Viewing archive of Friday, 13 March 2026
Solar activity report
Report of Solar-Geophysical Activity 2026 Mar 13 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 72 Issued at 2200Z on 13 Mar 2026IA. Analysis of Solar Active Regions and Activity from 12-2100Z to 13-2100Z Solar activity has been at moderate levels for the past 24
hours. There are currently 7 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 and two (14 Mar, 15 Mar) and
expected to be low with a slight chance for an M-class flare on day
three (16 Mar).
IIA. Geophysical Activity Summary 12-2100Z to 13-2100Z
The geomagnetic
field has been at quiet to minor storm levels for the past 24 hours.
Solar wind speed reached a peak of 688 km/s at 13/2039Z. Total IMF
reached 13 nT at 13/0940Z. The maximum southward component of Bz reached
-8 nT at 13/0813Z. Electrons greater than 2 MeV at geosynchronous orbit
reached a peak level of 1203 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on day one (14 Mar) and quiet to
active levels on days two and three (15 Mar, 16 Mar).
III. Event Probabilities 14 Mar to 16 Mar
| Class M | 25% | 25% | 20% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 13 Mar 120 Predicted 14 Mar-16 Mar 115/110/110 90 Day Mean 13 Mar 142
V. Geomagnetic A Indices
Observed Afr/Ap 12 Mar 007/008 Estimated Afr/Ap 13 Mar 021/027 Predicted Afr/Ap 14 Mar-16 Mar 017/020-011/012-011/012
VI. Geomagnetic Activity Probabilities 14 Mar to 16 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 45% | 35% | 35% |
| Minor storm | 25% | 15% | 15% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 10% | 10% |
| Minor storm | 20% | 25% | 25% |
| Major-severe storm | 65% | 45% | 45% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/02/04 | X4.21 |
| Last M-flare | 2026/03/13 | M1.2 |
| Last geomagnetic storm | 2026/03/13 | 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 | 83.5 +5.3 |
| Last 30 days | 58.3 -70.3 |