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FXXX06 KWNP 270656
WEKHIL

:Product: 7-day Space Weather Highlights
:Issued: 2014 Oct 27 0638 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
20 - 26 October 2014

Solar activity was at moderate levels on 21 and 23 October with high
levels the rest of the period due in large part to flare activity
associated with Region 2192 (S12, L=248, class/area Fkc/2750 on 26
October). Region 2192 began producing M-class flare activity before
it rotated onto the visible disk late on 16 October. By the time the
region was fully apparent on 18 October, it was already classified
as an Fkc spot group with an area of 1240 millionths. The region
continued to grow and spread as it transited across the disk
culminating in an area near 2570 millionths by 26 October (the
fourth largest region since March of 1989), all the while
maintaining a complex beta-gamma-delta magnetic configuration. This
region managed to produce a total of 58 C-class flares, 18 M-class
flares, and 5 X-class flares as of the end of the reporting period.
The largest of these flares were an X1/2b at 22/1428 UTC, a long
duration X3/3b at 24/2141 UTC, a long duration X1/3b at 25/1708 UTC,
and an X2/2b at 26/1056 UTC. Although these were significant flares
in the X-ray trace, there were no Type II or Type IV radio sweeps
associated or Earth-directed coronal mass ejections.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at
moderate levels on 20 October and reached high levels for the rest
of the reporting period. The highest reported value was 11,815 pfu
at 22/1735 UTC.

Geomagnetic field activity ranged from quiet to minor storm levels
with major storm levels reported at high latitudes. The period began
under the onset of a positive polarity coronal hole high speed
stream (CH HSS). Solar wind speeds increased from approximately 430
km/s to around 660 km/s by mid-day on 21 October before beginning a
slow decline. Total field was initially elevated near 10 nT on 20
October before slightly decreasing while the Bz component fluctuated
between +/- 8 nT. From late on 22 October through the end of the
period, solar wind speeds slowly decreased from the upper 400 km/s
range back to nominal solar wind conditions. The geomagnetic field
responded with unsettled to minor storm levels on 20 October with
major storm levels observed at high latitudes. From 21-24 October,
quiet to unsettled conditions with isolated active periods
prevailed. By 25-26 October, geomagnetic field activity had
decreased to quiet to unsettled levels.



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