Viewing archive of Tuesday, 11 March 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Mar 11 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 70 Issued at 2200Z on 11 Mar 2025IA. Analysis of Solar Active Regions and Activity from 10-2100Z to 11-2100Z Solar activity has been at high 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 chance for M-class flares on days one, two, and three (12 Mar, 13 Mar,
14 Mar).
IIA. Geophysical Activity Summary 10-2100Z to 11-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 548 km/s at 10/2144Z. Total IMF reached 8
nT at 11/2033Z. The maximum southward component of Bz reached -5 nT at
11/1236Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 4109 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (12 Mar) and unsettled to
active levels on days two and three (13 Mar, 14 Mar).
III. Event Probabilities 12 Mar to 14 Mar
| Class M | 35% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 11 Mar 161 Predicted 12 Mar-14 Mar 165/165/170 90 Day Mean 11 Mar 188
V. Geomagnetic A Indices
Observed Afr/Ap 10 Mar 008/009 Estimated Afr/Ap 11 Mar 009/013 Predicted Afr/Ap 12 Mar-14 Mar 007/010-012/015-015/018
VI. Geomagnetic Activity Probabilities 12 Mar to 14 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 35% | 30% |
| Minor storm | 05% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 30% | 30% |
| Major-severe storm | 25% | 45% | 40% |
All times in UTC
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Space weather facts
| Last X-flare | 2025/12/01 | X1.9 |
| Last M-flare | 2025/12/06 | M8.1 |
| Last geomagnetic storm | 2025/12/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 167.7 +75.9 |
| Last 30 days | 107.1 +13.7 |