Routine Space Environment Product Issued Weekly
Issued by NWS

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FXXX06 KWNP 220255
WEKHIL

:Product: 7-day Space Weather Highlights
:Issued: 2017 May 22 0235 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
15 - 21 May 2017

Solar activity was very low throughout the reporting period. Region
2659 (N14, L=038, class/area=Dao/040 on 21 May 2017) was the most
complex region; however, it has produced no significant flare
activity. No Earth-directed CMEs were observed in available
coronagraph imagery.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit ranged
from normal to high levels, with a peak flux of 13,000 pfu at
21/1710 UTC. Normal levels were observed on 15 May and moderate
levels were observed on 16-19 May. In response to a negative
polarity CH HSS, high levels were observed on 20-21 May.

Geomagnetic field activity was at quiet to active levels. Quiet to
active levels were observed on 15 May. Conditions decreased to quiet
to unsettled levels on 16-17 May under nominal solar wind
conditions. A SSBC produced quiet to active levels on 18 May and
quiet to unsettled levels on 19 May. The subsequent onset of a
negative polarity CH HSS, with peak observed winds between 700-750
km/s, produced unsettled to active conditions on 20 May and quiet to
unsettled levels on 21 May.



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