Product: Weekly Highlights and Forecasts
:Issued: 2021 Jul 26 0122 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 19 - 25 July 2021
Solar activity was very low on 22 and 25 July with only B-class flares observed. Low levels of solar activity were observed on 19-21, and 23-24 July due to C-class flare activity. A total of six C-flares were observed this period, five C1 flares and a C4 flare at 24/0033 UTC. Regions 2845 (S15, L=195, class/area=Dso/60 on 21 July) and 2849 (S18, L=058, class/area=Axx/20 on 22 July) were the primary producers of C-class flare activity this period. A slow-moving CME was observed on 25 July from the vicinity of plage region 2848 (N21, L=120 on 25 July) may disrupt the near-Earth solar wind environment on 29 July. Multiple other CMEs were observed in LASCO coronagraph imagery throughout the week, however, none were Earth-directed.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit was normal to moderate throughout the period.
Geomagnetic field activity reached unsettled and active levels on 22 July due to positive polarity CH HSS influence. Quiet to unsettled conditions were observed on 19-20 July, and quiet levels were observed on 21 and 23-25 July under a nominal solar wind regime.
Forecast of Solar and Geomagnetic Activity 26 July - 21 August 2021
Solar activity is expected to be very low-to-low throughout the outlook period with B-class flares expected and a chance for C-class flares.
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 throughout the outlook period.
Geomagnetic field activity is expected to reach active levels on 28-29 July due to positive polarity CH HSS influence and the possible glancing blow of a CME from 25 July. Active conditions are expected on 10 Aug, with unsettled conditions expected on 11 Aug, due to recurrent negative polarity CH HSS influence. Unsettled conditions are expected on 16-17 Aug due to recurrent positive polarity CH HSS influence. Mostly quiet conditions are expected to prevail throughout the remainder of the outlook period.
Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2021 Jul 26 0122 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 2021-07-26
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2021 Jul 26 82 5 2
2021 Jul 27 82 5 2
2021 Jul 28 82 12 4
2021 Jul 29 82 12 4
2021 Jul 30 82 8 3
2021 Jul 31 82 5 2
2021 Aug 01 82 5 2
2021 Aug 02 78 8 3
2021 Aug 03 75 5 2
2021 Aug 04 75 5 2
2021 Aug 05 75 5 2
2021 Aug 06 75 5 2
2021 Aug 07 75 5 2
2021 Aug 08 75 5 2
2021 Aug 09 75 5 2
2021 Aug 10 75 12 4
2021 Aug 11 75 10 3
2021 Aug 12 75 5 2
2021 Aug 13 78 5 2
2021 Aug 14 80 5 2
2021 Aug 15 82 5 2
2021 Aug 16 85 10 3
2021 Aug 17 90 8 3
2021 Aug 18 90 5 2
2021 Aug 19 85 5 2
2021 Aug 20 85 5 2
2021 Aug 21 80 5 2
NOAA
