Routine Space Environment Product Issued Weekly
Issued by NWS
FXXX06 KWNP 180156
:Product: 7-day Space Weather Highlights
:Issued: 2014 Aug 18 0139 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
11 - 17 August 2014
Solar activity was at very low to low levels. This period saw
predominately B-class flare activity with isolated C-class flare
activity, especially late in the period. The largest event of the
period was a C2/Sf flare at 0930 UTC on 16 Aug from Region 2144
(S17, L=107, class/area=Dsi/220 on 17 Aug). In addition to the C2
flare, Region 2144 produced two additional low-level C-class flares
and Region 2139 (N13, L=058, class/area=Eac/140 on 15 Aug)
contributed three low-level C-class flares this period.
A filament eruption estimated at 30 degree in extent was observed
leaving the solar disk in SDO/AIA 193 and 304 imagery between
1630-1715 UTC on 15 Aug. A subsequent partial-halo coronal mass
ejection (CME) was observed in SOHO/LASCO C2 coronagraph imagery
beginning at 15/1800 UTC. Forecaster analysis of this event and
WSA-ENLIL model output suggest an anticipated CME arrival at Earth
late on 19 Aug.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit was at
normal levels on 12 Aug with normal to moderate levels observed on
11, 13-17 Aug. A maximum flux value of 565 pfu was observed at 1605
UTC on 11 Aug.
Geomagnetic field activity was quiet on 13-16 Aug under nominal
solar wind conditions. Quiet to unsettled levels were observed on 11
and 17 Aug and quiet to active levels were observed on 12 Aug, due
to coronal hole high speed stream effects.