Routine Space Environment Product Issued Weekly
Issued by NWS

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FXXX06 KWNP 220255

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