Viewing archive of Saturday, 1 November 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Nov 01 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 305 Issued at 2200Z on 01 Nov 2025IA. Analysis of Solar Active Regions and Activity from 31-2100Z to 01-2100Z Solar activity has been at low levels for the past 24 hours.
There are currently 2 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 day one (02 Nov) and expected to be low
with a chance for M-class flares and a slight chance for an X-class
flare on days two and three (03 Nov, 04 Nov).
IIA. Geophysical Activity Summary 31-2100Z to 01-2100Z
The geomagnetic
field has been at unsettled levels for the past 24 hours. Solar wind
speed reached a peak of 685 km/s at 31/2320Z. Total IMF reached 7 nT at
01/2030Z. The maximum southward component of Bz reached -5 nT at
01/2008Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 10573 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and two (02 Nov, 03 Nov) and
quiet to unsettled levels on day three (04 Nov).
III. Event Probabilities 02 Nov to 04 Nov
| Class M | 25% | 35% | 45% |
| Class X | 05% | 10% | 10% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 01 Nov 115 Predicted 02 Nov-04 Nov 115/120/125 90 Day Mean 01 Nov 151
V. Geomagnetic A Indices
Observed Afr/Ap 31 Oct 016/025 Estimated Afr/Ap 01 Nov 013/014 Predicted Afr/Ap 02 Nov-04 Nov 013/013-010/010-008/008
VI. Geomagnetic Activity Probabilities 02 Nov to 04 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 25% | 20% |
| Minor storm | 20% | 10% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 30% | 30% | 25% |
| Major-severe storm | 50% | 40% | 30% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/01/18 | X1.9 |
| Last M-flare | 2026/01/21 | M3.4 |
| Last geomagnetic storm | 2026/01/22 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| December 2025 | 124 +32.2 |
| January 2026 | 114.4 -9.6 |
| Last 30 days | 118.1 +9.1 |