Routine Space Environment Product (Daily)
Issued by NWS
Issued by NWS
477 FXXX12 KWNP 191231 DAYDIS :Product: Forecast Discussion :Issued: 2026 Jul 19 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 remained at low levels this period. The largest flare was a C1.5 at 18/2152 UTC from newly numbered Region 4492 (N15E73, Hax/alpha), which rotated onto the eastern limb this period. Region 4489 (S07W12, Cso/beta-gamma) developed some small trailing spots, but Region 4491 (S11E21, Axx/alpha) lost its penumbra. No Earth-directed CMEs were observed in available coronagraph imagery. .Forecast... Solar activity is likely to reach low levels on 19-21 Jul, with a slight chance for M-class flare activity. Energetic Particle .24 hr Summary... The greater than 2 MeV electron flux reached high levels this period with a peak flux of 1,170 pfu at 18/1715 UTC. The greater than 10 MeV proton flux was steady at background levels. .Forecast... The greater than 2 MeV electron flux is expected to reach high levels on 19-21 Jul. The greater than 10 MeV proton flux is expected to continue at background levels through 21 Jul. Solar Wind .24 hr Summary... Solar wind parameters continued at background levels. Total magnetic field strength reached 5 nT, and the Bz component ranged between +/- 4 nT. Solar wind speeds average around 325 km/s throughout the period. .Forecast... Background solar wind conditions are expected to prevail over 19-21 Jul. Geospace .24 hr Summary... The geomagnetic field was quiet under an ambient solar wind environment. .Forecast... The geomagnetic field is expected to persist at quiet levels over 19-21 Jul.