Viewing archive of Friday, 21 March 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Mar 21 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 80 Issued at 2200Z on 21 Mar 2025IA. Analysis of Solar Active Regions and Activity from 20-2100Z to 21-2100Z
Solar activity has been at moderate levels for the past 24
hours. There are currently 13 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 (22 Mar, 23 Mar,
24 Mar).
IIA. Geophysical Activity Summary 20-2100Z to 21-2100Z
The geomagnetic
field has been at quiet to minor storm levels for the past 24 hours.
Solar wind speed reached a peak of 528 km/s at 21/2055Z. Total IMF
reached 39 nT at 21/1755Z. The maximum southward component of Bz reached
-20 nT at 21/1614Z. Electrons greater than 2 MeV at geosynchronous
orbit reached a peak level of 960 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to major storm levels on day one (22 Mar), quiet to
active levels on day two (23 Mar) and quiet to unsettled levels on day
three (24 Mar).
III. Event Probabilities 22 Mar to 24 Mar
| Class M | 25% | 25% | 25% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 21 Mar 165 Predicted 22 Mar-24 Mar 165/160/155 90 Day Mean 21 Mar 188
V. Geomagnetic A Indices
Observed Afr/Ap 20 Mar 005/008 Estimated Afr/Ap 21 Mar 018/027 Predicted Afr/Ap 22 Mar-24 Mar 019/028-011/012-007/008
VI. Geomagnetic Activity Probabilities 22 Mar to 24 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 20% |
| Minor storm | 40% | 15% | 05% |
| Major-severe storm | 25% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 15% | 15% |
| Minor storm | 15% | 30% | 25% |
| Major-severe storm | 79% | 40% | 30% |
All times in UTC
Current data suggests there is a slight possibility for aurora to appear at the following high latitude regions in the near future
NuukThe solar wind speed is currently moderately high (634 km/sec.)
The density of the solar wind is moderate (25.56 p/cm3)
The density of the solar wind is moderate (25.56 p/cm3)
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Space weather facts
| Last X-flare | 2025/02/23 | X2.0 |
| Last M-flare | 2025/03/26 | M1.0 |
| Last geomagnetic storm | 2025/03/22 | Kp6- (G2) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2025 | 154.6 +17.6 |
| March 2025 | 135 -19.6 |
| Last 30 days | 133.8 -19.2 |