☀ Helios Solar Watch · 2026-09-16 04:00 UTC
QUIET
Current geomagnetic activity is at unsettled levels with a Kp-index of 3.7. Solar activity remains low, characterized by a lack of significant eruptive events.
Visible light · 2 active regions
Extreme UV · 304 Å
Kp Index
3.7
5 or above = storm
Geomagnetic
G0
24 h max: G1
X-Ray
A/B
quiet
⚠ Kp 4 reached · 4 more below
Next 24 h
Geomagnetic activity is expected to trend downward, with the Kp-index likely hovering between 2.6 and 3.0 throughout the next 24 hours.
more
No significant storming is anticipated, though moderate C-class flare activity remains possible given the number of active regions.
🌌 Aurora
Aurora visibility is restricted to high latitudes.
more
Observers at mid-latitudes are unlikely to witness significant auroral displays under current conditions.
👁 Watch for
Monitor the evolution of active regions AR4527 and AR4528 for any sudden increases in magnetic complexity that could lead to impulsive M-class flares.
▸ 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
101.0
sfu
101.0
sfu
| Region | Location | Class | Flares C/M/X |
|---|---|---|---|
| AR4527 | N05W74 | Hax/A | 0/0/0 |
| AR4528 | S11W57 | Hsx/A | 0/0/0 |
NOAA messages
2026-09-16 00:34 Kp 4 reached (ALTK04)
2026-09-15 18:56 Kp 5 (G1) expected (WARK05)
2026-09-15 18:50 Kp 4 expected (WARK04)
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