Routine Space Environment Product (Daily)
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FXXX12 KWNP 201230

:Product: Forecast Discussion
:Issued: 2017 Jul 20 1230 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
#             Forecast Discussion
Solar Activity

.24 hr Summary...
Solar activity was low as Region 2665 (S06, L=118) produced a C1 flare
at 20/0001 UTC. No numbered regions are currently on the visible disk.
No Earth-directed CMEs were observed in available coronagraph imagery.

Solar activity is expected to be very low on days one through three
(20-22 Jul).

Energetic Particle

.24 hr Summary...
The greater than 2 MeV reached high levels this period with a peak level
of 13630 pfu. The greater than 10 MeV proton flux was at or near
background levels this period.

The greater than 2 MeV electron flux is expected to reach high levels
over the next three days (20-22 Jul). The greater than 10 MeV proton
flux is forecast to be at or near background levels for days one through
three (20-22 Jul).

Solar Wind

.24 hr Summary...
Solar wind parameters were at nominal levels. Solar wind speeds averaged
near 380 km/s. Total field strength was between 1 and 7 nT while the Bz
component was mostly northward. The phi angle switched between negative
and positive throughout the period, ending in a positive orientation.

Solar wind parameters are expected to show a return to background levels
for days one and the first half of day two (20-21 Jul). An increase in
solar wind activity is forecast for the second half of day two and into
day three (22 Jul), with increases in solar wind velocity, temperature,
and magnetic field, as a recurrent +CH HSS is forecast to become


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

The geomagnetic field is forecast to be quiet on day one (20 Jul). Quiet
to unsettled conditions are forecast for day two (21 Jul), followed by
unsettled to active conditions on day three (22 Jul) as CH HSS effects
are anticipated. is the U.S. government's official web portal to all federal, state and local government web resources and services.