Routine Space Environment Product Issued Weekly
Issued by NWS

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FXXX06 KWNP 140325
WEKHIL

:Product: 7-day Space Weather Highlights
:Issued: 2017 Aug 14 0316 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
#
#                7-day Space Weather Highlights
#
Highlights of Solar and Geomagnetic Activity
07 - 13 August 2017

Solar activity was very low. Region 2670 (S05, L=119, class/area
Cso/160 on 02 Aug) continued it transit across the visible disk
during the period as a simple Hsx/alpha spot group with no flaring
activity observed. 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
high levels from 07-11 Aug with a peak flux of 11,301 pfu observed
at 07/1440 UTC. Electron flux values decreased to normal to moderate
levels on 12-13 Aug due to the arrival of a negative polarity
coronal hole high speed stream (CH HSS).

Geomagnetic field activity ranged from quiet to unsettled levels
during the period. Solar wind speed was in decline at the beginning
of the period from a waning positive polarity CH HSS. Solar wind
speeds declined from near 570 km/s early in the period to nominal
levels by late on 08 Aug. Total field ranged from 2-6 nT through 10
Aug. On 11 Aug, total field and solar wind began to increase as a
negative polarity CH HSS became geoeffective. Total field increased
to a maximum of 12 nT at 12/0135 UTC while solar wind increased to
around 650 km/s by 13/1750 UTC. The geomagnetic field responded with
quiet levels from 07-10 Aug and quiet to unsettled levels from 11-12
Aug. Geomagnetic activity decreased to quiet levels again on 13 Aug.



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