:Product: Weekly Highlights and Forecasts
:Issued: 2017 Nov 20 0558 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# http://www.swpc.noaa.gov/weekly.html
#
# Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity 13 - 19 November 2017
Solar activity was at very low levels throughout the period. Several
B-class flares were observed from Region 2687 (S08, L=180,
class/area Cao/090 on 16 Nov). The largest was a B7 flare at 13/0648
UTC. No Earth-directed coronal mass ejections were observed.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit reached
moderate levels on 16 Nov and high levels on 13-15 and 17-19 Nov.
The largest flux of the period was 20,582 pfu observed at 13/1455
UTC.
Geomagnetic field activity ranged from quiet to active levels. The
period began with solar wind speed between 370-430 km/s and total
field between 2-9 nT. A prolonged period of -Bz reaching -7 nT was
observed between 14/1322-2256 UTC. The geomagnetic field responded
with quiet levels on 13 Nov and quiet to unsettled levels on 14 Nov.
By 15 Nov, total field increased to a maximum of 15 nT at 15/1858
UTC while the Bz component deflected southward to a maximum of -9 nT
at 16/0100 UTC. Solar wind speed increased to around 520 km/s late
on 15 Nov through 16 Nov as a positive polarity coronal hole high
speed stream (CH HSS) became geoeffective. By 16/0900 UTC, total
field decreased to 5 nT while solar wind speed began decreasing
early on 17 Nov. The period ended at nominal levels with solar wind
speed near 380 km/s. The geomagnetic field responded with quiet to
active levels on 15-16 Nov, quiet to unsettled levels on 17 and 19
Nov, and quiet levels on 18 Nov.
FORECAST OF SOLAR & GEOMAGNETIC ACTIVITY 20 NOVEMBER-16 DECEMBER 2017
Solar activity is expected to be at very low levels throughout the
period.
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 22-25 Nov, 05-10 Dec and 12-16 Dec
due to recurrent CH HSS influences.
Geomagnetic field activity is expected to be at unsettled to active
levels on 20-23 Nov, 29-30 Nov, 04-08 Dec and 11-14 Dec with G1
(Minor) geomagnetic storm levels likely on 04-07 Dec and G2
(Moderate) levels likely on 04-05 Dec due to recurrent CH HSS
effects.
:Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2017 Nov 20 0559 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# http://www.swpc.noaa.gov/wwire.html
#
# 27-day Space Weather Outlook Table
# Issued 2017-11-20
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2017 Nov 20 75 18 4
2017 Nov 21 75 18 4
2017 Nov 22 75 15 4
2017 Nov 23 75 8 3
2017 Nov 24 75 5 2
2017 Nov 25 75 5 2
2017 Nov 26 75 5 2
2017 Nov 27 73 5 2
2017 Nov 28 72 5 2
2017 Nov 29 71 8 3
2017 Nov 30 70 10 3
2017 Dec 01 70 5 2
2017 Dec 02 70 5 2
2017 Dec 03 69 5 2
2017 Dec 04 68 35 6
2017 Dec 05 69 40 6
2017 Dec 06 70 28 5
2017 Dec 07 70 20 5
2017 Dec 08 71 10 3
2017 Dec 09 72 5 2
2017 Dec 10 72 5 2
2017 Dec 11 73 12 4
2017 Dec 12 73 15 4
2017 Dec 13 74 12 4
2017 Dec 14 75 8 3
2017 Dec 15 75 5 2
2017 Dec 16 75 5 2
(SWPC via DXLD)
