Subject: Weekly Highlights of Solar and Geomagnetic Activity, 20 - 26 January 2025

:Product: Weekly Highlights and Forecasts
:Issued: 2025 Jan 27 0230 UTC
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# Weekly Highlights and Forecasts
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Highlights of Solar and Geomagnetic Activity
20 - 26 January 2025

Solar activity ranged from low to moderate levels (R1-Minor).
Moderate levels were observed on 21 Jan from Region 3967 (S14,
L=148, class/area Eai/110 on 21 Jan) with an M3.3/Sf observed at
21/1039 UTC. This flare also produced a Type II sweep with an
estimated shock velocity of 565 km/s. Region 3961 (S09, L=181,
class/area Fkc/800 on 20 Jan) produced an M1.3/1f at 22/1108 UTC
with a Type II sweep with an estimated shock velocity of 561 km/s.
This region also produced an M2.7/1f flare at 24/2104 UTC. All other
active regions were either quiet or contributed only C-class events.
Potential Earth-directed CMEs were observed on 21 and 22 Jan.

No proton events were observed at geosynchronous orbits.

The greater than 2 MeV electron flux at geosynchronous orbit reached
high levels on 20, 22 anmd 23 Jan. Normal to moderate levels were
observed on 21 and 24-26 Jan.

Geomagnetic field activity was at quiet to active levels. Isolated
active period were reached on 20 Jan with unsettled levels observed
on 20-24 Jan. Quiet levels were observed on 25-26 Jan. All
elevations in geomagnetic activity were attributed to influence from
multiple, negative polarity CH HSSs.

Forecast of Solar and Geomagnetic Activity
27 January - 22 February 2025

Solar activity ranged from low to moderate levels (R1-Minor).
Moderate levels were observed on 21 Jan from Region 3967 (S14,
L=148, class/area Eai/110 on 21 Jan) with an M3.3/Sf observed at
21/1039 UTC. This flare also produced a Type II sweep with an
estimated shock velocity of 565 km/s. Region 3961 (S09, L=181,
class/area Fkc/800 on 20 Jan) produced an M1.3/1f at 22/1108 UTC
with a Type II sweep with an estimated shock velocity of 561 km/s.
This region also produced an M2.7/1f flare at 24/2104 UTC. All other
active regions were either quiet or contributed only C-class events.
Potential Earth-directed CMEs were observed on 21 and 22 Jan.

No proton events were observed at geosynchronous orbits.

The greater than 2 MeV electron flux at geosynchronous orbit reached
high levels on 20, 22 anmd 23 Jan. Normal to moderate levels were
observed on 21 and 24-26 Jan.

Geomagnetic field activity was at quiet to active levels. Isolated
active period were reached on 20 Jan with unsettled levels observed
on 20-24 Jan. Quiet levels were observed on 25-26 Jan. All
elevations in geomagnetic activity were attributed to influence from
multiple, negative polarity CH HSSs.

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