:Issued: 2016 Dec 19 0057 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact www.swpc.noaa.gov/weekly.html
#
# Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity 12 - 18 December 2016
Solar activity was at background levels through the period.No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit reached high levels on 12-17 December and moderate levels on 18 December. A maximum flux of 10,187 pfu was observed at 14/1610 UTC.
Geomagnetic field activity was at quiet to unsettled levels during the period. The period began under the waning influence of a negative polarity CH HSS with unsettled conditions early on 12 December. The remainder of the 12th through late on 17 December saw quiet conditions. During this time, solar wind speeds slowly decreased from about 550 km/s to near 350 km/s. Bt was less than 5
nT while the Bz component varied generally between +5 nT to -4 nT. Phi angle was in a mostly negative orientation.
By midday on 17 December, winds speeds indicated a general increase to about 500 km/s while Bt increased to about 10 nT and Bz showed rotation from +6 nT to -7 nT. Phi angle rotated to a mostly positive orientation. This increase in wind parameters signaled the arrival of a co-rotating interaction region ahead of a weak, positive polarity CH HSS. The geomagnetic field reacted with quiet to
unsettled levels.
Forecast of Solar and Geomagnetic Activity 19 December - 14 January 2017
Solar activity is expected to be at very low levels with a slight chance for C-class flare activity throughout the outlook period. No proton events are expected at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit is expected to be at normal to moderate levels on 19 December and moderate to high levels for the remainder of the outlook period (20 Dec - 14 Jan).
Geomagnetic field activity is expected to be at unsettled to active levels on 19-25 December, 03-07 January and again on 14 January, with minor storm (G1-Minor) conditions likely on 21-22 December and 04-05 January; all due to recurrent CH HSSs. Mostly quiet conditions are expected for the remainder of the outlook period.
Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2016 Dec 19 0057 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact www.swpc.noaa.gov/wwire.html
#
# 27-day Space Weather Outlook Table
# Issued 2016-12-19
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2016 Dec 19 73 15 4
2016 Dec 20 73 15 4
2016 Dec 21 73 25 5
2016 Dec 22 75 28 5
2016 Dec 23 75 12 4
2016 Dec 24 75 12 4
2016 Dec 25 75 8 3
2016 Dec 26 75 5 2
2016 Dec 27 75 5 2
2016 Dec 28 77 5 2
2016 Dec 29 77 5 2
2016 Dec 30 77 5 2
2016 Dec 31 77 5 2
2017 Jan 01 79 5 2
2017 Jan 02 79 8 3
2017 Jan 03 79 10 3
2017 Jan 04 77 20 5
2017 Jan 05 77 22 5
2017 Jan 06 75 16 4
2017 Jan 07 75 14 4
2017 Jan 08 75 6 3
2017 Jan 09 75 5 2
2017 Jan 10 75 5 2
2017 Jan 11 77 5 2
2017 Jan 12 77 5 2
2017 Jan 13 75 5 2
2017 Jan 14 75 10 3
(NOAA)
