:Product: Forecast Discussion :Issued: 2026 Mar 25 0030 UTC # Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center # Solar Activity .24 hr Summary... Solar activity was at low levels during the reporting period. Aside from a single notable event, flaring remained below C-class thresholds. The largest flare of the period was a C7.2 at 24/1754 UTC from beyond the east limb. There are currently seven numbered sunspot groups on the visible disk, with the majority of these regions remaining stable or exhibiting signs of slight decay. Changes were notable in the disks most complex regions: Region 4401 (N25E38, Eai/beta-gamma) has rotated further into view and, alongside significant flux emergence, has revealed a gamma configuration. The trailing spots of Region 4400 (S14W52, Dao/beta) faded throughout the period and simplification around the leading spot led to loss of its delta configuration. No Earth directed CMEs were observed in available coronagraph imagery. .Forecast... Solar activity is expected to be low with a chance for M-class (R1-R2/Minor-Moderate) flares through 27 Mar. Energetic Particle .24 hr Summary... The greater than 2 MeV electron flux at at geosynchronous orbit reached high levels with a peak 11,906 pfu at 24/1605 UTC. The greater than 10 MeV proton flux persisted at nominal background levels with observed minor enhancements likely being the result of high-energy electron contamination in the instrument. .Forecast... The greater than 2 MeV electron flux is expected to continue to reach high levels through 27 Mar. The greater than 10 MeV proton flux is expected to continue at background levels. Solar Wind .24 hr Summary... Solar wind parameters reflected the continued waning of a negative polarity coronal hole high-speed stream (-CH HSS). Solar wind speed remained enhanced but trended downward throughout the period, decreasing from a peak near 650 km/s to approximately 550 km/s. The total magnetic field (Bt) averaged 4-5 nT. The North-South (Bz) component was predominantly southward and reached a maximum deflection of -5 nT. The phi angle was primarily in a negative (towards the Sun) orientation. .Forecast... Mildly enhanced solar wind parameters are expected to persist through 26 Mar as -CH HSS conditions continue to wane. By late on 26 Mar, additional enhancements are possible as a CME, which departed the Sun on 22 Mar, is forecast to pass in close proximity to Earth. A slow recovery toward nominal levels is anticipated on 27 Mar. Geospace .24 hr Summary... The geomagnetic field was at quiet to active levels under waning -CH HSS influences. .Forecast... The geomagnetic field is expected to be at quiet to unsettled levels, with isolated active levels possible on 25 Mar as negative polarity CH HSS influences continue to gradually diminish. The potential glancing impacts from the 22 Mar CME are expected to increase conditions back to unsettled to active levels late on 26 Mar. Activity levels are expected to stabilize at quiet to unsettled levels on 27 Mar as transient and coronal hole influences subside.