Viewing archive of Friday, 24 October 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Oct 24 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 297 Issued at 2200Z on 24 Oct 2025IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z Solar activity has been at low levels for the past 24 hours.
There are currently 8 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a slight chance for an M-class flare on days one, two, and three (25
Oct, 26 Oct, 27 Oct).
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 592 km/s at 24/0502Z. Total IMF reached 8
nT at 24/0027Z. The maximum southward component of Bz reached -6 nT at
24/0009Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 556 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one and two (25 Oct, 26 Oct)
and quiet to active levels on day three (27 Oct).
III. Event Probabilities 25 Oct to 27 Oct
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 24 Oct 134 Predicted 25 Oct-27 Oct 140/140/135 90 Day Mean 24 Oct 153
V. Geomagnetic A Indices
Observed Afr/Ap 23 Oct 004/006 Estimated Afr/Ap 24 Oct 008/010 Predicted Afr/Ap 25 Oct-27 Oct 008/010-007/008-009/012
VI. Geomagnetic Activity Probabilities 25 Oct to 27 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 25% |
| Minor storm | 05% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 25% | 30% |
| Major-severe storm | 25% | 20% | 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 | 2026/01/20 | Kp8 (G4) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
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| Last 30 days | 111.9 +4 |