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Solar activity report
Report of Solar-Geophysical Activity 2025 Mar 20 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 79 Issued at 2200Z on 20 Mar 2025IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z Solar activity has been at low levels for the past 24 hours.
There are currently 9 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 days one, two, and three (21 Mar, 22 Mar,
23 Mar).
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 515 km/s at 19/2126Z. Total IMF reached 6
nT at 20/0354Z. The maximum southward component of Bz reached -5 nT at
19/2124Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 584 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on day one (21 Mar) and quiet to active levels on
days two and three (22 Mar, 23 Mar).
III. Event Probabilities 21 Mar to 23 Mar
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 20 Mar 170 Predicted 21 Mar-23 Mar 170/165/155 90 Day Mean 20 Mar 189
V. Geomagnetic A Indices
Observed Afr/Ap 19 Mar 019/024 Estimated Afr/Ap 20 Mar 006/006 Predicted Afr/Ap 21 Mar-23 Mar 006/005-010/012-011/012
VI. Geomagnetic Activity Probabilities 21 Mar to 23 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 35% | 35% |
| Minor storm | 05% | 15% | 15% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 10% |
| Minor storm | 20% | 25% | 25% |
| Major-severe storm | 15% | 50% | 50% |
All times in UTC
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Space weather facts
| Last X-flare | 2025/03/28 | X1.1 |
| Last M-flare | 2025/04/15 | M1.2 |
| Last geomagnetic storm | 2025/04/16 | Kp8- (G4) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2025 | 134.2 -20.4 |
| April 2025 | 120.5 -13.7 |
| Last 30 days | 116.6 -25.7 |