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FXXX06 KWNP 200625

:Product: 7-day Space Weather Highlights
: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
#                7-day Space Weather Highlights
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

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. is the U.S. government's official web portal to all federal, state and local government web resources and services.