Viewing archive of Thursday, 2 April 2026
Solar activity report
Report of Solar-Geophysical Activity 2026 Apr 02 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 92 Issued at 2200Z on 02 Apr 2026IA. Analysis of Solar Active Regions and Activity from 01-2100Z to 02-2100Z Solar activity reached moderate levels over the past 24 hours.
There are currently 10 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
(03 Apr, 04 Apr, 05 Apr).
IIA. Geophysical Activity Summary 01-2100Z to 02-2100Z
The geomagnetic
field has been at quiet to major storm levels for the past 24 hours.
Solar wind speed reached a peak of 730 km/s at 02/1947Z. Total IMF
reached 17 nT at 02/0729Z. The maximum southward component of Bz reached
-15 nT at 02/0635Z. Protons greater than 10 MeV at geosynchronous orbit
reached a peak level of 3 pfu at 02/2035Z. Electrons greater than 2 MeV
at geosynchronous orbit reached a peak level of 543 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to major storm levels on day one (03 Apr), unsettled to
major storm levels on day two (04 Apr) and quiet to active levels on day
three (05 Apr). Protons have a chance of crossing threshold on days one
and two (03 Apr, 04 Apr) and have a chance of crossing threshold on day
three (05 Apr).
III. Event Probabilities 03 Apr to 05 Apr
| Class M | 55% | 55% | 55% |
| Class X | 20% | 20% | 20% |
| Proton | 50% | 50% | 25% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 02 Apr 140 Predicted 03 Apr-05 Apr 140/135/140 90 Day Mean 02 Apr 138
V. Geomagnetic A Indices
Observed Afr/Ap 01 Apr 008/009 Estimated Afr/Ap 02 Apr 031/048 Predicted Afr/Ap 03 Apr-05 Apr 027/037-029/041-014/016
VI. Geomagnetic Activity Probabilities 03 Apr to 05 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 30% | 30% |
| Minor storm | 40% | 45% | 10% |
| Major-severe storm | 30% | 25% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 15% |
| Minor storm | 15% | 15% | 30% |
| Major-severe storm | 85% | 85% | 40% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/06/03 | X1.0 |
| Last M-flare | 2026/06/21 | M6.9 |
| Last geomagnetic storm | 2026/06/25 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (2%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| May 2026 | 101.4 +22.1 |
| June 2026 | 100.5 -0.9 |
| Last 30 days | 105.1 +6.4 |
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