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

☀ Helios Solar Watch · 2026-08-19 16:00 UTC
QUIET

Current solar conditions are unsettled with a planetary K-index of 2.7 and moderate flare potential from active regions. While geomagnetic activity is currently quiet, there is a sustained 55% probability for M-class flares over the next 24 hours.

HMI Continuum Intensity

Visible light · 3 active regions

SUVI 304 — Extreme UV

Extreme UV · 304 Å

Kp Index
2.7
5 or above = storm

Geomagnetic
G0
24 h max: G0

X-Ray
A/B
quiet


⚠ Kp 5 (G1) reached · 4 more below
Next 24 h

Geomagnetic activity is expected to remain in the unsettled range, with the Kp index likely peaking near 4.0 by early August 20th.

more

Solar flare activity will likely continue to produce occasional C-class events, with a moderate 55% chance of an M-class flare occurring.

🌌 Aurora

Aurora visibility is not expected at mid-latitudes for the next 24 hours.

more

Observers at high latitudes may see minor activity, but current solar wind conditions are insufficient to drive displays into lower latitudes.

👁 Watch for

Monitor the magnetic complexity of AR4507 as it rotates toward the solar limb, as any sudden increase in magnetic shear could increase the likelihood of moderate flare output.

▸ Detailed readings

Radio blackout
 R0
(24 h max R0)
Radiation
 S0
(24 h max S0)
F10.7
 111.0
sfu

Region Location Class Flares C/M/X
AR4507 N04W69 Ehi/BGD 5/0/0
AR4508 N08W37 Cso/B 0/0/0
AR4506 N12W86 Dro/B 0/0/0
NOAA messages
2026-08-19 05:45  Kp 5 (G1) reached (ALTK05)
2026-08-18 20:52  Kp 4 expected (WARK04)
2026-08-18 20:43  Kp 5 (G1) expected (WARK05)
2026-08-17 22:46  Kp 20 possible (WATA20)
2026-08-17 21:05  Kp 4 reached (ALTK04)


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