783
FXXX06 KWNP 170156
WEKHIL

:Product: 7-day Space Weather Highlights
:Issued: 2025 Mar 17 0140 UTC
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#                7-day Space Weather Highlights
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Highlights of Solar and Geomagnetic Activity
10 - 16 March 2025

Solar activity was at moderate levels on 11 and 14 March with two
M1.1 flares observed. The first M1.1 flare was observed at 11/1304
UTC from Region 4024 (N05, L=289, class/area Cro/020 on 11 Mar). The
second M1.1 flare was observed at 14/2221 UTC from Region 4030 (S16,
L=123, class/area Eso/090 on 15 Mar). No significant radio or CMEs
were associated with these events. The remainder of the highlight
period was at low levels.

At about 16/0900 UTC, dimming and a possible DSF was observed near
Region 4023 (N25, L=177, class/area Hsx/030 on 11 Mar). A likely
faint, slow CME was observed in LASCO C2 imagery with a weak
Earth-directed component expected to arrive midday on 20 Mar.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at
high levels on 10-16 March with a peak flux of 5,060 pfu observed at
16/1445 UTC.

Geomagnetic field activity was at quiet to unsettled levels on 10-11
March. Activity levels increased to active to minor storm (G1-Minor)
levels on 12-13 March and an isolated moderate storm (G2-Moderate)
level early on 14 March. Unsettled to active levels were observed
for the remainder of 14 March through 15 March with mostly quiet to
unsettled levels on 16 March. The enhanced activity levels on 12-16
March were due to a negative polarity CH HSS. During the active
period, solar wind speeds peaked at 500-550 km/s, Bt reached 12 nT
and Bz reached -10 nT levels.