Routine Space Environment Product (Daily)
Issued by NWS
Issued by NWS
157 FXXX12 KWNP 261231 DAYDIS :Product: Forecast Discussion :Issued: 2025 Jun 26 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 was at low levels. A C1.3 flare was observed at 25/2112 UTC from Region 4120 (N06W31, Dai/beta-gamma), which was the largest event of the period. Regions 4117 (S14W38, Dso/beta) and 4118 (S12W27, Cai/beta) continued to exhibit decay and were relatively quiet. Region 4122 (N13E48, Bxi/beta) was stable and managed a C1 flare. Region 4120 underwent evolution gaining asymmetric penumbra on its leading spots and developed a gamma magnetic configuration. No Earth-directed CMEs were observed in available coronagraph imagery. .Forecast... A chance for R1-R2 (Minor-Moderate) radio blackouts, with a slight chance for X-class flares (R3-Strong), will persist through 28 June. Energetic Particle .24 hr Summary... The greater than 2 MeV electron flux reached high levels with a peak flux of 1,260 pfu at 25/1355 UTC. The greater than 10 MeV proton flux was at background levels. .Forecast... The greater than 2 MeV electron flux is expected to reach moderate levels through 26 June before likely returning to high levels on 27 and 28 June due to CH HSS effects. The greater than 10 MeV proton flux is expected to continue at background levels through 28 June. Solar Wind .24 hr Summary... Solar wind parameters reflected negative polarity CH HSS onset. Total field was elevated between 10-16 nT. The Bz component underwent several deflections at near +/- 10 nT. Solar wind speeds gradually increased from ~420 to ~660 km/s. Phi was predominantly in the negative solar sector. .Forecast... An enhanced solar wind environment is expected to continue through 27 June under a negative polarity CH HSS regime before beginning to trend towards a more nominal environment on 28 June. Geospace .24 hr Summary... The geomagnetic field was at quiet to active levels. .Forecast... G1 (Minor) geomagnetic storming is likely, with a chance for an isolated G2 (Moderate) storming period, on 26-27 June due to negative polarity CH HSS effects. Unsettled to active levels are expected on 28 June as negative polarity CH HSS effects begin to diminish.