Routine Space Environment Product (Daily)
Issued by NWS
Issued by NWS
457 FXXX12 KWNP 200031 DAYDIS :Product: Forecast Discussion :Issued: 2026 Sep 20 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 reached low levels. The largest flare was a C3.3 flare at 19/1817 UTC from a source beyond the northeast limb. Early in the period B-flare activity was observed from an unnumbered region rotating into view on the southeast limb. New Region 4532 (S06W39, Axx/alpha) emerged with a rudimentary spot, but was otherwise unremarkable. No Earth-directed CMEs were detected in available coronagraph imagery. .Forecast... Solar activity is expected to be at very low levels on 20-22 Sep. Energetic Particle .24 hr Summary... The greater than 2 MeV electron flux was at normal to moderate levels. The greater than 10 MeV proton flux was steady at background levels. .Forecast... The greater than 2 MeV electron flux is likely to reach high levels on 20-22 Sep. The greater than 10 MeV proton flux is expected to continue at background levels through 22 Sep. Solar Wind .24 hr Summary... The solar wind environment remained undisturbed over the past 24 hours. Total field strength ranged between 3-7 nT, and the Bz component varied between +/-5 nT. Solar wind speeds ranged between 400-450 km/s throughout the period. The phi angle was negative. .Forecast... Ambient solar wind conditions are expected to prevail over 20-22 Sep. Geospace .24 hr Summary... The geomagnetic field was at quiet to unsettled levels. .Forecast... Mostly quiet geomagnetic field conditions are expected to prevail over 20-22 Sep.