Solar Watch — September 26, 2026 | 18:00 UTC

☀ Helios Solar Watch · 2026-09-26 16:00 UTC
QUIET

Geomagnetic conditions are currently quiet, following a period of minor, transient instability. Solar activity is characterized by a moderate F10.7 flux and limited flare production across the visible disk.

HMI Continuum Intensity

Visible light · 7 active regions

SUVI 304 — Extreme UV

Extreme UV · 304 Å

Kp Index
1.7
5 or above = storm

Geomagnetic
G0
24 h max: G0

X-Ray
A/B
quiet


⚠ Electron flux F3 reached · 4 more below
Next 24 h

Expect geomagnetic conditions to remain in the quiet range, with the Kp index likely fluctuating between 1 and 3 over the next 24 hours.

more

Solar flare activity will likely persist at low levels, with an 85% probability of additional C-class flares.

🌌 Aurora

Aurora visibility is restricted to high-latitude regions near the poles.

more

No significant displays are expected at mid-latitudes (40-60°N) given the current quiet geomagnetic forecast.

👁 Watch for

Monitor active region AR4535 for any sudden changes in magnetic complexity, as it currently holds the most potential for increased flare output in the coming day.

▸ Detailed readings

Radio blackout
 R0
(24 h max R0)
Radiation
 S0
(24 h max S0)
F10.7
 131.0
sfu

Region Location Class Flares C/M/X
AR4533 S13W17 Bxo/B 0/0/0
AR4534 N10W90 Cro/B 2/0/0
AR4537 N07W81 Axx/A 0/0/0
AR4538 N12W82 Axx/A 0/0/0
AR4536 N02W67 Dso/B 0/0/0
AR4542 S19W07 Bxo/B 0/0/0
AR4535 N11W06 Cro/B 0/0/0
NOAA messages
2026-09-26 15:51  Electron flux F3 reached (ALTEF3)
2026-09-25 21:58  Kp 4 reached (ALTK04)
2026-09-25 21:55  Kp 4 expected (WARK04)
2026-09-25 08:35  Kp 5 (G1) expected (WARK05)
2026-09-21 18:32  Kp 20 possible (WATA20)


Helios Observer · Data: NOAA SWPC · updated every 12 h