Routine Space Environment Product (Daily)
Issued by NWS
Issued by NWS
729 FXXX12 KWNP 251231 DAYDIS :Product: Forecast Discussion :Issued: 2025 Jul 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 was at low levels. A C8.1/Sf flare, that originated from beyond the western limb, occurred at 24/0545 UTC. This was the largest event of the period. Region 4149 (N17E02, Ehi/beta-gamma) reformed a gamma magnetic configuration in its trailing spots while producing C-class flares to include a C5.7 flare at 24/1839 UTC. Region 4153 (S28E32, Eai/beta-gamma) continued to grow and developed a weak gamma magnetic configuration in its intermediate spots, but remained relatively quiet. Notable CMEs were observed off the southwest and west limbs in LASCO C2 imagery beginning at 24/0624 UTC and 24/1612 UTC, respectively. However, given the source locations, no Earth-directed components are expected. .Forecast... Solar activity is expected to be low with a chance for M-class flares (R1-R2/Minor-Moderate) and a slight chance for an isolated X-class flare (R3/Strong) through 27 July. Energetic Particle .24 hr Summary... The greater than 2 MeV electron reached high levels with a peak flux of 2,294 pfu at 24/1600 UTC. The greater than 10 MeV proton flux was steady at background levels throughout the period. .Forecast... The greater than 2 MeV electron flux is expected to continue at high levels through 27 July. The greater than 10 MeV proton flux is expected to remain at background levels though 27 July. Solar Wind .24 hr Summary... The solar wind environment reflected waning negative polarity CH HSS influences. Total field averaged 4-6 nT and the Bz component was mostly variable at +/- 5 nT. Solar wind speeds gradually decreased from near 700 km/s to near 600 km/s. The phi angle was in a predominately negative orientation. .Forecast... Enhanced, but waning, solar wind conditions due to negative polarity CH HSS influences are expected to continue through 25 July. A return to a more ambient-like environment is anticipated for 26 July. An additional disturbance is likely on 27 July due to CME arrival from an event that left the Sun on 23 July. Geospace .24 hr Summary... The geomagnetic field was at quiet to active levels. .Forecast... Unsettled to active conditions are expected on 25 July, particularly in the early hours, as negative polarity CH HSS effects continue. A return to mostly quiet conditions is expected on 26 July. G1 (Minor) geomagnetic storming is likely on 27 July, with a chance for isolated G2 (Moderate) periods due to CME effects from an event that left the Sun on 23 July.`