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  • Weekly Highlights of Solar and Geomagnetic Activity, 07 - 13 April 2025

    From SWPC.Webmaster@noaa.gov@3:633/280.2 to All on Tue Apr 15 03:00:08 2025
    Subject: Weekly Highlights of Solar and Geomagnetic Activity, 07 - 13 April 2025

    :Product: Weekly Highlights and Forecasts
    :Issued: 2025 Apr 14 0137 UTC
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    # Weekly Highlights and Forecasts
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    Highlights of Solar and Geomagnetic Activity
    07 - 13 April 2025

    Solar activity was at high levels on 12-13 April due to the rapid
    growth and complexity of Region 4055 (N07 L=235, class/area Ekc/820
    on 13 April). This region totalled 19 M-class flares during the
    highlight period. The largest was an M3.2 flare at 1851 UTC on 13
    April. Region 4048 (S16 L=279, class/area Fkc/460 on 07 April)
    produced M-class activity as well. Other highlights included
    filament activity in the south central portion of the disk. Two
    filament eruptions were observed. The first was approximately 20
    degrees long, centered near S20E20, and began erupting after
    ~12/2130 UTC. The second filament was approximately 12 degrees long,
    centered near S22W09, and began erupting after ~13/0500 UTC. CME
    signatures were observed in subsequent coronagraph imagery following
    each event. Initial analysis and modeling indicated a likely
    Earth-directed component, with anticipated arrival at Earth near
    midday on 16 Apr.

    No proton events were observed at geosynchronous orbit.

    The greater than 2 MeV electron flux at geosynchronous orbit was at
    moderate to high levels on 07-13 Apr due to the influence of various
    CH HSSs.

    Geomagnetic field activity reached G1 (Minor) storm levels on 08-09,
    and 12 April all due to influences from CH HSSs. Unsettled to active
    levels were observed on the remaining days in the highlight period.

    Forecast of Solar and Geomagnetic Activity
    14 April - 10 May 2025

    Solar activity is expected to be at moderate to high levels on 27
    April - 10 May with the return of Region 4055. Low to moderate
    levels are expected for the remainder of the outlook period.

    No proton events are expected at geosynchronous orbit.

    The greater than 2 MeV electron flux at geosynchronous orbit is
    expected to be at moderate to high levels on 14-15, and 23-28 April,
    03-10 May due to the influences of recurrent CH HSS activity.

    Geomagnetic field activity is expected to be at G2 (Moderate) storm
    levels on 16 April due to the anticipated arrival of a CME that left
    the Sun on 13 April. G2 storm levels are expected again on 02 May
    due to recurrent CH HSS influences. G1 (Minor) storm levels are
    expected on 17 April, 01 May, and 05-06 May, all due to recurrent CH
    HSS activity. Unsettled to active levels are expected on 14-15
    April, 18 April, 22-23 April, 03-04 May, and 07-09 May, all due to
    recurrent CH HSS activity as well. Quiet to unsettled levels are
    expected for the remaining days in the outlook period.


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    * Origin: NOAA Space Weather Prediction Center (3:633/280.2@fidonet)