Product: Weekly Highlights and Forecasts
:Issued: 2025 Jul 28 0129 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 21 - 27 July 2025
.jpg)
Solar activity was at low levels. The largest flare was a C8.1/Sf at 24/0545 UTC from an unnumbered region located behind the west limb. Region 4149 (N17, L=247, class/area Eko/280 on 25 Jul) produced a C7.4/Sf at 25/0101 UTC. Several C-class flares were also observed from several other regions during the highlight period. No Earth-directed CME activity was observed.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit was at high levels on 21-22 July and 24-27 July with a normal to moderate period on 23 July. The maximum flux was 13,000 pfu observed at 21/1700 UTC.
Geomagnetic field activity reached G1 (Minor) storm levels on 22 and 23 July due to negative polarity CH HSS influence. Solar wind speeds were elevated to as high as 737 km/s late on 23 July. The remaining days were quiet to active levels due to weak negative polarity CH HSS influence.
Forecast of Solar and Geomagnetic Activity 28 July - 23 August 2025
Solar activity is expected to be at mostly low levels with a chance for M-class (R1-R2, Minor to Moderate) flares for 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 high levels on 28 July, 05-06 August and 10-23 August all due to recurrent CH HSS influences. Low to moderate levels are expected on the remaining days.
Geomagnetic field activity is expected to be at active to G1 (Minor) storm levels on 04 August, 07-14 August and 18-22 August due to recurrent CH HSS effects. Quiet to unsettled levels are expected on the remaining days of the outlook period.
Product: 27-day Space Weather Outlook Table 27DO.txt
:
Issued: 2025 Jul 28 0129 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 2025-07-28
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2025 Jul 28 145 10 3
2025 Jul 29 145 8 3
2025 Jul 30 140 10 3
2025 Jul 31 140 10 3
2025 Aug 01 135 8 3
2025 Aug 02 140 5 2
2025 Aug 03 150 5 2
2025 Aug 04 155 12 4
2025 Aug 05 155 8 3
2025 Aug 06 155 5 2
2025 Aug 07 155 20 5
2025 Aug 08 160 15 4
2025 Aug 09 160 25 5
2025 Aug 10 160 18 4
2025 Aug 11 160 25 5
2025 Aug 12 155 18 4
2025 Aug 13 160 20 5
2025 Aug 14 160 12 4
2025 Aug 15 155 8 3
2025 Aug 16 155 5 2
2025 Aug 17 150 5 2
2025 Aug 18 150 15 4
2025 Aug 19 150 25 5
2025 Aug 20 150 15 4
2025 Aug 21 145 8 3
2025 Aug 22 140 12 4
2025 Aug 23 135 5 2
(NOAA)
