Space Weather Forecast - Discussion

Issued: 2025 Apr 28 1230 UTC
Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center and processed by SpaceWeatherLive.com

Solar activity

24 h Summary

Solar activity was at low levels. There are currently seven sunspot regions on the visible disk. Region 4070 (S13W33, Dai/beta) produced a C1.4/Sf flare at 27/1724 UTC. This region showed some slight intermediate spot growth. Region 4064 (N11W77, Dso/beta) produced a C2.1/Sf flare at 27/1849 UTC. Some decay has been evident in this region as it approached the west limb. Decayed Region 4069 (S09, L=034) produced a C2.2 at 28/0602 UTC. The remaining sunspot regions are all fairly simple and are either stable or in slight decay. 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) over 28-30 Apr.

Energetic Particles

24 h Summary

The greater than 2 MeV electron flux briefly reached high levels with a peak flux of 1,440 pfu observed at 27/1615 UTC. The greater than 10 MeV proton flux was at background levels.

Forecast

The greater than 2 MeV electron flux is likely to reach high levels over 28-30 Apr. The greater than 10 MeV proton flux is expected to continue at background levels.

Solar Wind

24 h Summary

Solar wind parameters remained slightly enhanced. Total magnetic field strength was between 5-7 nT. The Bz component briefly reached -6 nT but was oriented northward for the majority of the day. Solar wind speeds were between ~350-450 km/s. Phi angle was oriented in the positive sector.

Forecast

Solar wind parameters are expected to continue to be influenced by weak positive polarity CH HSS conditions through 29 Apr.

Geospace

24 h Summary

The geomagnetic field has been at quiet to unsettled levels.

Forecast

The geomagnetic field is expected to remain at mostly quiet to unsettled levels, with isolated active conditions likely on 28 Apr, due to influence from a positive polarity CH HSS. Over 29-30 Apr, mostly quiet conditions are expected as ambient solar wind conditions are likely to return.