Viewing archive of Friday, 3 April 2026
Solar activity report
Report of Solar-Geophysical Activity 2026 Apr 03 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 93 Issued at 2200Z on 03 Apr 2026IA. Analysis of Solar Active Regions and Activity from 02-2100Z to 03-2100Z Solar activity has been at moderate levels for the past 24
hours. There are currently 8 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
(04 Apr, 05 Apr, 06 Apr).
IIA. Geophysical Activity Summary 02-2100Z to 03-2100Z
The geomagnetic
field has been at active to severe storm levels for the past 24 hours.
Solar wind speed reached a peak of 858 km/s at 03/1518Z. Total IMF
reached 14 nT at 03/1515Z. The maximum southward component of Bz reached
-11 nT at 03/1519Z. Protons greater than 10 MeV at geosynchronous orbit
reached a peak level of 6 pfu at 03/0405Z. Electrons greater than 2 MeV
at geosynchronous orbit reached a peak level of 4465 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to major storm levels on day one (04 Apr), quiet to
minor storm levels on day two (05 Apr) and quiet to active levels on day
three (06 Apr). Protons have a slight chance of crossing threshold on
days one, two, and three (04 Apr, 05 Apr, 06 Apr).
III. Event Probabilities 04 Apr to 06 Apr
| Class M | 55% | 55% | 55% |
| Class X | 15% | 15% | 15% |
| Proton | 15% | 15% | 15% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 03 Apr 136 Predicted 04 Apr-06 Apr 135/140/140 90 Day Mean 03 Apr 138
V. Geomagnetic A Indices
Observed Afr/Ap 02 Apr 030/043 Estimated Afr/Ap 03 Apr 028/054 Predicted Afr/Ap 04 Apr-06 Apr 025/037-014/018-010/012
VI. Geomagnetic Activity Probabilities 04 Apr to 06 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 40% | 30% |
| Minor storm | 35% | 25% | 15% |
| Major-severe storm | 25% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 10% | 15% |
| Minor storm | 15% | 25% | 30% |
| Major-severe storm | 80% | 65% | 40% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/04/24 | X2.5 |
| Last M-flare | 2026/05/22 | M2.3 |
| 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 |
| May 2026 | 91.5 +12.2 |
| Last 30 days | 96.4 +4.5 |
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