Viewing archive of Wednesday, 29 October 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Oct 29 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 302 Issued at 2200Z on 29 Oct 2025IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 6 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 (30 Oct, 31 Oct)
and likely to be low with a slight chance for an M-class flare on day
three (01 Nov).
IIA. Geophysical Activity Summary 28-2100Z to 29-2100Z
The geomagnetic
field has been at unsettled to active levels for the past 24 hours.
Solar wind speed reached a peak of 607 km/s at 29/1605Z. Total IMF
reached 13 nT at 29/0029Z. The maximum southward component of Bz reached
-11 nT at 28/2132Z. Electrons greater than 2 MeV at geosynchronous
orbit reached a peak level of 333 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to minor storm levels on day one (30 Oct), unsettled
to active levels on day two (31 Oct) and quiet to unsettled levels on
day three (01 Nov).
III. Event Probabilities 30 Oct to 01 Nov
| Class M | 05% | 05% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 29 Oct 118 Predicted 30 Oct-01 Nov 118/115/130 90 Day Mean 29 Oct 152
V. Geomagnetic A Indices
Observed Afr/Ap 28 Oct 014/019 Estimated Afr/Ap 29 Oct 017/021 Predicted Afr/Ap 30 Oct-01 Nov 020/025-014/018-008/010
VI. Geomagnetic Activity Probabilities 30 Oct to 01 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 35% | 20% |
| Minor storm | 25% | 15% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 20% | 30% | 30% |
| Major-severe storm | 65% | 50% | 25% |
All times in UTC
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| Last M-flare | 2026/01/21 | M3.4 |
| Last geomagnetic storm | 2026/01/22 | Kp5+ (G1) |
| Spotless days | |
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| Monthly mean Sunspot Number | |
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