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  • Weekly Highlights of Solar and Geomagnetic Activity, 11 - 17 October 20

    From SWPC.Webmaster@noaa.gov@21:1/5 to All on Mon Oct 18 13:00:16 2021
    XPost: rec.radio.amateur.space, rec.radio.shortwave, rec.radio.info

    :Product: Weekly Highlights and Forecasts
    :Issued: 2021 Oct 18 0131 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
    11 - 17 October 2021

    Solar activity was very low with B-class flare activity on 11-12,
    and 15-17 Oct. Low levels of solar activity were observed on 13-14
    Oct due to C-class flare activity. Region 2885 (N15, L=171,
    class/area=Cro/20 on 13 Oct) produced three C-class flares this
    period: a C1/Sf flare at 13/2204 UTC, a C2 flare at 14/0134 UTC, and
    a C1flare at 14/0304 UTC.

    No proton events were observed at geosynchronous orbit.

    The greater than 2 MeV electron flux at geosynchronous orbit was
    normal to moderate throughout the period.

    Geomagnetic field activity reached G1-G2 (Minor-Moderate)
    geomagnetic storm levels on 12 Oct due to the passage of a CME from
    09 Oct. Quiet to active conditions were observed on 17 Oct, also due
    to the passage of a transient feature. Quiet to unsettled conditions
    were observed on 11, 13, and16 Oct, while quiet conditions were
    observed throughout the remainder of the period.

    Forecast of Solar and Geomagnetic Activity
    18 October - 13 November 2021

    Solar activity is expected to be very low to low 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 26-28 Oct. Normal to moderate flux
    levels are expected to prevail throughout the remainder of the
    outlook period.

    Geomagnetic field activity is expected to reach active levels on
    18-19 Oct, and 06 Nov due to the influence of multiple, recurrent CH
    HSSs. The remainder of the outlook period is expected to be mostly
    quiet or quiet to unsettled.

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