Routine Space Environment Product (Daily)
Issued by NWS
Issued by NWS
409 FXXX12 KWNP 251231 DAYDIS :Product: Forecast Discussion :Issued: 2026 Sep 25 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 continued at low levels with two C-class flares: a C1.1 flare at 25/0244 UTC from Region 4536 (N03W53, Dac/beta-delta) and a C1.2 at 25/0816 UTC beyond the west limb. Eight numbered sunspot regions are present on the visible disk. Region 4536 was the only one to exhibit growth and new flux emergence. All other regions were stable or in a state of decay. No Earth-directed CMEs were observed. .Forecast... Solar activity is likely to continue at low levels with isolated to occasional C-class flare activity, along with a slight chance for R1-R2 (Minor-Moderate) M-class flare events, through 27 Sep. 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 remained steady at background levels. .Forecast... The greater than 2 MeV electron flux is expected to reach above 1,000 pfu in geosynchronous orbit (high levels) beginning on 25-27 Sep. The greater than 10 MeV proton flux is expected to persist at background levels through 27 Sep. Solar Wind .24 hr Summary... Solar wind parameters reflected CH HSS influences. Total magnetic field strength (Bt) ranged between 07 and 11 nT. The North-South (Bz) component was variable but largely in a southward/negative orientation, with maximum deflections of -8 nT at 24/1410 UTC and again at 25/0749 UTC. Solar wind speeds gradually increased, rising from early values near 375 km/s to 450 km/s by the end of the period, with a max of 471 km/s at 25/0815 UTC. The phi angle was predominantly positive (away from the Sun) sector. .Forecast... Slightly enhanced conditions are expected to persist into 26 Sep before beginning to slowly wane through 27 Sep. Geospace .24 hr Summary... The geomagnetic field was at largely unsettled to active levels, with an isolated quiet period. .Forecast... The geomagnetic field is expected to reach active levels through 26 Sep, before decreasing to largely unsettled levels on 27 Sep.