Solar Watch — September 25, 2026 | 06:00 UTC

☀ Helios Solar Watch · 2026-09-25 04:00 UTC
QUIET

Geomagnetic conditions are currently unsettled with a Kp-index of 3.7, though no significant storm activity is occurring. Solar activity remains moderate, characterized by routine C-class flare production from active regions.

HMI Continuum Intensity

Visible light · 8 active regions

SUVI 304 — Extreme UV

Extreme UV · 304 Å

Kp Index
3.7
5 or above = storm

Geomagnetic
G0
24 h max: G0

X-Ray
A/B
quiet


⚠ Kp 4 reached · 3 more below
Next 24 h

Geomagnetic activity is expected to remain in the unsettled range, with Kp levels likely to hover between 2.0 and 3.6 over the next 24 hours.

more

No significant space weather impacts are anticipated for satellite operations or power grids during this period.

🌌 Aurora

Auroral activity is expected to remain confined to high latitudes.

more

Observers in mid-latitudes (40-60°N) are unlikely to see significant displays, as current conditions do not reach the threshold for widespread mid-latitude visibility.

👁 Watch for

Monitor active region AR4536 for potential evolution, as its magnetic complexity and recent C-class activity suggest it warrants observation for further flare development.

▸ Detailed readings

Radio blackout
 R0
(24 h max R0)
Radiation
 S0
(24 h max S0)
F10.7
 115.0
sfu

Region Location Class Flares C/M/X
AR4538 N11W49 Dsi/B 0/0/0
AR4542 S18E22 Bxo/B 0/0/0
AR4536 N03W39 Dsi/B 1/0/0
AR4533 S14E09 Hrx/A 0/0/0
AR4535 N12E21 Dso/B 0/0/0
AR4534 N11W61 Cao/B 0/0/0
AR4537 N07W53 Dao/B 0/0/0
AR4539 S09W01 Axx/A 0/0/0
NOAA messages
2026-09-25 03:00  Kp 4 reached (ALTK04)
2026-09-25 02:26  Kp 4 expected (WARK04)
2026-09-21 18:32  Kp 20 possible (WATA20)
2026-09-15 18:56  Kp 5 (G1) expected (WARK05)


Helios Observer · Data: NOAA SWPC · updated every 12 h