Routine Space Environment Product Issued Weekly
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FXXX06 KWNP 240726

:Product: 7-day Space Weather Highlights
:Issued: 2016 Oct 24 0702 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
17 - 23 October 2016

Solar activity was very low to low with a single C-class flare
observed on 17 Oct. At 17/0038 UTC, a C4 flare was observed from
Region 2599 (S15, L=144, class/area Cko/460 on 05 Oct) which had
rotated around the southwest limb on 15 Oct. A nine degree long
filament, centered near N26W02, was observed erupting in SDO/AIA 304
and GONG imagery at about 20/1300 UTC. A slow-moving, faint CME was
observed in LASCO C2 imagery with possible effects observed on 23

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit ranged
from normal to very high levels. On 18 Oct very high levels were
observed, with a peak level of 52,137 pfu. High levels were observed
on 17 Oct and 19-22 Oct. Normal to high levels were observed on 23

Geomagnetic field activity during the reporting period ranged from
quiet to active levels. Quiet to active conditions were observed on
17 Oct and tapered into quiet to unsettled levels through 19 Oct due
to the waning effects of a CH HSS. Quiet conditions were observed
from 20-22 Oct under an ambient solar wind regime. Quiet to
unsettled conditions were noted 23-24 Oct due to a SSBC and initial
CH HSS effects.

The solar wind environment was above background levels on 17 Oct
under the influence of a CH HSS with wind speeds between 700-800
km/s. Wind speeds gradually tapered to background conditions on
18-19 Oct. Winds increased again to around 450 km/s and minor
enhancements to total field were observed on 23 Oct due to a SSBC
and weak CH HSS effects. is the U.S. government's official web portal to all federal, state and local government web resources and services.