615
FXXX06 KWNP 160226
WEKHIL

:Product: 7-day Space Weather Highlights
:Issued: 2025 Jun 16 0159 UTC
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#                7-day Space Weather Highlights
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Highlights of Solar and Geomagnetic Activity
09 - 15 June 2025

Solar activity was at low levels over 09-12 Jun, moderate levels on
13 Jun, and high levels on 14-15 Jun. In total, five R1 (Minor)
events and two R2 (Moderate) events were observed this period, the
largest of which was an M8.4/1b flare at 15/1807 UTC from Region
4114 (N17, L=34, class/area=Ekc/380 on 15 Jun). Associated with the
M8.4 flare were multi-frequency radio bursts, Castelli U signature,
an 1800 sfu Tenflare, Type II (397 km/s) and IV radio sweeps. Region
4105 (S15, L=131, class/area=Eki/310 on 14 Jun) produced an M6.8/1n
flare at 14/2301 UTC.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at
normal to moderate levels throughout the period.

Geomagnetic field activity reached active levels on 09 Jun in
response to the effects of a CME that left the Sun on 03 Jun, in
addition to negative polarity CH HSS influences. Negative polarity
CH HSS influences persisted over 10-12 Jun, with quiet to unsettled
levels observed on 10 Jun, and periods of active conditions and G1
(Minor) geomagnetic storming observed on 11-12 Jun. Sustained G1-G2
(Minor-Moderate) storm periods were observed on 13 Jun following the
arrival of a CME that left the Sun on 08 Jun. Periods of G1 (Minor)
storming were observed on 14 Jun as CME effects waned and were
followed by the onset of positive polarity CH HSS influences.
Positive polarity CH HSS influences continued on 15 Jun with quiet
to unsettled levels observed.