:Product: Forecast Discussion :Issued: 2023 Mar 29 0030 UTC # Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center # Solar Activity 24 hr Summary... Solar activity was at low levels. Region 3256 (S22W62, Fho/beta-gamma) increased in extent and area while producing the largest flare of the period (C2.3 at 28/1547 UTC). Regions 3262 (S19W08, Hsx/alpha) and 3265 (N19W30, Dso/beta) were also productive, producing isolated C-class flares. The other 6 regions were stable and inactive. No Earth-directed CMEs were observed in available coronagraph imagery. .Forecast... Solar activity is expected to be low with a slight chance for M-class flares (R1-R2, Minor-Moderate) through 31 Mar. Energetic Particles .24 hr Summary... The greater than 10 MeV proton flux was at background levels and the greater than 2 MeV electron flux reached high levels with a peak flux of 1,810 pfu observed at GOES-16 at 28/1420 UTC. .Forecast... The greater than 10 MeV proton flux is expected to continue at background levels through 31 Mar. The greater than 2 MeV electron flux is expected to reach high levels through 31 Mar, possibly decreasing to moderate levels on 30 Mar with the arrival of the next negative polarity CH HSS. Solar Wind .24 hr Summary... Solar wind parameters were mostly at background levels. The IMF was relaxed with total field averaging around 6 nT and Bz undergoing few if any significant southward deviations. Wind speeds were unreliable from DSCOVR given the low density environment, but ACE showed speeds generally at 400 km/s or less. The phi angle was oriented in a negative solar sector towards the Sun. .Forecast... Nominal levels are expected to continue through 29 Mar and the first half of 30 Mar. Another negative polarity CH HSS is forecast to arrive midday on 30 Mar, with elevated levels of activity lasting through 31 Mar. Geospace .24 hr Summary... The geomagnetic field was at quiet levels. .Forecast... Mostly quiet levels are expected on 29 Mar and the first half of 30 Mar. Active conditions are expected starting midday on 30 Mar through 31 Mar with the onset of a negative polarity CH HSS. There is also a chance for G1 (Minor) geomagnetic storms on 30-31 Mar with this activity.