Latest Helios Report

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

    ☀ Helios Solar Watch · 2026-08-21 04:00 UTC
    QUIET

    Solar activity remains at moderate levels with four active regions currently on the visible disk. While geomagnetic conditions are largely quiet, the potential for further M-class flaring persists from AR4513.

    ⚡ Flare activity — last 12 h
    Peak: M @ 16:11 UTC (11h 49min ago) · M @ 16:02 UTC
    HMI Continuum Intensity

    Visible light · 4 active regions

    SUVI 304 — Extreme UV

    Extreme UV · 304 Å

    Kp Index
    3.3
    5 or above = storm

    Geomagnetic
    G0
    24 h max: G0

    X-Ray
    A/B
    quiet


    ⚠ ALTTP2 · 4 more below
    Next 24 h

    Geomagnetic conditions are expected to subside from current unsettled levels to quiet by the 09:00 UTC period.

    more

    While further C-class flares are likely, the 55% probability of additional M-class events suggests that satellite operators should remain attentive to intermittent X-ray flux increases.

    🌌 Aurora

    Aurora visibility is not expected at mid-latitudes (40-60°N) over the next 24 hours.

    more

    The current Kp index is insufficient to push the auroral oval south of its standard high-latitude boundaries.

    👁 Watch for

    Monitor the magnetic complexity of AR4513 as it rotates further across the disk, as its recent flare history suggests a continued potential for mid-level impulsive activity.

    ▸ Detailed readings

    Radio blackout
     R0
    (24 h max R0)
    Radiation
     S0
    (24 h max S0)
    F10.7
     111.0
    sfu

    Region Location Class Flares C/M/X
    AR4514 S10W56 Cro/B 0/0/0
    AR4508 N09W50 Hrx/A 0/0/0
    AR4507 N04W82 Ehi/BG 4/0/0
    AR4513 N04E69 Dac/B 6/3/0
    NOAA messages
    2026-08-20 20:49  ALTTP2 (ALTTP2)
    2026-08-20 12:12  X-ray flare M5 summary (SUMXM5)
    2026-08-20 11:39  X-ray flare MF reached (ALTXMF)
    2026-08-19 17:57  Kp 4 expected (WARK04)
    2026-08-19 05:45  Kp 5 (G1) reached (ALTK05)


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