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Subject: Weekly Highlights of Solar and Geomagnetic Activity, 27 January - 02 February 2025
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:Product: Weekly Highlights and Forecasts
:Issued: 2025 Feb 03 0137 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# https://www.swpc.noaa.gov/content/subscription-services
#
#                Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity
27 January - 02 February 2025

Solar activity ranged from low to moderate levels (R2-Moderate).
Minor (R1-Minor) levels were observed on 27-29 Jan, 31 Jan and 01-02
Feb. Moderate (R2-Moderate) levels were observed on 31 Jan and 02
Feb. Region 3976 (N13, L=001, class/area Ekc/260 on 02 Feb) produced
31 C-class flares and 2 M-class flares, the largest an M2.6 at
27/0812 UTC. Region 3977 (N19, L=002, class/area Cao/120 on 02 Feb
produced 10 C-class flares and 6 M-class flares, the largest an M5.1
at 02/1404 UTC. 

Region 3978 (N11, L=350, class/area Dai/200 on 02 Feb) produced 5
C-class flares and 1 M-class flare, the largest an M6.7/1n at
31/1406 UTC. Associated with this event was a 270 pfu 10cm burst and
a 673 km/s Type II sweep. Region 3981 (N05, L=338, class/area
Dsi/190 on 02 Feb) produced 10 C-class flares and 4 M-class flares,
the largest an M4.1 at 02/2324 UTC. All other active regions were
either quiet or contributed C-class events. Potential Earth-directed
CMEs were observed on 29 and 31 Jan. 

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at
high levels on 02 Feb with a maximum flux of 1,653 pfu at 02/1550
UTC. Normal to moderate levels were observed on 27-31 Jan and 01
Feb. 

Geomagnetic field activity was at quiet to active levels. Unsettled
to active levels were observed on 27-28 Jan due to weak CME effects.
Mostly quiet levels were observed on 29-31 Jan. Unsettled to active
levels were observed on 01-02 Feb due to positive polarity CH HSS
effects. Solar wind parameters were slightly enhanced on 27-29 Jan
due to weak CME effects. Greater enhancements were observed on 01-02
Feb with total field at highs of 18 nT and the Bz component reaching
-17 nT at times. Wind speeds increased from about 410 km/s to about
750 km/s late on 01 Feb. 

Forecast of Solar and Geomagnetic Activity
03 February - 01 March 2025

Solar activity is expected to be at R1-R2 (Minor-Moderate) levels
throughout a majority of the outlook period, all due to numerous,
significant solar regions expected on the solar disk. 

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is
expected to be at high levels on 03-04 Feb, 18-19 Feb, 27-28 Feb and
01 Mar, all due to CH HSS effects. Normal to moderate levels are
expected on 05-17 Feb and 20-26 Feb. 

Geomagnetic field activity is expected to be at unsettled to active
levels on 03-05 Feb due to a combination of positive polarity CH HSS
and weak CME effects. Unsettled to active levels are expected on
10-19 Feb due to recurrent negative polarity CH HSS effects.
Unsettled to minor storm (G1-Minor) levels are expected on 27-28 Feb
and 01 Mar due to positive polarity CH HSS effects.