Viewing archive of Tuesday, 18 November 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Nov 18 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 322 Issued at 2200Z on 18 Nov 2025IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z Solar activity has been at low levels for the past 24 hours.
There are currently 4 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 (19
Nov, 20 Nov, 21 Nov).
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 544 km/s at 17/2140Z. Total IMF reached 7
nT at 17/2216Z. The maximum southward component of Bz reached -3 nT at
17/2310Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 921 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one and two (19 Nov, 20 Nov) and quiet to
active levels on day three (21 Nov).
III. Event Probabilities 19 Nov to 21 Nov
| Class M | 15% | 15% | 15% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 18 Nov 120 Predicted 19 Nov-21 Nov 120/120/120 90 Day Mean 18 Nov 153
V. Geomagnetic A Indices
Observed Afr/Ap 17 Nov 009/011 Estimated Afr/Ap 18 Nov 005/005 Predicted Afr/Ap 19 Nov-21 Nov 006/005-006/005-009/012
VI. Geomagnetic Activity Probabilities 19 Nov to 21 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 35% |
| Minor storm | 05% | 05% | 15% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 10% |
| Minor storm | 20% | 20% | 25% |
| Major-severe storm | 20% | 20% | 50% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/01/18 | X1.9 |
| Last M-flare | 2026/01/19 | M1.2 |
| Last geomagnetic storm | 2026/01/19 | Kp9- (G4) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| December 2025 | 124 +32.2 |
| January 2026 | 103.8 -20.2 |
| Last 30 days | 109 +1.5 |