Product: Weekly Highlights and Forecasts
:Issued: 2025 Aug 04 0137 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 28 July - 03 August 2025
.jpg)
Solar activity was at low levels on 28 Jul - 02 Aug and moderate (R1-Minor) levels on 03 Aug. The largest flare of the period was an M2.9/2b event observed from Region 4168 (N05, L-103, class/area Dai/060 on 03 Aug) at 03/1357 UTC. The region also produced numerous C-class events. Numerous C-class activity was observed from Regions 4153 (S30, L=217, class/area Dai/210 on 25 Jul), 4155 (S10, L=192, class/area Dai/070 on 26 Jul) and 4167 (N10, L=170, class/area Dki/430 on 03 Aug). 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 reached high levels on 28 Jul, 31 Jul and 01 Aug with a maximum flux of 1,870 pfu observed at 28/1520 UTC. Normal to moderate levels were observed on 29-30 Jul and 02-03 Aug.
Geomagnetic field activity was at quiet to unsettled levels the entire highlight period. A single active period was observed late on 03 Aug. A majority of the unsettled periods was due to weak negative polarity CH HSS influence. Solar wind speeds were at mostly 400 km/s from 28 Jul through midday on 30 Jul and 475-500 km/s from midday 30 Jul through 03 Aug with a peak velocity observed at 600 km/s late on 03 Aug.
Forecast of Solar and Geomagnetic Activity 04 August - 30 August 2025
Solar activity is expected to be at mostly low levels with a chance for M-class (R1-R2, Minor-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 12-18 Aug and 21-28 Aug all due to recurrent CH HSS influences. Normal to moderate levels are expected on 04-11 Aug, 18-19 Aug and 39-30 Aug.
Geomagnetic field activity is expected to be at active to G1 (Minor) storm levels on11-15 Aug, 18-22 Aug and 25-30 Aug 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 Aug 04 0137 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web ontact www.swpc.noaa.gov/content/subscription-services
#
# 27-day Space Weather Outlook Table
# Issued 2025-08-04
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2025 Aug 04 145 12 4
2025 Aug 05 140 10 3
2025 Aug 06 140 8 3
2025 Aug 07 135 8 3
2025 Aug 08 135 5 2
2025 Aug 09 135 5 2
2025 Aug 10 135 5 2
2025 Aug 11 130 25 5
2025 Aug 12 130 18 5
2025 Aug 13 130 20 5
2025 Aug 14 135 12 4
2025 Aug 15 135 8 3
2025 Aug 16 145 5 2
2025 Aug 17 155 5 2
2025 Aug 18 155 15 5
2025 Aug 19 155 25 5
2025 Aug 20 150 15 5
2025 Aug 21 150 8 3
2025 Aug 22 150 12 4
2025 Aug 23 145 5 2
2025 Aug 24 145 5 2
2025 Aug 25 140 8 3
2025 Aug 26 140 8 3
2025 Aug 27 135 10 3
2025 Aug 28 135 12 4
2025 Aug 29 130 8 3
2025 Aug 30 125 10 3
(NOAA)
