Routine Space Environment Product (Daily)
Issued by NWS
Issued by NWS
415 FXXX12 KWNP 310031 DAYDIS :Product: Forecast Discussion :Issued: 2026 Oct 31 0030 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 very low levels. Newly numbered Region 4564 (N12E75, Hsx/alpha) rotated around the E limb with no apparent trailer spot. It was mostly quiet and stable. No Earth-directed CMEs were observed at the available coronagraph imagery. .Forecast... Solar activity is expected to be at very low levels with a slight chance for isolated C-class flares through 02 Nov. Energetic Particle .24 hr Summary... The greater than 2 MeV electron flux reached high levels, with a peak flux of 4,488 pfu observed at 30/1430 UTC. The greater than 10 MeV proton flux remained steady at background levels. .Forecast... The greater than 2 MeV electron flux is expected to decrease to normal to moderate levels on 31 Oct Oct and remain there through 02 Nov. The greater than 10 MeV proton flux is anticipated to persist at background levels through 02 Nov. Solar Wind .24 hr Summary... Solar wind parameters suggested mild influence from a solar sector boundary crossing. Total magnetic field strength reached a peak of 9 nT and the Bz component reached as far south as -8 nT. Solar wind speeds remained low, with values observed between 307-354 km/s. Phi angle transitioned from mostly negative to positive after 30/0513 UTC. .Forecast... Solar wind disturbances are likely to be observed on 31 Oct and slow wane through 02 Nov, due to the anticipated arrival of a recurrent, equatorial, positive polarity CH HSS. Geospace .24 hr Summary... The geomagnetic field was at quiet to active levels during the period. .Forecast... The geomagnetic field is expected to reach G1 (Minor) geomagnetic storm levels on 31 Oct - 01 Nov due to influence from a positive polarity CH HSS. Unsettled conditions are likely on 02 Nov as CH HSS influence wanes.