Viewing archive of Sunday, 29 March 2026
Solar activity report
Report of Solar-Geophysical Activity 2026 Mar 29 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 88 Issued at 2200Z on 29 Mar 2026IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z Solar activity has been at low levels for the past 24 hours.
There are currently 9 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares and a slight chance for an X-class flare on
days one, two, and three (30 Mar, 31 Mar, 01 Apr).
IIA. Geophysical Activity Summary 28-2100Z to 29-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 473 km/s at 29/1824Z. Total IMF reached 13
nT at 29/1720Z. The maximum southward component of Bz reached -7 nT at
29/0330Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 3754 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on day one (30 Mar), quiet to
active levels on day two (31 Mar) and quiet levels on day three (01
Apr).
III. Event Probabilities 30 Mar to 01 Apr
| Class M | 45% | 45% | 45% |
| Class X | 10% | 10% | 10% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 29 Mar 158 Predicted 30 Mar-01 Apr 155/152/155 90 Day Mean 29 Mar 139
V. Geomagnetic A Indices
Observed Afr/Ap 28 Mar 008/011 Estimated Afr/Ap 29 Mar 013/018 Predicted Afr/Ap 30 Mar-01 Apr 017/022-010/012-007/008
VI. Geomagnetic Activity Probabilities 30 Mar to 01 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 30% | 20% |
| Minor storm | 25% | 10% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 25% | 25% | 30% |
| Major-severe storm | 65% | 40% | 25% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/06/03 | X1.0 |
| Last M-flare | 2026/06/03 | M7.9 |
| Last geomagnetic storm | 2026/05/16 | Kp6- (G2) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (2%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2026 | 79.3 -6.6 |
| June 2026 | 139.5 +60.2 |
| Last 30 days | 97.8 +5.2 |
