Solar Watch — July 16, 2026 | 18:00 UTC

☀ HELIOS SOLAR WATCH · 2026-07-16 16:00 UTC
Quiet Solar Conditions Persist with Moderate Radio Flux Levels
SOLAR: QUIET
GEO: QUIET

Active Regions
4
X-Ray
A/B (quiet)

The Sun remains in a state of stable, quiet activity with no significant geomagnetic disturbances expected. Current conditions are characterized by low flare output and stable planetary magnetic levels.

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
2.0
0–9 scale · ≥5 = geomagnetic storm

F10.7 Solar Flux
138.0
sfu · >150 = high activity

Geomagnetic activity is quiet with the Kp-index holding at 2.0. Solar activity, as measured by the F10.7 flux, remains at a moderate 138 sfu, consistent with the current phase of the solar cycle. There are four primary active regions on the disk, but none currently possess the magnetic complexity required for significant flaring events.

Key Metric

The F10.7 flux of 138 sfu is the primary indicator of ongoing solar activity, suggesting that while the disk is currently calm, the Sun maintains sufficient energy to support potential future flare development.

Conditions are expected to remain stable and quiet through the next 24 hours. The Kp-index is forecast to oscillate slightly between 1.5 and 2.3, keeping the geomagnetic environment well below storm thresholds.

🌌 Aurora Outlook

Aurora visibility is restricted to high-latitude regions near the poles. No significant displays are expected for mid-latitude observers at 40-60°N given the current lack of solar wind driving.

Region Location Class Flares C/M/X
AR4491 S11E63 Axx/A 0/0/0
AR4489 S07E27 Hax/A 0/0/0
AR4490 N15E17 Bxo/B 0/0/0
AR4482 S09W82 Hsx/A 0/0/0
2026-07-15 08:53:19.650Space Weather Message Code: WARK04
2026-07-15 05:58:03.170Space Weather Message Code: ALTK04
2026-07-15 05:54:15.747Space Weather Message Code: WARK04
2026-07-15 01:44:29.693Space Weather Message Code: WARK04
2026-07-14 00:08:27.203Space Weather Message Code: ALTK04

Monitor the development of Active Region 4491 as it rotates further onto the visible disk, as its evolution will determine potential flare activity in the coming days.