• Weekly Highlights of Solar and Geomagnetic Activity, 29 August - 04 Sep

    From SWPC.Webmaster@noaa.gov@21:1/5 to All on Mon Sep 5 13:00:10 2022
    XPost: rec.radio.amateur.space, rec.radio.shortwave, rec.radio.info

    :Product: Weekly Highlights and Forecasts
    :Issued: 2022 Sep 05 0159 UTC
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    # Weekly Highlights and Forecasts
    Highlights of Solar and Geomagnetic Activity
    29 August - 04 September 2022

    Solar activity ranged from low to high levels during the period.
    High activity levels were observed on 29 Aug when Region 3088 (S27,
    L=300, class/area Dkc/650 on 27 Aug) produced an M8.6 x-ray event at
    29/1108 UTC. During the 29th, the region produced three additional
    M-class events including an M2.5 at 29/1456 UTC with an associated
    Type II (286 km/s), a Type IV Sweep and a 1000 sfu Tenflare.
    Moderate levels were observed on 30 Aug with a pair of small M-class
    events observed from Rgn 3088, including a long duration (LDE) M2.1
    at 30/1929 UTC. A weak Type II (332 km/s) Sweep was observed with a
    C5.4 event at 30/1720 UTC.

    Low activity levels were observed on 31 Aug - 04 Sep with numerous
    (43) C-class flares observed from Rgn 3089 (S23, L=195, class/area
    Ekc/520 on 04 Sep). Additional C-class activity was observed from
    Rgns 3092 (S09, L=095, class/area Cao/170 on 02 Sep), 3093 (S27,
    L=105, class/area Cro/030 on 04 Sep) and 3094 (N20, L=069,
    class/area Cao/100 on 02 Sep). Some weak CME activity was observed
    off the SW limb on 02 Sep that was analyzed as having a potential,
    weak Earth-directed component for 06 Sep.

    No proton events were observed at geosynchronous orbit. A weak
    enhancement to 0.88 pfu was observed at 30/0210 UTC associated with
    W limb M-class activity from Rgn 3088.

    The GOES-16 greater than 2 MeV electron flux at geosynchronous orbit
    was at normal to moderate levels on 29 Aug - 03 Sep and reached high
    levels on 04 Sep with a peak flux of 6,689 pfu observed at 04/1625

    Geomagnetic field activity was at quiet to active levels on 29 Aug -
    02 Sep due to negative polarity CH HSS influence coupled with SW
    limb CME effects on 29-30 Aug. By 03 Sep, and through 04 Sep, a
    large equatorial, positive polarity CH HSS moved into a geoeffective
    position. Steady Minor to Major geomagnetic storm activity was
    observed through both days. Total field values of 12 nT coupled with
    steady -12 nT Bz values were observed on the 3rd and 4th. Wind
    speeds reached maximum speeds of near 685 km/s through most of 04

    Forecast of Solar and Geomagnetic Activity
    05 September - 01 October 2022

    Solar activity is expected to be at very low to low levels through
    10 Sep. From 11 - 25 Sep, a chance for R1-R2, (Minor-Moderate) flare
    activity exists as previously active regions return to the visible
    disk. A return to very low levels is expected from 26 Sep - 01 Oct.

    No proton events are expected at geosynchronous orbit from 05 - 10
    Sep and 26 Sep - 01 Oct. There is a slight chance for a proton event
    from 11 Sep - 01 Oct.

    The greater than 2 MeV electron flux at geosynchronous orbit is
    expected to be at high levels on 05 - 11 Sep, 15 - 19 Sep, 25 - 28
    Sep and 01 Oct due to CH HSS influence.

    Geomagnetic field activity is expected to reach G1 (Minor) storm
    conditions on 05 Sep and 01 Oct due to CH HSS influence. Unsettled
    to active conditions are expected on 06 - 11 Sep, 13 - 17 Sep and 23
    - 30 Sep due to recurrent CH HSSs. Mostly quiet to unsettled levels
    are expected for the remainder of the period.

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