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Solar activity report
Report of Solar-Geophysical Activity 2026 Apr 01 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 91 Issued at 2200Z on 01 Apr 2026IA. Analysis of Solar Active Regions and Activity from 31-2100Z to 01-2100Z 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 likely to be moderate
with a slight chance for an X-class flare on days one, two, and three
(02 Apr, 03 Apr, 04 Apr).
IIA. Geophysical Activity Summary 31-2100Z to 01-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 511 km/s at 01/1138Z. Total IMF reached 16
nT at 01/1156Z. The maximum southward component of Bz reached -9 nT at
01/1228Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 2587 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on day one (02 Apr), quiet to
active levels on day two (03 Apr) and unsettled to active levels on day
three (04 Apr). Protons have a slight chance of crossing threshold on
days one, two, and three (02 Apr, 03 Apr, 04 Apr).
III. Event Probabilities 02 Apr to 04 Apr
| Class M | 55% | 55% | 55% |
| Class X | 15% | 15% | 15% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 01 Apr 142 Predicted 02 Apr-04 Apr 145/140/135 90 Day Mean 01 Apr 138
V. Geomagnetic A Indices
Observed Afr/Ap 31 Mar 008/007 Estimated Afr/Ap 01 Apr 011/014 Predicted Afr/Ap 02 Apr-04 Apr 014/022-015/018-015/021
VI. Geomagnetic Activity Probabilities 02 Apr to 04 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 40% | 35% |
| Minor storm | 35% | 20% | 15% |
| Major-severe storm | 10% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 10% | 10% |
| Minor storm | 25% | 25% | 20% |
| Major-severe storm | 70% | 60% | 45% |
All times in UTC
Latest news
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Space weather facts
| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/04/09 | M1.0 |
| Last geomagnetic storm | 2026/04/03 | Kp7- (G3) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2026 | 85.9 +7.7 |
| April 2026 | 94.2 +8.3 |
| Last 30 days | 94.7 +35.4 |
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