VA2OM > SOLAR 01.12.25 09:30l 70 Lines 3102 Bytes #200 (0) @ WW BID : 53388_VE2PKT Read: GUEST Subj: Solar and Geomagnetic Activity Path: ED1ZAC<ED1ZAC<DB0APK<DK0WUE<PD0LPM<VE3CGR<VE6NAS<VE2PKT Sent: 251201/1013Z 53388@VE2PKT.#TRV.QC.CAN.NOAM LinBPQ6.0.25 :Product: Weekly Highlights and Forecasts :Issued: 2025 Dec 01 0212 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 November 2025 Solar activity was at low levels over 24-27 and 30 Nov with C-class flare activity observed. High levels of solar activity were observed on 28 Nov when Region 4294 (S15, L=293, class/area=Fkc/1100 on 30 Nov) produced an impulsive M5.9 flare (R2-Moderate) at 28/2222 UTC, with Type-II (828 km/s) and Tenflare (240 sfu) radio emissions, as the region rotated onto the disk from the SE limb. Solar activity reached high levels again on 29 Nov with six M-class flares (R1-Minor) observed from Region 4294. No Earth-directed CMEs were detected during the summary period. No proton events were observed at geosynchronous orbit. The greater than 2 MeV electron flux at geosynchronous orbit was a normal to moderate levels on 24-27 Nov, with high levels observed on 28-30 Nov. Geomagnetic field activity reached active levels on 24 Nov, and G1 (Minor) storm levels on 25 Nov, due to negative polarity CH HSS influences. Active levels were observed again on 26 Nov as negative polarity CH HSS influences subsided, followed by the onset of positive polarity CH HSS influences. Periods of G1 (Minor) storming were observed on 27 Nov, with periods of active conditions observed over 28-30 Nov, due to continued positive polarity CH HSS influences. Forecast of Solar and Geomagnetic Activity 01 December - 27 December 2025 Solar activity is likely to reach moderate to high levels during the outlook period. M-class flares (R1-R2/Minor-Moderate) are likely, with slight chance for X-flares (R3-Strong or greater), through 12 Dec due primarily to the flare potential of Region 4294. There exists a slight chance for the greater than 10 MeV proton flux to reach S1 (Minor) solar radiation storm levels through 12 Dec, due primarily to the eruptive potential of Region 4294. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach high levels on 01-06, 16-17, and 24-27 Dec. Normal to moderate levels are expected to prevail throughout the remainder of the outlook period. Geomagnetic activity is likely to reach active levels on 03 and 06 Dec, and G1 (Minor) storm levels on 04-05 Dec, driven by influences from a negative polarity CH HSS. Additional G1 storm periods are likely on 13 Dec, with active levels likely on 14 Dec, again associated with negative polarity CH HSS effects. Active conditions are likely on 21 Dec, followed by G1 storm levels on 22 Dec, in response to negative polarity CH HSS influences. Further G1 storm periods are likely on 23-26 Dec, with active levels likely on 27 Dec, due to positive polarity CH HSS influences. Quiet and quiet to unsettled conditions are expected to prevail throughout the remainder of the outlook period. 73 de VA2OM, SYSOP of VE2PKT
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