1. Forum
  2. Fidonet
  3. REC.RADIO.AMATEUR.SPACE

  • Weekly Highlights of Solar and Geomagnetic Activity, 24 - 30 August 202

    From SWPC.Webmaster@3:633/10 to All on Mon Aug 31 13:00:05 2026
    Subject: Weekly Highlights of Solar and Geomagnetic Activity, 24 - 30 August 2026

    :Product: Weekly Highlights and Forecasts
    :Issued: 2026 Aug 31 0155 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
    24 - 30 August 2026

    Solar activity was at very low to low levels from 27-30 Aug, reached
    R1 (Minor) levels on 24 and 26 Aug, and peaked at R2 (Moderate)
    levels on 25 Aug. Region 4513 (N04, L=54, class/area Ekc/310 on 25
    Aug) was responsible for all seven of the M-class
    (R1/R2-Minor/Moderate) flares throughout the period. The largest
    event was an M6.9/1b (R2) flare that peaked at 25/1002 UTC. This
    flare was accompanied by a Type II radio sweep, estimated speed of
    603 km/s, a 160 sfu F10.7 cm radio burst, and a CME first observed
    in LASCO C2 imagery at ~25/1100 UTC. Analysis of the CME indicated
    possible impacts at Earth on 28 Aug. Region 4513 also produced an
    M2.2/1b flare at 26/034 UTC that had a corresponding Type II radio
    sweep, estimated speed of 930 km/s, and a potentially Earth-directed
    CME. Analysis indicated the likely arrive window for the CMEs was on
    28-29 Aug. Region 4315 also contributed 14 C-class flares throughout
    the period.

    No proton events exceeding the S1 (Minor) alert threshold were
    observed at geosynchronous orbit. However, flux levels were elevated
    to near 7 nT and remained elevated from 24-26 Aug, after which they
    returned to near background conditions.

    The greater than 2 MeV electron flux at geosynchronous orbit was
    high levels from 24-28 Aug, then returned to normal to moderate
    levels from 29-30 Aug.

    Geomagnetic field activity was at unsettled levels on 24 Aug, quiet
    levels on 25-27 Aug, and reached active levels on 28-30 Aug under
    positive polarity coronal hole high speed stream influence.

    Forecast of Solar and Geomagnetic Activity
    31 August - 26 September 2026

    Solar activity is expected to be at very low to low levels, with a
    chance for moderate levels and a slight chance for high levels
    throughout the forecast period.

    No proton events are expected at geosynchronous orbit.

    The greater than 2 MeV electron flux at geosynchronous orbit is
    expected to be at high levels on 31 Aug - 06 Sep, then again from
    16-23 Sep. Levels are expected to be at normal to moderate levels
    from 07 - 15 Sep, and again from 24-26 Sep.

    Geomagnetic field activity is expected to decrease from unsettled
    levels on 31 Aug to mostly quiet levels from 01-11 Sep and again
    from 17-23 Sep. Unsettled to active conditions are expected from
    12-16 Sep due to negtive polarity CH HSS influence, then again from
    24-26 Sep under positive polarity CH HSS influence.


    --- PyGate Linux v1.5.19
    * Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)