774
FXXX06 KWNP 010156
WEKHIL

:Product: 7-day Space Weather Highlights
:Issued: 2025 Sep 01 0133 UTC
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#                7-day Space Weather Highlights
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Highlights of Solar and Geomagnetic Activity
25 - 31 August 2025

Solar activity was at low levels on 27 and 31 Aug. Activity reached
moderate levels on 25, 26, and 28-30 Aug. Region 4197 (S17, L=131,
class/area-Eki/720 on 27 Aug) produced six M-class flares, the
largest being an M4.5/1n at 26/0525 UTC. Region 4199 (N04, L=115,
class/area-Cao/200 on 26 Aug) produced five M-class flares, with its
largest being an M4.5 flare as well, reaching a peak at 25/0524 UTC.
This region was also responsible for a long-duration M2.7 flare at
30/1911 UTC. The associated full halo CME is forecast to arrive at
Earth sometime late on 01 Sep into early on 02 Sep.

The greater than 10 MeV proton flux at geosynchronous orbit reached
S1 (Minor) storm levels at 25/1355 UTC, observed a peak of 13 pfu at
27/0740 UTC, and decreased below threshold at 27/1510 UTC. Levels
remained enhanced, but below the 10 pfu threshold, for the remainder
of the period.

The greater then 2 MeV electron flux at geosynchronous orbit was at
high levels on 25 Aug, but returned to normal to moderate levels
from 26-31 Aug.

Geomagnetic field activity reached unsettled levels on 25-28 Aug and
again on 31 Aug. Field activity was at low levels on 29-30 Aug.