Routine Space Environment Product (Daily)
Issued by NWS
Issued by NWS
113 FXXX12 KWNP 250031 DAYDIS :Product: Forecast Discussion :Issued: 2025 Aug 25 0030 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # http://www.swpc.noaa.gov/wwire.html # # Forecast Discussion # Solar Activity .24 hr Summary... Solar activity reached moderate levels due to M-class flare activity (R1-Minor). An M1.3 flare was observed at 24/0836 UTC that originated from beyond the NE limb. This was the strongest event of the period. Region 4191 (N11E29, Ehi/beta-gamma) produced the largest flare on the visible disk, a C4.8 at 24/0054 UTC. The region increased in size and spot count. Numerous C-class activity was also observed from regions beyond the NE and SE limbs. New Regions 4196 (S11E64, Axx/alpha) and 4197 (S17E66, Dao/beta) were numbered this period. The remaining regions were stable and quiet. No Earth-directed CMEs were detected in coronagraph imagery. .Forecast... Solar activity is expected to be low, with a chance for R1-R2 (Minor-Moderate) events through 27 Aug. Energetic Particle .24 hr Summary... The greater than 2 MeV electron flux reached high levels. The greater than 10 MeV proton flux remained enhanced following flare activity from beyond the east limb, reaching a peak flux of just over 8 pfu at 24/2330 UTC. .Forecast... The greater than 2 MeV electron flux is expected to reach high levels on 25-27 Aug. The greater than 10 MeV proton flux is expected to reach S1 (Minor) storm levels on 25 Aug. Solar Wind .24 hr Summary... Solar wind conditions were nominal. Total magnetic field strength ranged from 4-6 nT, but peaked at 9 nT late in the period. The Bz component fluctuated between +/-5 nT. Solar wind speed gradually decreased from a peak near 455 km/s to around 375-400 km/s. The phi angle was predominately negative. .Forecast... Enhanced solar wind conditions are likely on 25-27 Aug due to the influences of a negative polarity CH HSS. Geospace .24 hr Summary... The geomagnetic field was quiet. .Forecast... The geomagnetic field is expected to reach active periods on 25-26 Aug due to the influence of a negative polarity CH HSS. Quiet to unsettled levels are likely on 27 Aug as CH HSS influence wanes.