Space Weather Forecast - Discussion
Issued: 2017 Oct 17 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 remained very low. No Earth-directed CMEs were observed
in available coronagraph imagery.
Forecast
Solar activity is expected to continue at very low levels the next three
days (17-19 Oct).
Energetic Particles
24 h Summary
The greater than 2 MeV electron flux reached very high levels. The
greater than 10 MeV proton flux remained at background values.
Forecast
The greater than 2 MeV electron flux is expected to be at high levels
all three days (17-19 Oct) due to CH HSS influences. The greater than 10
MeV proton flux is expected to remain at background levels all three
days.
Solar Wind
24 h Summary
Solar wind parameters continued to reflect weakening influence of a CH
HSS. Total magnetic field strength ranged from 2-4 nT; no significant
periods of southward Bz were observed. Solar wind speeds gradually
declined from speeds near 530 km/s to near 460 km/s by the periods end.
Phi angle was predominantly positive.
Forecast
Solar wind parameters are expected to remain slightly elevated early
on day one (17 Oct) with decreasing strength of the CH HSS. Solar wind
parameters are likely to undergo an additional enhancement late on day
two and three (18-19 Oct)as a second positive polarity CH HSS becomes
geoeffective.
Geospace
24 h Summary
The geomagnetic field was quiet to unsettled.
Forecast
The geomagnetic field is expected to be at mostly unsettled levels on
day one (17 Oct) as CH HSS effects continue to wane. Active conditions
are likely to return late on days two and three (18-19 Oct) due to the
onset of another positive polarity CH HSS.
