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Solar activity report
Report of Solar-Geophysical Activity 2025 Jul 30 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 211 Issued at 2200Z on 30 Jul 2025IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z Solar activity has been at low levels for the past 24 hours.
There are currently 9 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 (31 Jul, 01 Aug,
02 Aug).
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 866 km/s at 30/0729Z. Total IMF reached 12
nT at 30/1109Z. The maximum southward component of Bz reached -9 nT at
30/1308Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 821 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (31 Jul), quiet to unsettled
levels on day two (01 Aug) and quiet levels on day three (02 Aug).
III. Event Probabilities 31 Jul to 02 Aug
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 30 Jul 149 Predicted 31 Jul-02 Aug 148/146/146 90 Day Mean 30 Jul 135
V. Geomagnetic A Indices
Observed Afr/Ap 29 Jul 009/ 008 Estimated Afr/Ap 30 Jul 008/012 Predicted Afr/Ap 31 Jul-02 Aug 012/014-008/008-006/008
VI. Geomagnetic Activity Probabilities 31 Jul to 02 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 15% | 10% |
| Minor storm | 10% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 25% | 20% |
| Major-severe storm | 45% | 25% | 20% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/03/30 | X1.4 |
| Last M-flare | 2026/03/28 | M1.3 |
| Last geomagnetic storm | 2026/03/25 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2026 | 78.2 -34.3 |
| March 2026 | 88.4 +10.2 |
| Last 30 days | 88.4 +14.9 |
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