Routine Space Environment Product (Daily)
Issued by NWS
Issued by NWS
442 FXXX12 KWNP 231231 DAYDIS :Product: Forecast Discussion :Issued: 2025 Aug 23 1230 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 (R1-Minor) activity. The largest event was an M1.7 flare at 22/1851 UTC from a region just beyond the southeast limb. On the visible disk, Region 4191 (N11E50, Dho/beta) produced the majority of C-class flares and showed additional spot development. The remaining regions were stable. No Earth-directed CMEs were detected in coronagraph imagery. .Forecast... Solar activity is expected to be low, with an increasing chance for R1-R2 (Minor-Moderate) events through 25 Aug. Energetic Particle .24 hr Summary... The greater than 2 MeV electron flux was at normal to moderate levels. The greater than 10 MeV proton flux became enhanced following flare activity from the southeast limb, peaking near 1 pfu. .Forecast... The greater than 2 MeV electron flux is likely to reach high levels on 23-24 Aug, then return to normal to moderate levels on 25 Aug. There is a chance for the greater than 10 MeV proton flux to reach S1 (Minor) storm levels on 23 Aug, with a slight chance for S1 levels on 24 Aug. Solar Wind .24 hr Summary... Solar wind conditions were nominal. Total magnetic field strength ranged from 1-5 nT, with the Bz component fluctuating between +4/-3 nT. Solar wind speed gradually decreased from a peak near 575 km/s to around 465 km/s. The phi angle was predominately negative. .Forecast... Nominal solar wind conditions are expected to continue through 24 Aug. Enhanced conditions are likely on 25 Aug due to the influences of a negative polarity CH HSS. Geospace .24 hr Summary... The geomagnetic field was quiet to unsettled. .Forecast... The geomagnetic field is expected to remain mostly quiet on 23-24 Aug. Active periods are likely on 25 Aug due to the influence of a negative polarity CH HSS.