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

☀ HELIOS SOLAR WATCH · 2026-06-28 16:00 UTC
Quiet solar conditions persist with minor geomagnetic fluctuations expected
SOLAR: MODERATE
GEO: QUIET

Active Regions
6
X-Ray
A/B (quiet)

The Sun remains in a stable state with low geomagnetic activity and minimal flaring. While current indices are quiet, a brief period of unsettled conditions is anticipated later today.

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
0.7
0–9 scale · ≥5 = geomagnetic storm

F10.7 Solar Flux
104.0
sfu · >150 = high activity

Solar activity is currently subdued with an F10.7 flux of 104 sfu and only minor C-class flare production. Nine active regions are present on the disk, but none show magnetic complexity high enough to suggest an immediate threat of major energetic events. Planetary Kp levels remain very low at 0.7, indicating a magnetically calm near-Earth environment.

Key Metric

The current Kp-index of 0.7 is the primary indicator of the existing geomagnetic stability, ensuring no disruptions for satellite or power grid operators.

Conditions are expected to remain largely quiet, though the Kp-index may tick upward to 4.33 during the 21:00 UTC window. This is a transient increase and is not expected to reach the threshold for a geomagnetic storm. Activity will likely subside back to lower levels by early tomorrow.

🌌 Aurora Outlook

Aurora visibility is not expected for mid-latitudes. Even with the minor rise in the Kp-index, observers at latitudes between 40-60°N will not see significant displays, as conditions remain well below the required threshold for auroral expansion.

Region Location Class Flares C/M/X
AR4475 S10W36 Dai/BG 1/0/0
AR4476 N07W58 Axx/A 0/0/0
AR4477 S14E01 Bxo/B 0/0/0
AR4478 S06E19 Fkc/BGD 0/0/0
AR4479 N15E01 Dai/B 0/0/0
AR4480 S18W05 Dao/B 0/0/0
2026-06-28 10:41:25.723Space Weather Message Code: WATA20
2026-06-28 05:07:19.223Space Weather Message Code: ALTEF3
2026-06-27 07:13:20.747Space Weather Message Code: ALTEF3
2026-06-26 14:06:14.680Space Weather Message Code: ALTEF3
2026-06-25 23:43:25.917Space Weather Message Code: WARK04

Monitor the magnetic evolution of AR4478, which possesses an Fkc classification, as it represents the most significant region for potential flare development in the coming 24 hours.