:Product: Forecast Discussion
:Issued: 2021 Dec 09 1230 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
Solar Activity

.24 hr Summary...
Solar activity was at very low levels with a spotless solar disk. No
Earth-directed CMEs were observed in available coronagraph imagery.

.Forecast...
Solar activity is expected to be very low through 11 Dec.

Energetic Particle

.24 hr Summary...
The greater than 2 MeV electron flux reached moderate levels. The
greater than 10 MeV proton flux maintained background levels.

.Forecast...
The greater than 2 MeV electron flux is expected to be at moderate
levels through 11 Dec. The greater than 10 MeV proton flux is expected
to continue at background levels.

Solar Wind

.24 hr Summary...
The solar wind environment returned to ambient-like, background
conditions. Total field strength ranged from 2-4 nT, and the Bz
component was unremarkable. Wind speeds decreased from near 450 km/s to
~350 km/s by the end of the period. The phi angle was predominantly in a
positive solar sector.

.Forecast...
Minor enhancements are expected from a CME that will be passing mostly
south of Earth on 10-11 Dec.

Geospace

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

.Forecast...
Mostly quiet levels are expected through 09 Dec. Unsettled and active
levels become more likely on 10-11 Dec with a CME that will be passing
close to Earth.