Routine Space Environment Product Issued Weekly
Issued by NWS

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FXXX06 KWNP 230425
WEKHIL

:Product: 7-day Space Weather Highlights
:Issued: 2016 May 23 0405 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
16 - 22 May 2016

Solar activity was low with only B-class and C-class flare activity
observed. Regions 2544 (N20, L=295, class/area=Dai/160 on 16 May)
and 2546 (S07, L=223, class/area=Cho/550 on 21 May) produced three
low-level C-class flares between them, with the largest being a C1.8
at 16/1525 UTC from Region 2544. No Earth-directed coronal mass
ejections (CME) were observed during the reporting period.

No proton events were observed at geosynchronous orbit. However,
there was a slight enhancement on 16 May from a long duration C3
flare that occured previous to the reporting period. The greater
than 10 MeV proton flux reached a maximum of 1 pfu at 16/0030 UTC.

The greater than 2 MeV electron flux at geosynchronous orbit reached
high levels on 16, 17, and 19 May and moderate levels on 18, 20-22
May.

Geomagnetic field activity was mostly at quiet to unsettled levels
from 16-20 May with an isolated period of active conditions on 17
May in response to a positive polarity coronal hole high speed
stream (CH HSS). G1 (Minor) geomagnetic storm levels were observed
during the 0600-0900 UTC synoptic period on 21 May due to influences
from another positive polarity CH HSS.



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