Routine Space Environment Product Issued Weekly
Issued by NWS

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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. is the U.S. government's official web portal to all federal, state and local government web resources and services.