Solar Report - 10/22/2019

By: Gordon Rutherford

:Product: Forecast Discussion
:Issued: 2019 Oct 23 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center #

Solar Wind (24 hr Summary)
Solar wind parameters were at background levels under a nominal solar
wind regime.  321 km/s

Background solar wind conditions are expected on 23 Oct as a nominal
solar wind regime persists. On 24 Oct, a CIR, ahead of an anticipated
positive polarity CH HSS, is expected to produce enhancements
in the solar wind environment that are expected to last into 25 Oct.

Geospace (24 hr Summary)
The geomagnetic field was quiet. NEGATIVE @ Earth-facing

The geomagnetic field is expected to remain generally quiet on 23 Oct
under a nominal solar wind regime. On 24 Oct, a positive polarity CH HSS
is expected to move into a geoeffective position, increasing activity to
mostly unsettled to active levels, with isolated G1 (minor) storm
periods likely. G1 (minor) storm conditions are likely to continue on 25

Oct as CH HSS influence persists.

Solar Activity (24 hr Summary)
Solar activity was very low. No Earth-directed CMEs were observed in
available satellite imagery.

Solar activity is expected to persist at very low levels on 23-25 Oct.

Energetic Particle (24 hr Summary)
The greater than 2 MeV electron flux was normal and the greater than 10
MeV proton flux was at background levels.

The greater than 2 MeV electron flux is expected to be at normal levels
on 23 Oct, increasing to normal to moderate levels on 24-25 Oct as a
positive polarity CH HSS moves into a geoeffective position. The greater
than 10 MeV proton flux is expected to continue at background levels
throughout the forecast period.

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