Viewing archive of Friday, 10 April 2026
Solar activity report
Report of Solar-Geophysical Activity 2026 Apr 10 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 100 Issued at 2200Z on 10 Apr 2026IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 3 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
with a chance for a C-class flares on days one, two, and three (11 Apr,
12 Apr, 13 Apr).
IIA. Geophysical Activity Summary 09-2100Z to 10-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 701 km/s at 10/2044Z. Total IMF reached 14
nT at 10/0723Z. The maximum southward component of Bz reached -9 nT at
10/1219Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 1713 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to minor storm levels on day one (11 Apr), quiet to
active levels on day two (12 Apr) and quiet to unsettled levels on day
three (13 Apr).
III. Event Probabilities 11 Apr to 13 Apr
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 10 Apr 094 Predicted 11 Apr-13 Apr 092/090/090 90 Day Mean 10 Apr 136
V. Geomagnetic A Indices
Observed Afr/Ap 09 Apr 006/007 Estimated Afr/Ap 10 Apr 019/022 Predicted Afr/Ap 11 Apr-13 Apr 018/025-012/015-010/010
VI. Geomagnetic Activity Probabilities 11 Apr to 13 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 30% | 15% |
| Minor storm | 25% | 15% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 20% | 30% | 25% |
| Major-severe storm | 55% | 45% | 25% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/07/04 | X1.3 |
| Last M-flare | 2026/07/12 | M1.19 |
| Last geomagnetic storm | 2026/07/04 | Kp7+ (G3) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (2%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| June 2026 | 94.4 -7.1 |
| July 2026 | 74.8 -19.6 |
| Last 30 days | 87 -20.2 |
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