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Solar activity report
Report of Solar-Geophysical Activity 2025 Mar 09 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 68 Issued at 2200Z on 09 Mar 2025IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C2 event observed at
09/1854Z from Region 4019 (N07E43). There are currently 5 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 (10 Mar, 11 Mar,
12 Mar).
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
The geomagnetic
field has been at unsettled to major storm levels for the past 24 hours.
Solar wind speed reached a peak of 1349 km/s at 09/0255Z. Total IMF
reached 18 nT at 09/0346Z. The maximum southward component of Bz reached
-13 nT at 08/2100Z. Electrons greater than 2 MeV at geosynchronous
orbit reached a peak level of 422 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to minor storm levels on day one (10 Mar), unsettled
to active levels on day two (11 Mar) and quiet to active levels on day
three (12 Mar).
III. Event Probabilities 10 Mar to 12 Mar
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 09 Mar 148 Predicted 10 Mar-12 Mar 155/160/165 90 Day Mean 09 Mar 188
V. Geomagnetic A Indices
Observed Afr/Ap 08 Mar 015/020 Estimated Afr/Ap 09 Mar 025/034 Predicted Afr/Ap 10 Mar-12 Mar 019/025-015/020-009/012
VI. Geomagnetic Activity Probabilities 10 Mar to 12 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 30% | 30% |
| Minor storm | 30% | 10% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 25% | 30% | 30% |
| Major-severe storm | 65% | 40% | 35% |
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 | 2025/04/15 | Kp6+ (G2) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2025 | 134.2 -20.4 |
| April 2025 | 124.1 -10.1 |
| Last 30 days | 124.7 -16.6 |