Solar Watch — September 19, 2026 | 18:00 UTC

☀ Helios Solar Watch · 2026-09-19 16:00 UTC
QUIET

Current solar conditions are quiet, with a planetary K-index of 1.7 and F10.7 flux at 94 sfu. No significant space weather impacts are expected for Earth-based systems over the next 24 hours.

HMI Continuum Intensity

Visible light · 0 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


⚠ Kp 4 expected · 4 more below
Next 24 h

Geomagnetic activity is expected to remain in the quiet range, with the K-index holding steady between 1.0 and 2.0. No significant solar disturbances are anticipated, and the F10.7 flux will likely persist near current levels.

🌌 Aurora

Aurora visibility is restricted to the highest latitudes and remains unlikely for mid-latitudes (40-60°N).

more

Observers in northern polar regions may see faint, intermittent activity, but there is no forecast for a display at lower latitudes.

👁 Watch for

Monitor the development of the two visible active regions for any sudden increase in magnetic complexity that could raise the probability of M-class flares.

▸ Detailed readings

Radio blackout
 R0
(24 h max R0)
Radiation
 S0
(24 h max S0)
F10.7
 94.0
sfu

NOAA messages
2026-09-16 05:38  Kp 4 expected (WARK04)
2026-09-16 00:34  Kp 4 reached (ALTK04)
2026-09-15 18:56  Kp 5 (G1) expected (WARK05)
2026-09-15 17:37  Kp 20 possible (WATA20)
2026-09-14 11:03  Electron flux F3 reached (ALTEF3)


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