☀ Helios Solar Watch · 2026-10-18 04:00 UTC
QUIET
Solar activity remains at low levels with the planetary K-index holding steady at Kp 2.0. No significant geomagnetic or radiation storms are currently affecting Earth’s environment.
Visible light · 3 active regions
Extreme UV · 304 Å
Kp Index
2.0
5 or above = storm
Geomagnetic
G0
24 h max: G0
X-Ray
A/B
quiet
⚠ Kp 20 possible · 4 more below
Next 24 h
Geomagnetic conditions are expected to remain quiet, with the Kp-index likely hovering between 1.0 and 2.0 for the next 24 hours. No meaningful disturbances to power grids, radio communications, or satellite operations are anticipated.
🌌 Aurora
Aurora activity will be confined to high latitudes.
more
Observers at mid-latitudes (40-60°N) should not expect any visible auroral displays under these conditions.
👁 Watch for
Monitor AR4551 as it rotates further across the disk for any unexpected increase in flare intensity.
▸ 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
109.0
sfu
109.0
sfu
| Region | Location | Class | Flares C/M/X |
|---|---|---|---|
| AR4551 | S15W32 | Eki/BG | 6/0/0 |
| AR4555 | S07W84 | Axx/A | 0/0/0 |
| AR4557 | N17E01 | Dai/B | 0/0/0 |
NOAA messages
2026-10-17 20:14 Kp 20 possible (WATA20)
2026-10-16 19:39 Kp 4 reached (ALTK04)
2026-10-16 19:38 Kp 4 expected (WARK04)
2026-10-16 14:19 Electron flux F3 reached (ALTEF3)
2026-10-11 17:02 Kp 30 possible (WATA30)
Helios Observer · Data: NOAA SWPC · updated every 12 h