiet levels by the afternoon.

    more

    Flare activity remains largely limited to minor C-class events, with a low probability of significant M-class eruptions.

    🌌 Aurora

    At a Kp of 4 to 5, aurora displays may be possible for high-latitude observers in northern regions of Canada and Scandinavia.

    more

    Mid-latitude observers are unlikely to see significant activity, but should keep an eye on the horizon during the 06:00 UTC peak if skies are dark and clear.

    👁 Watch for

    Monitor the geomagnetic index for any sustained rise beyond Kp 5, which would indicate a confirmed G1-level minor storm requiring minor corrections for satellite operations.

    ▸ Detailed readings

    Radio blackout
     R0
    (24 h max R0)
    Radiation
     S0
    (24 h max S0)
    F10.7
     115.0
    sfu

    Region Location Class Flares C/M/X
    AR4551 S15W71 Eko/BG 1/0/0
    AR4557 N07W41 Dsi/BG 7/0/0
    AR4560 N13W14 Dai/BG 0/0/0
    NOAA messages
    2026-10-21 02:05  Kp 4 expected (WARK04)
    2026-10-20 19:12  Kp 20 possible (WATA20)
    2026-10-19 09:09  SUM10R (SUM10R)
    2026-10-16 19:39  Kp 4 reached (ALTK04)
    2026-10-16 14:19  Electron flux F3 reached (ALTEF3)


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