Routine Space Environment Product (Daily)
Issued by NWS
Issued by NWS
388 FXXX12 KWNP 291231 DAYDIS :Product: Forecast Discussion :Issued: 2026 Oct 29 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 very low levels. Region 4563 (S19W76, Bxo/beta) remained relatively stable and quiet. A filament in the southwest quadrant started erupting around 29/0830 UTC in GOES/SUVI 304 imagery. Analysis and modeling are currently ongoing, waiting on sufficient coronagraph imagery. .Forecast... Solar activity is expected to be at very low levels with a slight chance for isolated C-class flares through 31 Oct. Energetic Particle .24 hr Summary... The greater than 2 MeV electron flux reached high levels, with a peak flux of 2,490 pfu observed at 28/1805 UTC. The greater than 10 MeV proton flux remained steady at background levels. .Forecast... The greater than 2 MeV electron flux is expected to continue at high levels on 29 Oct before decreasing to normal to moderate levels by late on 30 Oct and remaining there through 31 Oct. The greater than 10 MeV proton flux is anticipated to persist at background levels through 31 Oct. Solar Wind .24 hr Summary... Solar wind parameters were on a downward trend to background levels. Total magnetic field (Bt) gradually decreased from 7 nT to 4 nT by the end of the period, with a Bz (north-south) component that was mostly near neutral or northward. Solar wind speeds decreased from roughly 400 km/s to end the period around 330 km/s. The phi angle was largely negative (towards the Sun). .Forecast... Mostly ambient-like solar wind conditions are anticipated for 29 Oct. Enhancements from a recurrent, equatorial positive polarity CH HSS are likely by late on 30 Oct, continuing into 31 Oct. Geospace .24 hr Summary... The geomagnetic field was quiet. .Forecast... Quiet levels are expected through the remainder of 29 Oct. Unsettled to active levels are expected by late on 30 Oct as CH HSS effects begin, with G1 (Minor) geomagnetic storming becoming likely on 31 Oct.