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Tuesday, August 22, 2023

Weekly Propagation Forecast Bulletins

 

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)