Routine Space Environment Product Issued Weekly
Issued by NWS
FXXX06 KWNP 280525
:Product: 7-day Space Weather Highlights
:Issued: 2015 Sep 28 0507 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
21 - 27 September 2015
Solar activity began the week at low levels but reached moderate
levels at the end of the period. Region 2420 (N10, L=102, class/area
Ekc/290 on 21 Sep) produced a C8/Sn flare at 21/0518 UTC on 21 Sep
and several B-class events on 22 Sep. Region 2422 (S20, L=102,
class/area Ekc/650 on 27 Sep) produced the majority of the activity
for the rest of the week with several C-class flares from 23-27 Sep
as well as two M-class flares on 27 Sep. The first M-class flare was
an M1/1f at 27/1040 UTC and the second reached M1/1n at 27/2100 UTC.
It also produced a C9/1n flare at 27/1958 UTC that was accompanied
by a 130 sfu Tenflare.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit was at
normal to moderate levels.
Geomagnetic field activity was at quiet to unsettled levels from
21-22 Sep due to waning coronal hole high speed stream (CH HSS)
effects. Quiet to unsettled levels were observed on 23 Sep with an
isolated active period from 23/1500-1800 UTC due to a prolonged
period of negative Bz. Quiet to unsettled levels returned on 24 Sep
followed by quiet conditions for the remainder of the period.