Viewing archive of Thursday, 30 October 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Oct 30 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 303 Issued at 2200Z on 30 Oct 2025IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 5 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
with a chance for a C-class flares on days one and two (31 Oct, 01 Nov)
and likely to be low with a slight chance for an M-class flare on day
three (02 Nov).
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
The geomagnetic
field has been at unsettled to minor storm levels for the past 24 hours.
Solar wind speed reached a peak of 677 km/s at 30/2040Z. Total IMF
reached 15 nT at 30/1012Z. The maximum southward component of Bz reached
-14 nT at 30/1023Z. Electrons greater than 2 MeV at geosynchronous
orbit reached a peak level of 393 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to active levels on day one (31 Oct) and quiet to
unsettled levels on days two and three (01 Nov, 02 Nov).
III. Event Probabilities 31 Oct to 02 Nov
| Class M | 05% | 05% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 30 Oct 120 Predicted 31 Oct-02 Nov 120/130/130 90 Day Mean 30 Oct 151
V. Geomagnetic A Indices
Observed Afr/Ap 29 Oct 015/020 Estimated Afr/Ap 30 Oct 027/036 Predicted Afr/Ap 31 Oct-02 Nov 014/018-008/010-007/008
VI. Geomagnetic Activity Probabilities 31 Oct to 02 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 20% | 15% |
| Minor storm | 15% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 30% | 30% | 25% |
| Major-severe storm | 50% | 25% | 25% |
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 | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 175.4 +83.6 |
| Last 30 days | 107.3 +14.6 |