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

  • Weekly Highlights of Solar and Geomagnetic Activity, 06 - 12 April 2026

    From SWPC.Webmaster@3:633/10 to All on Mon Apr 13 13:00:05 2026
    :Product: Weekly Highlights and Forecasts
    :Issued: 2026 Apr 13 0104 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
    06 - 12 April 2026

    Solar activity was at very low to moderate levels during the period.
    Moderate levels were reached on 09 Apr, with low levels observed on
    06-08 Apr and 11-12 Apr. Very low levels occurred on 10 Apr.

    Region 4409 (N02, L=158, class/area=Eai/190 on 07 Apr) was the most
    active region of the period, producing 11 C-class flares and the
    only M-class flare of the period, an impulsive M1.0/Sf at 09/0845
    UTC. Region 4417 (S08, L=123, class/area=Dao/30 on 12 Apr) also
    contributed notable activity with 7 C-class flares after appearing
    quickly on 11 Apr near the West limb. Other activity included a
    C8.7/Sf flare from Region 4414 (N15, L=26, class/area Dro/30 on 08
    Apr) at 08/1543 UTC, which was associated with Type III radio
    emissions and a weak CME without any Earth-directed components.

    No proton events were observed at geosynchronous orbit.

    The greater than 2 MeV electron flux at geosynchronous orbit was at
    high levels throughout the reporting period. Flux levels reached a
    peak value of 10,679 pfu at 09/1605 UTC.

    Geomagnetic field activity ranged from quiet to active levels during
    the period. The beginning of the period (06-07 Apr) saw quiet to
    unsettled conditions as the influence of a negative polarity coronal
    hole high speed stream (-CH HSS) continued to wane. From 10-12 Apr,
    quiet to active levels were observerd under the onset and influence
    of a positive polarity CH HSS (+CH HSS). Quiet conditions prevailed
    during all other days of the period under a nominal solar wind
    regime.

    Forecast of Solar and Geomagnetic Activity
    13 April - 09 May 2026

    Solar activity is expected to be at low levels, with a varying
    chance for M-class (R1-R2/Minor-Moderate) flares and a slight chance
    for X-class (R3/Strong or greater) flares through 09 May.

    No proton events are expected at geosynchronous orbit, barring any
    significant, non-recurrent solar activity.

    The greater than 2 MeV electron flux at geosynchronous orbit is
    expected to reach high levels on 13-17 Apr, 19-24 Apr, 26-28 Apr, 30
    Apr-05 May, and 08-09 May. Normal to moderate flux levels are
    expected on 18 Apr, 25 Apr, 29 Apr, and 06-07 May.

    Geomagnetic field activity is anticipated to reach G1-G2
    (Minor-Moderate) storm levels on 19 Apr and 29 Apr due to -CH HSS
    influences, and on 07 May due to +CH HSS influences. Active
    conditions are expected on 18 Apr, 20 Apr, and 30 Apr-01 May in
    response to -CH HSS effects, and on 15 Apr, 25 Apr, and 08 May due
    to +CH HSS effects. Mostly quiet to unsettled conditions are
    expected for all other days of the period.



    --- PyGate Linux v1.5.14
    * Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)