Solar Watch — June 21, 2026 | 18:00 UTC

☀ HELIOS SOLAR WATCH · 2026-06-21 16:00 UTC
Solar activity remains stable with moderate flux and quiet geomagnetic levels
SOLAR: UNSETTLED
GEO: QUIET

Active Regions
3
X-Ray
A/B (quiet)

The Sun is currently in a quiet state with geomagnetic conditions remaining at G0 levels. Solar activity is characterized by steady, moderate radio flux and low-level flare production.

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
1.3
0–9 scale · ≥5 = geomagnetic storm

F10.7 Solar Flux
117.0
sfu · >150 = high activity

Current geomagnetic activity is minimal with a Kp-index of 1.3. Solar activity is being driven by three active regions, with AR4473 acting as the primary source for recent C-class and M-class flare activity. The F10.7 solar radio flux holds steady at 117 sfu, indicating a moderate level of background solar output suitable for standard HF propagation.

Key Metric

The F10.7 flux value of 117 sfu is the most important metric, as it confirms moderate solar background activity which supports stable high-frequency (HF) radio communications.

Geomagnetic conditions are expected to remain quiet over the next 24 hours, with Kp indices hovering between 0.67 and 1.67. No significant solar radiation or geomagnetic storms are anticipated during this period.

🌌 Aurora Outlook

Aurora visibility is not expected for mid-latitudes. Activity will be restricted to high-latitude regions, and even there, displays are likely to be faint or non-existent given the current low geomagnetic disturbance levels.

Region Location Class Flares C/M/X
AR4473 S08E56 Eao/B 2/1/0
AR4472 S14E42 Dao/B 0/0/0
AR4470 N07E02 Cao/B 0/0/0
2026-06-20 04:07:09.847Space Weather Message Code: ALTTP2
2026-06-20 04:06:10.800Space Weather Message Code: ALTTP2
2026-06-20 04:03:56.153Space Weather Message Code: ALTTP2
2026-06-20 04:03:56.120Space Weather Message Code: ALTTP2
2026-06-20 04:03:56.087Space Weather Message Code: ALTTP2

Monitor AR4473 for any further complex magnetic evolution, as it remains the primary region capable of producing additional M-class flares over the next 24 hours.