Solar Watch — May 28, 2026 | 18:00 UTC

☀ HELIOS SOLAR WATCH · 2026-05-28 16:00 UTC
Solar activity remains in moderate state with low geomagnetic disturbance
SOLAR: MODERATE
GEO: QUIET

Active Regions
10
X-Ray
A/B (quiet)

Solar activity is currently characterized by moderate levels with no significant geomagnetic storms. While flare probabilities for C-class events are high, the current space weather environment remains stable.

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
2.7
0–9 scale · ≥5 = geomagnetic storm

F10.7 Solar Flux
108.0
sfu · >150 = high activity

The sun is exhibiting moderate activity with 15 active regions identified, though current x-ray output remains at background levels. The F10.7 flux is holding steady at 108 sfu, suggesting a stable solar output. Planetary Kp-index readings are fluctuating near 2.7, which indicates a calm, unsettled geomagnetic environment with no immediate impact on satellite or power grid infrastructure.

Key Metric

The 65% probability of M-class flares is the primary metric to monitor, as this indicates the potential for localized radio degradation on the sunlit side of Earth.

Expect the Kp-index to remain below storm thresholds, with minor variations between Kp 1.6 and 3.6 over the next 24 hours. Radio communication remains stable, though observers should anticipate consistent minor C-class flare activity due to the presence of multiple active regions.

🌌 Aurora Outlook

Aurora visibility is not expected at mid-latitudes (40-60°N) for the next 24 hours. Occasional, faint activity may be confined to high polar latitudes under dark-sky conditions.

Region Location Class Flares C/M/X
AR4455 N15E65 Dao/B 1/0/0
AR4454 S15E48 Hrx/A 0/0/0
AR4453 N11W76 Bxo/B 0/0/0
AR4452 N09W35 Dai/B 0/0/0
AR4449 S10E09 Hax/A 0/0/0
AR4448 S06E14 Cro/B 0/0/0
AR4447 S17W28 Dsi/B 1/0/0
AR4446 S16E16 Fko/BG 0/0/0
AR4444 S21W22 Hsx/A 0/0/0
AR4443 S17W81 Axx/A 0/0/0
2026-05-28 11:45:15.723Space Weather Message Code: WARK04
2026-05-28 05:17:14.347Space Weather Message Code: WARK04
2026-05-27 23:47:33.327Space Weather Message Code: WARK04
2026-05-27 14:45:02.823Space Weather Message Code: SUMPX1
2026-05-27 05:47:17.563Space Weather Message Code: WARK04

Monitor the magnetic complexity of active region AR4446, which shows Beta-Gamma characteristics that could potentially produce higher-magnitude flaring than currently observed.