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  • Weekly Highlights of Solar and Geomagnetic Activity, 28 April - 04 May

    From SWPC.Webmaster@noaa.gov@3:633/280.2 to All on Tue May 6 03:00:05 2025
    Subject: Weekly Highlights of Solar and Geomagnetic Activity, 28 April - 04 May 2025

    :Product: Weekly Highlights and Forecasts
    :Issued: 2025 May 05 0116 UTC
    # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
    # Product description and SWPC contact on the Web
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    # Weekly Highlights and Forecasts
    #
    Highlights of Solar and Geomagnetic Activity
    28 April - 04 May 2025

    Solar activity reached moderate levels on 29 and 30 Apr due to
    M-Class flare activity. Region 4078 (N16, L=009, class/area=Cro/20
    on 29 Apr) produced an M1.3/1N flare at 29/1002 UTC and an M1.6/1N
    flare at 29/1057 UTC. Region 4079 (N07, L=242, class/area=Ekc/1210
    on 02 May) produced an M1.7 flare at 29/0513 UTC and an M2.0 flare
    at 30/0751 UTC, the largest of the period. Low levels were obsereved
    throughout the remainder of the period. No Earth-directed CME
    resulted from this week's flare activity.

    No proton events were observed at geosynchronous orbit.

    The greater than 2 MeV electron flux at geosynchronous orbit was at
    moderate levels on 28 Apr - 01 May, and reached high levels on 02-04
    May.

    Geomagnetic field activity was at quiet to unsettled levels on 28-29
    Apr. Activity increased to active levels on 30 Apr, and reached G1
    (Minor) levels on 01-05 May due to negative polarity coronal hole
    influence.

    Forecast of Solar and Geomagnetic Activity
    05 May - 31 May 2025

    Solar activity is expected to be predominently low through the
    outlook period, with a varying chance for M-class flare activity.

    No proton events are expected at geosynchronous orbit.

    The greater than 2 MeV electron flux at geosynchronous orbit is
    likely to reach high levels from 05-12 May and 29-31 May. Normal to
    moderate levels are expected from 13-28 May.

    Geomagnetic field activity is likely to reach G1 (Minor) storm
    levels on 18 May and 29-31 May due to negative polarity coronal hole
    influence. Periods of active conditions are likely on 05-06 May,
    09-11 May, 16-17 May, 19-21 May, and 27 May in response to CH HSS
    incluences. Quiet to unsettled conditions are expected to prevail
    throughout the remainder of the period.


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