:Product: Weekly Highlights and Forecasts :Issued: 2024 Dec 09 0103 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 02 - 08 December 2024 Solar activity reached high levels on 08 Dec when Region 3912 (S07, L=80, class/area=Dai/220 on 07 Dec) produced an impulsive X2.2/2b flare at 08/0906 UTC; the largest event of the period. Associated with the X2.2 flare was a Castelli-U radio burst, a 870 sfu Tenflare, and a 360 sfu Type-II radio sweep. Regions 3912 and 3917 (S07, L=09, class/area=Dac/210 on 08 Dec) produced the bulk of the M-class flares (R1-Minor events) observed over the course of the week. No Earth-directed CMEs were detected as a result of this week's activity. No proton events were observed at geosynchronous orbit. The greater than 2 MeV electron flux at geosynchronous orbit was at normal to moderate levels throughout the period. Geomagnetic field activity reached active levels on 03 Dec due to the passage of a CME from 27 Nov. Quiet and quiet to unsettled levels were observed throughout the remainder of the period. Forecast of Solar and Geomagnetic Activity 09 December - 04 January 2025 Solar activity is likely to reach moderate levels. M-class flares (R1-R2/Minor-Moderate) are likely, with a slight chance for X-class flares (R3-Strong or greater), throughout much of the outlook period. No proton events are expected at geosynchronous orbit; barring significant flare activity. The greater than 2 MeV electron flux at geosynchronous orbit is expected to be at normal to moderate levels throughout the outlook period. Geomagnetic field activity is expected to be quiet and unsettled over 09-14 Dec due to positive polarity CH HSS influences. Quiet and unsettled conditions are likely over 16-20 Dec, with active conditions possible on 19 Dec, due to negative polarity CH HSS influences.