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

  • Weekly Highlights of Solar and Geomagnetic Activity, 14 - 20 July 2025

    From SWPC.Webmaster@noaa.gov@3:633/280.2 to All on Tue Jul 22 03:00:04 2025
    Subject: Weekly Highlights of Solar and Geomagnetic Activity, 14 - 20 July 2025

    :Product: Weekly Highlights and Forecasts
    :Issued: 2025 Jul 21 0208 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
    14 - 20 July 2025

    Solar activity was at low levels. The largest flare was a C7.6 from
    Region 4136 (N20, L=17, class/area=Cao/210 on 20 Jul) at 20/0741
    UTC. C-class activity was also observed from several other regiond
    during the highlight period. No Earth-directed CME activity was
    observed.

    No proton events were observed at geosynchronous orbit.

    The greater than 2 MeV electron flux at geosynchronous orbit was at
    high levels on 14-20 Jul in response to persistent positive polarity
    CH HSS influence.

    Geomagnetic field activity reached G1 (Minor) storm levels on 14,
    15, and 17 Jul due to positive polarity CH HSS influence. Solar wind
    speeds were elevated to as high as 700 km/s on 15 and 17 Jul. The
    remaining days were at quiet to active levels despite enhanced solar
    wind parameters.

    Forecast of Solar and Geomagnetic Activity
    21 July - 16 August 2025

    Solar activity is expected to be at mostly low levels with a chance
    for M-class (R1-R2, Minor to Moderate) flares for the outlook
    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 21-22 Jul, 24-30 Jul, 5-6 Aug, and
    10-16 Aug all due to recurrent CH HSS influences. Low to moderate
    levels are expected on the remaining days.

    Geomagnetic field activity is expected to be at active to G1 (Minor)
    storm levels on 23 Jul, 1-4 Aug and, 7-14 Aug due to recurrent CH
    HSS effects. Quiet to unsettled levels are expected on the remaining
    days of the outlook peirod.


    --- MBSE BBS v1.1.1 (Linux-x86_64)
    * Origin: NOAA Space Weather Prediction Center (3:633/280.2@fidonet)