VA2OM > SOLAR 05.01.26 09:30l 69 Lines 3082 Bytes #197 (0) @ WW BID : 56628_VE2PKT Subj: Solar and Geomagnetic Activity Path: ED1ZAC<ED1ZAC<DB0APK<DK0WUE<PD0LPM<VE3CGR<VE2PKT Sent: 260105/1013Z 56628@VE2PKT.#TRV.QC.CAN.NOAM LinBPQ6.0.25 :Product: Weekly Highlights and Forecasts :Issued: 2026 Jan 05 0224 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 29 December - 04 January 2026 Solar activity ranged from low to high levels. High levels were observed on 31 Dec following an M7.1/1N flare at 31/1351 UTC from Region 4324 (N25, L=288, class/area=Dao/230 on 29 Dec). Associated with the event was Type IV and Type II radio sweep, a Tenflare, and a CME signature to the NE in subsequent coronagraph imagery. Modeling of the CME event suggested passage by Earth late on 03 Jan. Moderate levels were observed on 01 Jan following an M1/Sf flare at 29/0651 from Region 4325 (S08, L=296, class/area=Eki/330 on 01 Jan). The other 21 numbered active regions across the visible disk this week were either quiet or only produced C-class activity. A Type II radio sweep was reported on 02 Jan but was associated with a CME that erupted from beyond the W limb. No proton events were observed at geosynchronous orbit. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels over the past seven days. Geomagnetic field activity was at mostly quiet to unsettled levels on everyday but 02 Jan. G1 (Minor) geomagnetic storm levels were observed on late on 02 Jan following the arrival of the last of a set of weak CMEs that left the Sun over 28-31 Dec. Total magnetic field strength reached a peak of 09 nT as the CME passed. Bz reached as far south as -8 nT. Solar wind speeds peaked between ~600-700 km/s. While influence from a negative polarity coronal hole was observed beginning on 31 Dec, no significant geomagnetic activity was observed from the feature over the following days. Forecast of Solar and Geomagnetic Activity 05 January - 31 January 2026 Solar activity is likely to remain at low levels, with a chance for moderate (R1-Minor) conditions and a slight chance for high (R2/R3-Moderate-Strong) over the next solar rotation due to multiple regions on the visible disk as well as regions expected to return from the Sun's farside. No proton events are expected at geosynchronous orbit. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach high levels on 05 Jan and 15 Jan - 13 Jan due to the anticipated influence of multiple, recurrent coronal holes. The remainder of the outlook period is likely to at normal to moderate levels. Geomagnetic field activity is likely to reach G1 (Minor) geomagnetic storm levels on 13-14 Jan, 17-20 Jan, and 29 Jan; active levels are likely on 05 Jan and 28 Jan; unsettled levels are likely on 09-10 Jan, 12 Jan, 21-22 Jan, 27 Jan, and 30-31 Jan. All enhancements in geomagnetic activity are due to the anticipated influence of multiple, recurrent, coronal holes. The remainder of the outlook period is expected to be mostly quiet. 73 de VA2OM, SYSOP of VE2PKT
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