Routine Space Environment Product Issued Weekly
Issued by NWS
FXXX06 KWNP 220556
:Product: 7-day Space Weather Highlights
:Issued: 2016 Aug 22 0524 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
15 - 21 August 2016
Solar activity was at low levels on 15 August due to an isolated C1
flare at 15/0023 UTC from Region 2578 (N09, L=084, class/area
Cro/020 on 18 Aug). Very low levels were observed from 16-21 August.
Although Regions 2574 (N05, L=173, class/area Dho/290 on 09 Aug),
2576 (S15, L=160, class/area Hsx/140 on 10 Aug), 2577 (N03, L=164,
class/area Dso/130 on 12 Aug), and 2578 were on the visible disk
during the period, the regions appeared to be in slow decay. No
Earth-directed coronal mass ejections were observed.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit was at
high levels on 15-16 August, moderate levels on 17 and 19-21 August
and normal levels on 18 August. The largest flux of the period was
9,570 pfu observed at 15/1605 UTC.
Geomagnetic field activity was at mostly quiet to unsettled levels
with an isolated active period observed on 21 August due to a pair
of weak, negative polarity coronal hole high speed streams (CH HSS).
Quiet levels were observed on 15 August under a nominal solar wind
regime. By early on 17 August, solar wind speed increased to 435
km/s while total field increased to near 9 nT. Quiet to unsettled
levels were observed from 16-18 August with quiet levels on 19-20
August. Solar wind speed decreased slowly until midday on 21 August
when another CH HSS became geoeffective. The geomagnetic field
responded with quiet to active levels on 21 August.