Author: sitemill

  • Solar Watch — June 18, 2026 | 18:00 UTC

    ☀ HELIOS SOLAR WATCH · 2026-06-18 16:00 UTC
    Solar activity remains stable with quiet geomagnetic conditions
    SOLAR: MODERATE
    GEO: QUIET

    Active Regions
    3
    X-Ray
    A/B (quiet)

    Solar activity is currently low and stable with no significant geomagnetic disturbance. The Sun remains in a quiet state, characterized by minimal flare production and low planetary K-index values.

    HMI Continuum Intensity

    HMI Continuum · Visible Light

    SUVI 304 — Extreme UV

    SUVI 304Å · Extreme Ultraviolet

    R0
    Radio Blackouts
    24h max: R0

    S0
    Solar Radiation
    24h max: S0

    G0
    Geomagnetic Storm
    24h max: G0

    Planetary Kp-Index
    1.0
    0–9 scale · ≥5 = geomagnetic storm

    F10.7 Solar Flux
    118.0
    sfu · >150 = high activity

    The solar environment is currently quiet, with F10.7 flux holding steady at 118 sfu. We are observing five active regions on the disk, primarily contributing minor C-class flare activity, but no significant energetic particle events or solar radiation storms are present. The magnetosphere is undisturbed, with the Kp-index currently sitting at 1.0.

    Key Metric

    The current Kp-index of 1.0 confirms a stable magnetosphere with no immediate risk to satellite operations or power grids.

    Expect geomagnetic conditions to remain quiet, with a slight increase in activity late in the forecast window as the Kp-index may reach 3.0. Solar flare potential remains limited, with only a 20% chance for M-class events within the next 24 hours.

    🌌 Aurora Outlook

    Aurora activity is expected to be minimal. Visibility for mid-latitudes (40-60°N) is unlikely at this time, as current geomagnetic indices remain well below the threshold for significant auroral displays.

    Region Location Class Flares C/M/X
    AR4471 N18E11 Dso/B 0/0/0
    AR4470 N07E40 Dao/B 2/0/0
    AR4465 N07W62 Cso/B 0/0/0
    2026-06-18 15:07:21.583Space Weather Message Code: ALTEF3
    2026-06-16 11:24:14.140Space Weather Message Code: ALTEF3
    2026-06-15 12:35:56.833Space Weather Message Code: ALTEF3
    2026-06-14 13:28:09.427Space Weather Message Code: ALTEF3
    2026-06-14 08:30:13.163Space Weather Message Code: WATA30

    Monitor the development of Active Region 4470, which currently shows the most complex magnetic configuration and potential for C-class flare activity.