Routine Space Environment Product (Daily)
Issued by NWS
Issued by NWS
869 FXXX12 KWNP 281231 DAYDIS :Product: Forecast Discussion :Issued: 2025 Jun 28 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 with a few weak C-class flares observed. Regions 4117 (S14W69, Dso/beta), 4120 (N06W59, Dao/beta), and 4121 (S12W38, Bxo/beta) were either stable or in slight decay. Region 4122 (N13E24) is the largest, but appears to be ceasing growth. All other regions were generally quiet. At least two new regions will likely be numbered later today. No Earth-directed CMEs were observed in available coronagraph imagery. .Forecast... A chance for R1-R2 (Minor-Moderate) radio blackouts due to isolated M-class flare activity will persist through 30 June. Energetic Particles .24 hr Summary... The greater than 2 MeV electron flux reached high levels at 27/1320 UTC when flux levels exceeded event threshold, and then fell slightly around 27/2200 UTC, before once again rising above threshold around 28/0500 UTC. The greater than 10 MeV proton flux was at background levels. .Forecast... The greater than 2 MeV electron flux will likely reach high levels intermittently through 30 June due to CH HSS effects. The greater than 10 MeV proton flux is expected to continue at background levels through 30 June. Solar Wind .24 hr Summary... Solar wind parameters reflected negative polarity CH HSS influence. Total field averaged 4-5 nT. The Bz component underwent several southward deflections reaching a maximum of -4 nT. Solar wind speeds averaged 700-725 km/s early, before decreasing to around 650 km/s during the second half of the period. The Phi angle was in a predominantly negative solar sector. .Forecast... An enhanced solar wind environment is expected to continue through 28 June under a negative polarity CH HSS regime before beginning to trend towards a more nominal environment on 29-30 June. Geospace .24 hr Summary... The geomagnetic field was mostly at quiet to unsettled levels. .Forecast... Unsettled to active conditions are expected on 28 June as HSS effects begin to wane with a return to primarily quiet to unsettled levels anticipated for 29 June. Mostly quiet conditions are expected on 30 June.