Solar activity report
Below you'll find a daily report brought to you by the NOAA about the solar activity and auroral activity during the past day and the prediction for the coming days. This page is daily updated around midnight.
Report of Solar-Geophysical Activity 2025 Mar 24 2220 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 83 Issued at 2200Z on 24 Mar 2025IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z Solar activity has been at low levels for the past 24 hours.
There are currently 6 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 (25 Mar, 26 Mar,
27 Mar).
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 439 km/s at 24/0657Z. Total IMF reached 16
nT at 24/0114Z. The maximum southward component of Bz reached -9 nT at
24/0121Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 351 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to major storm levels on day one (25 Mar), unsettled
to minor storm levels on day two (26 Mar) and quiet to active levels on
day three (27 Mar).
III. Event Probabilities 25 Mar to 27 Mar
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 24 Mar 156 Predicted 25 Mar-27 Mar 162/165/160 90 Day Mean 24 Mar 186
V. Geomagnetic A Indices
Observed Afr/Ap 23 Mar 009/012 Estimated Afr/Ap 24 Mar 017/023 Predicted Afr/Ap 25 Mar-27 Mar 022/030-015/020-012/015
VI. Geomagnetic Activity Probabilities 25 Mar to 27 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 35% | 35% |
| Minor storm | 35% | 30% | 20% |
| Major-severe storm | 25% | 15% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 10% |
| Minor storm | 15% | 20% | 30% |
| Major-severe storm | 75% | 70% | 50% |
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Space weather facts
| Last X-flare | 2025/02/23 | X2.0 |
| Last M-flare | 2025/03/21 | M1.2 |
| 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 | 138.3 -16.4 |
| Last 30 days | 136.1 -18.1 |