Solar Watch — August 20, 2026 | 06:00 UTC

☀ Helios Solar Watch · 2026-08-20 04:00 UTC
QUIET

The Sun is currently showing moderate activity levels with a primary focus on AR4513, which produced an M-class flare in the last 12 hours. Geomagnetic conditions remain in the unsettled range with no significant storm activity predicted at this time.

⚡ Flare activity — last 12 h
Peak: M @ 18:51 UTC (9h 9min ago) · M @ 18:50 UTC
HMI Continuum Intensity

Visible light · 4 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 4 expected · 4 more below
Next 24 h

Geomagnetic activity is expected to remain unsettled over the next 24 hours, with Kp levels potentially peaking near 3.67 as minor disturbances pass.

more

Flare probability for M-class events remains elevated at 55%, primarily due to the magnetic complexity of AR4513.

🌌 Aurora

Aurora visibility is not expected at mid-latitudes (40-60°N).

more

Observers in high-latitude regions may see localized activity, but significant displays are unlikely given current planetary Kp levels.

👁 Watch for

Monitor the magnetic evolution of AR4513 as it nears the limb; any sudden changes in its magnetic structure could indicate an increased risk of further M-class or higher impulsive solar flares.

▸ Detailed readings

Radio blackout
 R0
(24 h max R0)
Radiation
 S0
(24 h max S0)
F10.7
 107.0
sfu

Region Location Class Flares C/M/X
AR4513 N03E81 Dao/B 2/1/0
AR4507 N04W69 Ehi/BGD 8/0/0
AR4508 N08W37 Cso/B 0/0/0
AR4506 N12W86 Dao/B 1/0/0
NOAA messages
2026-08-19 17:57  Kp 4 expected (WARK04)
2026-08-19 05:45  Kp 5 (G1) reached (ALTK05)
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