Viewing archive of Friday, 25 July 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Jul 25 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 206 Issued at 2200Z on 25 Jul 2025IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z Solar activity has been at low levels for the past 24 hours.
There are currently 8 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares on days one, two, and three (26 Jul, 27 Jul,
28 Jul).
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 671 km/s at 24/2132Z. Total IMF reached 6 nT at
25/2058Z. The maximum southward component of Bz reached -4 nT at
25/1324Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 3123 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on day one (26 Jul), quiet to minor storm levels
on day two (27 Jul) and quiet to unsettled levels on day three (28 Jul).
III. Event Probabilities 26 Jul to 28 Jul
| Class M | 40% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 25 Jul 148 Predicted 26 Jul-28 Jul 155/160/160 90 Day Mean 25 Jul 135
V. Geomagnetic A Indices
Observed Afr/Ap 24 Jul 016/015 Estimated Afr/Ap 25 Jul 007/008 Predicted Afr/Ap 26 Jul-28 Jul 005/006-014/020-010/012
VI. Geomagnetic Activity Probabilities 26 Jul to 28 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 35% | 35% |
| Minor storm | 01% | 30% | 15% |
| Major-severe storm | 01% | 10% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 10% | 10% |
| Minor storm | 20% | 20% | 25% |
| Major-severe storm | 10% | 65% | 50% |
All times in UTC
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Space weather facts
| Last X-flare | 2025/12/01 | X1.9 |
| Last M-flare | 2025/12/04 | M6.0 |
| Last geomagnetic storm | 2025/12/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
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| Last 30 days | 107.3 +14.6 |