☀ Helios Solar Watch · 2026-09-21 16:00 UTC
QUIET
The Sun is currently in a period of low activity, with geomagnetic levels remaining at baseline. No significant solar disturbances are expected to impact Earth in the next 24 hours.
Visible light · 5 active regions
Extreme UV · 304 Å
Kp Index
0.7
5 or above = storm
Geomagnetic
G0
24 h max: G0
X-Ray
A/B
quiet
⚠ Kp 4 expected · 4 more below
Next 24 h
Expect geomagnetic conditions to persist at Kp 1-2 through the next 24 hours. Solar activity will likely continue its current trend with only minor flare probabilities, posing no risk to space weather infrastructure.
🌌 Aurora
Aurora visibility is not expected for mid-latitudes.
more
The lack of geomagnetic disturbance limits potential sightings to the immediate polar regions.
👁 Watch for
Monitor the development of Active Region AR4534 as it rotates across the solar disk, as its configuration remains the primary candidate for potential flare activity.
▸ Detailed readings
Radio blackout
R0
(24 h max R0)
R0
(24 h max R0)
Radiation
S0
(24 h max S0)
S0
(24 h max S0)
F10.7
95.0
sfu
95.0
sfu
| Region | Location | Class | Flares C/M/X |
|---|---|---|---|
| AR4532 | S05W66 | Bxo/B | 0/0/0 |
| AR4536 | N03E02 | Bxi/B | 0/0/0 |
| AR4533 | S13E52 | Cso/B | 0/0/0 |
| AR4535 | N12E61 | Cao/B | 0/0/0 |
| AR4534 | N10W21 | Dri/B | 2/0/0 |
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