Viewing archive of Saturday, 11 April 2026
Solar activity report
Report of Solar-Geophysical Activity 2026 Apr 11 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 101 Issued at 2200Z on 11 Apr 2026IA. Analysis of Solar Active Regions and Activity from 10-2100Z to 11-2100Z Solar activity has been at low levels for the past 24 hours.
There are currently 3 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be low with a
slight chance for an M-class flare on days one, two, and three (12 Apr,
13 Apr, 14 Apr).
IIA. Geophysical Activity Summary 10-2100Z to 11-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 653 km/s at 10/2158Z. Total IMF reached 11
nT at 11/0531Z. The maximum southward component of Bz reached -6 nT at
11/0509Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 1081 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and three (12 Apr, 14 Apr)
and quiet to unsettled levels on day two (13 Apr).
III. Event Probabilities 12 Apr to 14 Apr
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 11 Apr 093 Predicted 12 Apr-14 Apr 095/095/090 90 Day Mean 11 Apr 136
V. Geomagnetic A Indices
Observed Afr/Ap 10 Apr 016/018 Estimated Afr/Ap 11 Apr 015/019 Predicted Afr/Ap 12 Apr-14 Apr 010/012-008/008-009/012
VI. Geomagnetic Activity Probabilities 12 Apr to 14 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 15% | 35% |
| Minor storm | 15% | 05% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 25% | 30% |
| Major-severe storm | 45% | 25% | 45% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/04/24 | X2.5 |
| Last M-flare | 2026/05/17 | M1.4 |
| 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 | 90.4 +11.1 |
| Last 30 days | 100.4 +8.8 |
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