Viewing archive of Thursday, 26 March 2026
Solar activity report
Report of Solar-Geophysical Activity 2026 Mar 26 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 85 Issued at 2200Z on 26 Mar 2026IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z 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, two, and three (27 Mar, 28 Mar,
29 Mar).
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 543 km/s at 25/2138Z. Total IMF reached 5
nT at 26/1328Z. The maximum southward component of Bz reached -5 nT at
26/1403Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 11381 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one and three (27 Mar, 29
Mar) and quiet levels on day two (28 Mar).
III. Event Probabilities 27 Mar to 29 Mar
| Class M | 40% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 26 Mar 152 Predicted 27 Mar-29 Mar 157/160/158 90 Day Mean 26 Mar 140
V. Geomagnetic A Indices
Observed Afr/Ap 25 Mar 012/017 Estimated Afr/Ap 26 Mar 012/014 Predicted Afr/Ap 27 Mar-29 Mar 008/008-006/005-007/008
VI. Geomagnetic Activity Probabilities 27 Mar to 29 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 10% | 20% |
| Minor storm | 05% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 20% | 25% |
| Major-severe storm | 25% | 20% | 25% |
All times in UTC
Latest news
Tuesday, 17 March 2026
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Complex sunspot region 4366
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CME impact! S4 solar radiation storm
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Space weather facts
| Last X-flare | 2026/02/04 | X4.21 |
| Last M-flare | 2026/03/26 | M4.0 |
| Last geomagnetic storm | 2026/03/25 | Kp5+ (G1) |
| 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 | 81.4 +3.2 |
| Last 30 days | 80 -0.8 |