:Product: Forecast Discussion :Issued: 2026 Mar 10 0030 UTC # Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center # Solar Activity .24 hr Summary... Solar activity was low. Low-level C-class flares were observed from Regions 4381 (N09W50, Eso/beta) and 4387 (N09E53, Dro/beta), with the largest event being a C7.8 at 09/2038 UTC from Region 4387. Region 4381 simplified with some dissipation of its intermediate spots, while Region 4384 (N09W27, Cso/beta) showed a decline in its trailing spot. Region 4385 (S09, L=161) has decayed to plage. Region 4387 remained relatively stable throughout the period. Region 4388 (S16W20, Bxo/beta) was numbered this period and showed some evolution with new flux emergence and reconfiguration of the group, though its overall extent remained largely unchanged. Near the northeast limb, new activity is rotating into view behind Region 4387. Due to its proximity to the limb and associated foreshortening, it is difficult to determine if this represents one or two distinct sunspot groups, and a definitive characterization of its extent and magnetic complexity is pending further rotation onto the disk. No Earth-directed CMEs were observed in available coronagraph imagery. .Forecast... Solar activity is expected to be at low levels, with a slight chance for M-class (R1-R2/Minor-Moderate) flares through 12 Mar. Energetic Particle .24 hr Summary... The greater than 2 MeV electron flux reached high levels with a peak flux of 1,320 pfu observed at 09/1610 UTC. The greater than 10 MeV proton flux was at background levels. .Forecast... The greater than 2 MeV electron flux is expected to reach high levels on 10-12 Mar. The greater than 10 MeV proton flux is expected to continue at background levels through 12 Mar. Solar Wind .24 hr Summary... Solar wind parameters were indicative of waning, negative-polarity, CH HSS influence. Solar wind speed decreased from approximately 525 km/s to near 450 km/s. Total field ranged from 1-6 nT while the Bz component was between +/-5 nT. Phi angle was predominantly negative. .Forecast... Mildly enhanced solar wind parameters are expected to continue through 10 Mar as HSS conditions continue to wane, alongside possible transient influences from the 06 Mar CME. A return to nominal levels is expected on 11-12 Mar. Geospace .24 hr Summary... The geomagnetic field was quiet to unsettled. .Forecast... The geomagnetic field is expected to be quiet to unsettled on 10 Mar as HSS conditions continue to diminish with enhancements possible due to the anticipated arrival of the 06 Mar CME. Mostly quiet conditions are expected on 11-12 Mar.