:Product: Forecast Discussion
:Issued: 2019 Aug 19 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
Solar Activity

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

.Forecast...
Solar activity is expected to remain very low on 19-21 Aug.

Energetic Particle

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

.Forecast...
The greater than 2 MeV electron flux is expected to be at normal to
moderate levels on 19-21 Aug. The greater than 10 MeV proton flux is
expected to remain at background levels.

Solar Wind

.24 hr Summary...
Solar wind parameters, as measured by the DSCOVR spacecraft, reflected
minor enhancements early in the period as the phi angle transitioned
from positive to variable. Total magnetic field strength peaked at 9 nT
around 18/0605 UTC but decreased and maintained below 5 nT shortly
after. Wind speeds remained low and varied around 330-375 km/s.

.Forecast...
Nominal solar wind conditions are expected over 19 Aug. Weak
enhancements are possible on 20-21 Aug due to potential interaction with
a negative polarity CH HSS.

Geospace

.24 hr Summary...
The geomagnetic field was mostly quiet with an isolated unsettled period
early on 18 Aug.

.Forecast...
The geomagnetic field is expected to be mostly quiet over 19 Aug.
Isolated periods of unsettled levels are possible on 20-21 Aug due to
influence from a negative polarity coronal hole.