:Product: Forecast Discussion
:Issued: 2021 Apr 11 1230 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
Solar Activity

.24 hr Summary...
Solar activity was very low. A region of emerging flux produced some
pores in the SE quadrant. A slow-moving CME signature was observed in
STEREO-A COR 2 imagery beginning ~10/0600 UTC. Analysis determined the
CME to not be Earth-directed.

.Forecast...
Solar activity is expected to be very low on 11-13 Apr.

Energetic Particle

.24 hr Summary...
The greater than 2 MeV electron flux was at normal to moderate levels
and the greater than 10 MeV proton flux was at background values.

.Forecast...
The greater than 2 MeV electron flux is expected to be at normal to
moderate levels on 11-13 Apr. The greater than 10 MeV proton flux is
expected to continue at background levels for 11-13 Apr.

Solar Wind

.24 hr Summary...
Solar wind parameters, as measured by the DSCOVR spacecraft, reflected
nominal conditions. Total magnetic field strength was at or below 5 nT.
No significant periods of southward Bz were observed. Solar wind speeds
were between ~330-360 km/s. Phi angle switched from positive to negative
near 11/0300 UTC.

.Forecast...
Solar wind parameters may become slightly enhanced on 11 Apr due to
connection with a negative polarity CH HSS from a coronal hole that was
decaying as it crossed the Suns central meridian. A return to mostly
nominal levels is expected over 12-13 Apr.

Geospace

.24 hr Summary...
The geomagnetic field was quiet.

.Forecast...
The geomagnetic field is likely to be at quiet to unsettled intervals on
11 Apr due to weak, negative polarity HSS effects. Quiet conditions are
expected on 12-13 Apr.