• Weekly Highlights of Solar and Geomagnetic Activity, 23 - 29 October 20

    From SWPC.Webmaster@noaa.gov@21:1/5 to All on Mon Oct 30 13:00:12 2023
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    :Product: Weekly Highlights and Forecasts
    :Issued: 2023 Oct 30 0127 UTC
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    # Weekly Highlights and Forecasts
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    Highlights of Solar and Geomagnetic Activity
    23 - 29 October 2023

    Solar activity reached moderate levels on 26 Oct due to an M1.4
    flare at 26/2324 UTC from the SE limb; the largest event of the
    period. Low levels of solar activity and C-class flares were
    observed throughout the remainder of the week. No Earth-directed
    CMEs were observed.

    No proton events were observed at geosynchronous orbit.

    The greater than 2 MeV electron flux at geosynchronous orbit was at
    normal to moderate levels over 23-28 Oct, with high levels observed
    on 29 Oct following a prolonged period of increased geomagnetic
    field activity and enhanced solar wind conditions.

    Geomagnetic field activity was at quiet levels with ambient solar
    wind conditions observed over 23-25 Oct. The effects of a CIR
    followed by positive polarity CH HSS influences produced periods of
    G1 (Minor) storm conditions on 26 Oct, and active conditions on 27
    Oct. The onset of another CIR followed by positive polarity CH HSS
    influences resulted in active conditions on 28 Oct, and periods of
    G1 (Minor) storms on 29 Oct.

    Forecast of Solar and Geomagnetic Activity
    30 October - 25 November 2023

    Solar activity is expected to be at low levels with a varying chance
    for M-class (R1-R2) flare activity throughout the outlook period.

    No proton events are expected at geosynchronous orbit.

    The greater than 2 MeV electron flux at geosynchronous orbit is
    expected to reach high levels on 30 Oct-05 Nov and 25 Nov. Normal to
    moderate flux levels are expected throughout the remainder of the
    period.

    Geomagnetic field activity is expected to reach G1 (Minor) storm
    levels on 30 Oct, and active levels on 31 Oct, in response to
    positive polarity CH HSS influences. Active conditions are expected
    on 09 Nov due to negative polarity CH HSS influences. Positive
    polarity CH HSS effects are expected to result in active levels on
    22 and 24-25 Nov. Quiet and quiet to unsettled conditions are
    expected throughout the remainder of the outlook period.

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