Category: Uncategorized

  • Solar Watch — July 18, 2026 | 06:00 UTC

    ☀ HELIOS SOLAR WATCH · 2026-07-18 04:00 UTC
    Quiet Solar Conditions Persist with Moderate Radio Flux
    SOLAR: QUIET
    GEO: QUIET

    Active Regions
    2
    X-Ray
    A/B (quiet)

    Solar activity remains at low levels with geomagnetic conditions holding steady at Kp 1.7. The sun is currently quiet, with no significant geomagnetic or radiation storms observed or expected.

    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
    1.7
    0–9 scale · ≥5 = geomagnetic storm

    F10.7 Solar Flux
    136.0
    sfu · >150 = high activity

    The planetary K-index is currently at 1.7, indicating a magnetically quiet environment for Earth. Solar flux remains moderate at 136 sfu, providing stable conditions for satellite operations and radio communications. While two active regions are visible on the disk, solar flare activity is minimal, with only minor C-class output noted in the past 12 hours.

    Key Metric

    The F10.7 flux of 136 sfu is the most important metric, as it indicates a stable ionospheric environment beneficial for HF radio propagation and satellite drag management.

    Geomagnetic activity is expected to stay in the quiet range, with the Kp-index peaking briefly at 2.67 before returning to quieter levels. No significant space weather disturbances are anticipated in the next 24 hours.

    🌌 Aurora Outlook

    Aurora visibility is restricted to high polar latitudes. There is no expectation of mid-latitude aurora displays during this period.

    Region Location Class Flares C/M/X
    AR4491 S11E50 Hrx/A 0/0/0
    AR4489 S07E13 Cso/B 0/0/0
    2026-07-17 18:22:33.660Space Weather Message Code: ALTEF3
    2026-07-15 08:53:19.650Space Weather Message Code: WARK04
    2026-07-15 05:58:03.170Space Weather Message Code: ALTK04
    2026-07-15 05:54:15.747Space Weather Message Code: WARK04
    2026-07-15 01:44:29.693Space Weather Message Code: WARK04

    Monitor active region AR4491 for any sudden morphological changes or flux emergence, as it remains the primary candidate for potential C or M-class flare activity.