Viewing archive of Sunday, 12 April 2026
Solar activity report
Report of Solar-Geophysical Activity 2026 Apr 12 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 102 Issued at 2200Z on 12 Apr 2026IA. Analysis of Solar Active Regions and Activity from 11-2100Z to 12-2100Z 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 expected to be low with
a slight chance for an M-class flare on day one (13 Apr) and likely to
be low with a slight chance for an M-class flare on days two and three
(14 Apr, 15 Apr).
IIA. Geophysical Activity Summary 11-2100Z to 12-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 608 km/s at 12/0146Z. Total IMF reached 6 nT at
12/0215Z. The maximum southward component of Bz reached -4 nT at
12/1029Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 1609 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one and two (13 Apr, 14 Apr)
and quiet to active levels on day three (15 Apr).
III. Event Probabilities 13 Apr to 15 Apr
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 12 Apr 099 Predicted 13 Apr-15 Apr 095/090/100 90 Day Mean 12 Apr 135
V. Geomagnetic A Indices
Observed Afr/Ap 11 Apr 010/012 Estimated Afr/Ap 12 Apr 007/008 Predicted Afr/Ap 13 Apr-15 Apr 008/008-008/008-012/012
VI. Geomagnetic Activity Probabilities 13 Apr to 15 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 30% | 35% |
| Minor storm | 05% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 25% | 30% |
| Major-severe storm | 25% | 40% | 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 | 89.2 +9.9 |
| Last 30 days | 99.3 +7.6 |
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