:Product: Weekly Highlights and Forecasts
:Issued: 2021 Dec 20 0238 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# https://www.swpc.noaa.gov/content/subscription-services
#
# Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity
13 - 19 December 2021
Solar activity ranged from very low to moderate levels throughout
the week. Very low activity levels (B-class flares) were observed on
13 Dec, with low levels (C-class flares) observed on 14-16, 18-19
Dec. Moderate solar activity was observed on 17 Dec due to an M1/1f
flare at 17/0051 UTC from Region 2911 (N19, L=273, class/area=Cao/80
on 17 Dec), which was the largest event of the period. In addition
to the single M-class flare, Region 2911 along with Regions 2907
(S19, L=315, class/area=Dki/310 on 18 Dec) and 2909 (S21, L=285,
class/area=Dso/210 on 17 Dec) were prolific C-class flare producers
throughout the week. A number of CMEs were observed off the SE
quadrant throughout the week, but no obvious transient solar wind
signatures were observed.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit reached
high levels on 13 Dec, with normal to moderate levels observed over
14-19 Dec.
Geomagnetic field activity reached G1 (Minor) geomagnetic storm
levels on 19 Dec due to what was thought to be CIR effects preceding
negative polarity CH HSS influence. Quiet to unsettled conditions
were observed on 13 and 15-16 Dec and quiet conditions were observed
throughout the remainder of the week.
Forecast of Solar and Geomagnetic Activity
20 December - 15 January 2022
Solar activity is expected to very low to low throughout the outlook
period, with a slight chance for isolated R1-R2 (Minor-Moderate)
radio blackout conditions.
No proton events are expected at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit is
expected to reach high levels on 22-24 Dec and 29 Dec-01 Jan. Normal
to moderate flux levels are expected to prevail throughout the
remainder of the outlook period.
Geomagnetic field activity is expected to reach G1 (Minor)
geomagnetic storm levels early on 20 Dec due to what is thought to
be the effects of a CIR preceding negative polarity CH HSS
influence. Active conditions are expected on 21-22, and 28 Dec due
to the anticipated influences of multiple recurrent CH HSSs. Quiet
or quiet to unsettled conditions are expected to prevail throughout
the remainder of the forecast period.
:Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2021 Dec 20 0238 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# https://www.swpc.noaa.gov/content/subscription-services
#
# 27-day Space Weather Outlook Table
# Issued 2021-12-20
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2021 Dec 20 115 12 4
2021 Dec 21 115 16 4
2021 Dec 22 114 12 4
2021 Dec 23 111 8 3
2021 Dec 24 110 5 2
2021 Dec 25 108 5 2
2021 Dec 26 102 5 2
2021 Dec 27 95 10 3
2021 Dec 28 90 15 4
2021 Dec 29 88 10 3
2021 Dec 30 87 8 3
2021 Dec 31 85 8 3
2022 Jan 01 83 5 2
2022 Jan 02 81 5 2
2022 Jan 03 80 5 2
2022 Jan 04 81 5 2
2022 Jan 05 82 5 2
2022 Jan 06 82 5 2
2022 Jan 07 83 5 2
2022 Jan 08 86 5 2
2022 Jan 09 90 5 2
2022 Jan 10 92 5 2
2022 Jan 11 95 10 3
2022 Jan 12 95 10 3
2022 Jan 13 96 5 2
2022 Jan 14 96 5 2
2022 Jan 15 96 8 3
