Solar Activity

» 24 hr Summary: Solar activity was at low levels. Region 4114 (N20W71, Eso/beta-gamma) produced an impulsive C1.3 flare at 22/0315 UTC. The region continued to decay as it headed towards the W limb. Region 4118 (S13E29, Cso/beta) produced an impulsive C1.0 flare at 22/0602 UTC. Regions 4115 (N22W59, Cso/beta), 4117 (S15E18, Dsi/beta) and 4118 all exhibited minor development. No Earth-directed CMEs were observed in available coronagraph imagery.

» Forecast: R1-R2 (Minor-Moderate) radio blackouts remain likely, with a slight chance for X-class flares (R3-Strong), over 22-24 June.

Energetic Particle

» 24 hr Summary: The greater than 2 MeV electron flux was at low to moderate levels. The greater than 10 MeV proton flux was at background levels.

» Forecast: The greater than 2 MeV electron flux is likely to continue at low to moderate levels over 21-23 Jun. There remains a slight chance for protons to become elevated following any significant activity from multiple regions on the visible disk.

Solar Wind

» 24 hr Summary: Solar wind parameters continued to reflect a positive polarity CH HSS regime. Total magnetic field strength was between 6-10 nT. The Bz component reached as far south as -7 nT. Solar wind speeds varied from ~450-575 km/s. Phi angle was predominantly oriented in the positive sector.

» Forecast: Elevated solar wind parameters from the influence of a positive polarity coronal hole is likely to persist over 22-24 Jun.

Geospace

» 24 hr Summary: The geomagnetic field was at quiet to active levels.

» Forecast: Quiet to unsettled conditions are likely over 22 Jun due to continued coronal hole effects. Active conditions are possible over 23-24 Jun.


Prepared by:
The U.S. Dept. of Commerce, NOAA, SWPC