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FXXX06 KWNP 230626
WEKHIL

:Product: 7-day Space Weather Highlights
:Issued: 2015 Feb 23 0555 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 February 2015

Solar activity began the period with very low levels on 16-17
February with a few B-class flares observed from Region 2282 (N11,
L-187, class/area Eho/250 on 11 Feb). Activity increased to low
levels on 18-21 February with weak C-class flares observed from
Regions 2282 and 2286 (S18, L=193, class/area Cao/030 on 18 Feb).
During this time frame, the largest events were a C3/Sf flare at
18/2207 UTC from Region 2282 and a long duration C2 x-ray event on
20/1522 UTC from departed Region 2286. By 22 February, activity
declined to very low levels. During the period, no Earth-directed
CMEs were observed.

No proton events were observed at geosynchronous orbit. However, a
greater than 10 MeV proton enhancement was observed beginning midday
on 21 February and remained enhanced through period's end. Peak
flux reached 1.3 pfu at 21/1925 UTC. The enhancement was due to
effects from a large CME whose origin was a large filament eruption
located backside in the south central portion of the disk.

The greater than 2 MeV electron flux at geosynchronous orbit was at
moderate levels on 16, 19-21 February and normal levels on 17-18 and
22 February.

Geomagnetic field activity was generally quiet to unsettled
throughout the week with periods of active to isolated minor storm
periods on 17-18 February. This activity was due to high speed winds
from a negative polarity, trans-equatorial coronal hole. Solar wind
speeds were mostly nominal through the period at 325-350 km/s but
reached a peak of about 485 km/s early on 18 February. IMF total
field averaged about 5 nT with a maximum of 16 nT observed early on
17 February. The Bz component did not vary much beyond +/- 5 nT for
a majority of the period. However, during the coronal hole
influence, Bz ranged from +14 to -12 nT. Phi was in a predominately
negative (towards) orientation throughout the period.


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