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.