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  • Weekly Highlights of Solar and Geomagnetic Activity, 15 - 21 March 2021

    From SWPC.Webmaster@noaa.gov@21:1/5 to All on Mon Mar 22 13:00:22 2021
    XPost: rec.radio.amateur.dx, rec.radio.shortwave, rec.radio.info

    :Product: Weekly Highlights and Forecasts
    :Issued: 2021 Mar 22 0107 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
    15 - 21 March 2021

    Solar activity was very low throughout the reporting period. Region
    2808 (N19, L=035, class/area, Cao/30 on 12 Mar), Region 2810 (N18,
    L=307, class/area, Hax/50 on 17 Mar), and Region 2811 (N21, L=248,
    class/area, Bxo/10 on 21 Mar) all produced low level B-class flare
    activity. The largest event was a B3 flare from Region 2808 at
    16/2026 UTC. No Earth-directed CMEs were observed in available
    imagery.

    No proton events were observed at geosynchronous orbit.

    The greater than 2 MeV electron flux at geosynchronous orbit reached
    high levels on 15-19 and 21 Mar, with moderate levels observed on 20
    Mar.

    Geomagnetic field activity reached G2 (Moderate) geomagnetic storm
    levels on 20 Mar, with G1 (Minor) storm levels on 21 Mar due to
    recurrent, negative-polarity CH HSS activity. Unsettled conditions
    were observed on 15 and 19 Mar. Quiet levels were observed for the
    remainder of the reporting period (16-18 Mar).

    Forecast of Solar and Geomagnetic Activity
    22 March - 17 April 2021

    Solar activity is expected to be very low, with a slight chance for
    C-class flare events, 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 22-26, 30-31 Mar, and 01-13, 17
    Apr. Moderate levels are expected during the remainder of the
    outlook period (27-29 Mar, 14-16 Apr).

    Geomagnetic field activity is likely to reach G1 (Minor) geomagnetic
    storm levels on 22, 28-30 Mar and 10, 16-17 Apr, with active
    conditions likely on 23-24 Mar, 02, 08-09 Apr due to recurrent CH
    HSS activity. Quiet to unsettled levels are anticipated throughout
    the remainder of the outlook period.

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