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Solar activity report
Report of Solar-Geophysical Activity 2025 Jun 30 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 181 Issued at 2200Z on 30 Jun 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 11 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 (01 Jul, 02 Jul,
03 Jul).
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 1057 km/s at 30/0753Z. Total IMF reached 6
nT at 30/1602Z. The maximum southward component of Bz reached -6 nT at
30/1621Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 8726 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (01 Jul), unsettled to minor
storm levels on day two (02 Jul) and quiet to minor storm levels on day
three (03 Jul).
III. Event Probabilities 01 Jul to 03 Jul
| Class M | 25% | 25% | 25% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 30 Jun 128 Predicted 01 Jul-03 Jul 126/125/125 90 Day Mean 30 Jun 143
V. Geomagnetic A Indices
Observed Afr/Ap 29 Jun 009/ 011 Estimated Afr/Ap 30 Jun 008/010 Predicted Afr/Ap 01 Jul-03 Jul 010/012-025/032-015/020
VI. Geomagnetic Activity Probabilities 01 Jul to 03 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 35% | 40% |
| Minor storm | 05% | 30% | 25% |
| Major-severe storm | 01% | 15% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 05% | 10% |
| Minor storm | 25% | 20% | 20% |
| Major-severe storm | 30% | 70% | 65% |
All times in UTC
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Space weather facts
| Last X-flare | 2025/06/19 | X1.9 |
| Last M-flare | 2025/10/03 | M1.2 |
| Last geomagnetic storm | 2025/10/03 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| September 2025 | 129.8 -3.7 |
| October 2025 | 140.1 +10.3 |
| Last 30 days | 131.3 -1.2 |