Product: Weekly Highlights and Forecasts
:Issued: 2023 Aug 21 0150 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact www.swpc.noaa.gov/content/subscription-services
#
# Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity 14 - 20 August 2023
Solar activity was at low levels with only C-class flares. The largest of these C-class flares was a C8.9 that occurred on 15 Aug at 2110 UTC from Region 3405 (N10, L=181, Dso/Beta as on 16 Aug). Other notable activity included a type II radio sweep on 20 Aug at 0626 UTC with an estimated speed of 488 Km/s. This event was associated with a C3.7/SF flare at 20/0626 UTC from Region 3409 (N22, L=252, Bxo/Beta on 21 Aug).
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit, as measured by the GOES-16 satellite, reached high levels on 14 Aug with a peak flux of 1,250 pfu observed at 1330 UTC. Normal to moderate levels were observed 15-20 Aug.
Geomagnetic field activity was at quiet levels 14-15 and 17-18 Aug. Unsettled levels were reached on 16 Aug likely in response to weak transient influence coupled with a CIR. Unsettled levels were reached again 19-20 Aug due to negative polarity CH HSS effects.
Forecast of Solar and Geomagnetic Activity 21 August - 16 September 2023
Solar activity is expected to be low with a slight chance for M-class flare activity through the outlook period.
No proton events are expected at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit is expected to be at normal to moderate levels 21 Aug - 06 Sep and 11-16 Sep. High levels are expected 07-10 Sep in response to recurrent CH HSS influence.
Geomagnetic field activity is expected to be quiet 26 Aug - 05 Sep and 09-13 Sep. Unsettled levels are expected 21-25 Aug, 06-08 Sep and 15-16 Sep due to recurrent CH HSS effects. Active conditions are expected 14 Sep due to a recurrent CIR ahead of CH HSS onset.
Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2023 Aug 21 0150 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact www.swpc.noaa.gov/content/subscription-services
#
# 27-day Space Weather Outlook Table
# Issued 2023-08-21
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2023 Aug 21 153 10 3
2023 Aug 22 153 10 3
2023 Aug 23 155 10 3
2023 Aug 24 158 10 3
2023 Aug 25 158 10 3
2023 Aug 26 158 5 2
2023 Aug 27 158 5 2
2023 Aug 28 162 5 2
2023 Aug 29 162 5 2
2023 Aug 30 165 5 2
2023 Aug 31 165 5 2
2023 Sep 01 165 5 2
2023 Sep 02 163 5 2
2023 Sep 03 160 5 2
2023 Sep 04 162 5 2
2023 Sep 05 162 5 2
2023 Sep 06 158 10 3
2023 Sep 07 158 8 3
2023 Sep 08 160 8 3
2023 Sep 09 162 5 2
2023 Sep 10 158 5 2
2023 Sep 11 158 5 2
2023 Sep 12 155 5 2
2023 Sep 13 152 5 2
2023 Sep 14 152 12 4
2023 Sep 15 152 10 3
2023 Sep 16 153 10 3
(NOAA)