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
Latest news
Sunday, 1 February 2026
Complex sunspot region 4366
Monday, 19 January 2026
CME impact! S4 solar radiation storm
Sunday, 18 January 2026
X1.9 solar flare with earth-directed CME
Latest forum messages
AR4392 (including CMEs) 54Incoming & Unnumbered Active Regions 223Current Farside Activity 416CH 31 HSS 10AR 4393 3
More topicsSupport SpaceWeatherLive.com!
A lot of people come to SpaceWeatherLive to follow the Solar activity or if there is a chance to see the aurora, but with more traffic comes higher costs to keep the servers online. If you like SpaceWeatherLive and want to support the project you can choose a subscription for an ad-free site or consider a donation. With your help we can keep SpaceWeatherLive online!
Space weather facts
| Last X-flare | 2026/02/04 | X4.21 |
| Last M-flare | 2026/03/17 | M1.3 |
| Last geomagnetic storm | 2026/03/14 | Kp6 (G2) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (4%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2026 | 78.2 -34.3 |
| March 2026 | 83.1 +4.9 |
| Last 30 days | 60 -62.3 |