:Issued: 2018 Sep 03 0229 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# http://www.swpc.noaa.gov/weekly.html
#
# Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity 27 August-2 September 2018
Solar activity was at very low levels. Both Regions 2719 (S07, L=131
class/area Cro/040 on 23 Aug) and 2720 (N08, L=136 class/area
Dao/100 on 25 Aug) quietly rotated off the disk on 29 Aug as areas
of plage. Region 2720 resided on the disk as a low latitude, reverse
polarity group. No Earth-directed CMEs were observed.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit was at
very high levels on 28-29 Aug and at high levels on 27 Aug, 30-31
Aug and 01-02 Sep). A peak flux of 97,630 pfu was observed at
28/2145 UTC.
Geomagnetic field activity ranged from unsettled to G1 (Minor) and
G2 (Moderate) storm levels on 27 Aug followed by unsettled to active
levels on 28 Aug. Quiet levels persisted on 29 Aug - 02 Sep. The
period began under the continued, but waning, effects from the 19
and 20 Aug CMEs. This was coupled with influence from a positive
polarity CH HSS. Solar wind speeds began the period near 550 km/s
and gradually increased to a peak speed of 666 km/s observed at
17/1730 UTC. Total IMF reached 7 nT at 27/1607 UTC while the Bz
component reached a maximum southward extent of -6 nT at 27/1627
UTC.
By midday on 28 Aug, field activity declined to quiet levels and
remained so through the end of the summary period. The IMF was at
nominal levels while solar wind speed gradually decreased to near
340 km/s by the end of the period.
Forecast of Solar and Geomagnetic Activity 03 - 29 September 2018
Solar activity is expected to be at very low levels through the
outlook period. A slight chance for low levels is possible from
05-24 Sep with the return of old Regions 2718 (S07, L=191), 2719
(S07, L=131) and 2720 (N08, L=136).
No proton events are expected at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit is
expected to be at high levels on 03-04 Sep, 13-20 Sep and 23-26 Sep
due to recurrent CH HSS influence. Normal to moderate levels are
expected on 05-12 Sep, 21-22 Sep and 27-29 Sep.
Geomagnetic field activity is expected to be at unsettled levels on
03 Sep due to effects from a SSBC. Unsettled to active levels are
anticipated on 07-09 Sep, 11-17 Sep and 22-23 Sep with G1 (Minor)
geomagnetic storm levels possible on 11 Sep, all due to CH HSS
activity.
:Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2018 Sep 03 0229 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# http://www.swpc.noaa.gov/wwire.html
#
# 27-day Space Weather Outlook Table
# Issued 2018-09-03
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2018 Sep 03 68 8 3
2018 Sep 04 68 5 2
2018 Sep 05 70 5 2
2018 Sep 06 70 5 2
2018 Sep 07 70 8 3
2018 Sep 08 70 12 4
2018 Sep 09 70 8 3
2018 Sep 10 72 5 2
2018 Sep 11 75 18 5
2018 Sep 12 75 15 4
2018 Sep 13 75 12 4
2018 Sep 14 75 12 4
2018 Sep 15 75 10 3
2018 Sep 16 75 15 4
2018 Sep 17 75 10 3
2018 Sep 18 72 5 2
2018 Sep 19 72 5 2
2018 Sep 20 72 5 2
2018 Sep 21 72 5 2
2018 Sep 22 72 12 4
2018 Sep 23 70 8 3
2018 Sep 24 68 5 2
2018 Sep 25 68 5 2
2018 Sep 26 68 5 2
2018 Sep 27 68 5 2
2018 Sep 28 68 5 2
2018 Sep 29 68 5 2
(SWPC via DXLD)
