☀ Helios Solar Watch · 2026-09-17 04:00 UTC
QUIET
Geomagnetic activity is currently unsettled at Kp 3.0 following a brief period of elevation. Solar flare production remains low with only minor background activity observed.
Visible light · 2 active regions
Extreme UV · 304 Å
Kp Index
3.0
5 or above = storm
Geomagnetic
G0
24 h max: G1
X-Ray
A/B
quiet
⚠ Kp 4 expected · 4 more below
Next 24 h
Geomagnetic conditions are expected to taper from unsettled levels back toward quiet states over the next 24 hours.
more
No significant solar radiation or radio blackouts are anticipated given the current lack of eruptive potential in the active regions.
🌌 Aurora
Aurora visibility is largely restricted to high latitudes.
more
Observers at mid-latitudes are unlikely to see significant activity unless conditions shift unexpectedly.
👁 Watch for
Monitor the development or emergence of new active regions on the solar disk, as current flare probabilities remain dominated by baseline C-class potential.
▸ 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
97.0
sfu
97.0
sfu
| Region | Location | Class | Flares C/M/X |
|---|---|---|---|
| AR4528 | S11W70 | Hsx/A | 0/0/0 |
| AR4527 | N03W85 | Hax/A | 0/0/0 |
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