Viewing archive of Friday, 12 June 2026
Solar activity report
Report of Solar-Geophysical Activity 2026 Jun 12 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 163 Issued at 2200Z on 12 Jun 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 5 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares on days one, two, and three (13 Jun, 14 Jun,
15 Jun).
IIA. Geophysical Activity Summary 11-2100Z to 12-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 577 km/s at 12/1607Z. Total IMF reached 15
nT at 12/0126Z. The maximum southward component of Bz reached -10 nT at
12/0136Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 464 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to major storm levels on day one (13 Jun), unsettled
to minor storm levels on day two (14 Jun) and quiet to active levels on
day three (15 Jun).
III. Event Probabilities 13 Jun to 15 Jun
| Class M | 35% | 35% | 35% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 12 Jun 128 Predicted 13 Jun-15 Jun 128/125/122 90 Day Mean 12 Jun 126
V. Geomagnetic A Indices
Observed Afr/Ap 11 Jun 016/018 Estimated Afr/Ap 12 Jun 017/021 Predicted Afr/Ap 13 Jun-15 Jun 025/036-016/022-010/012
VI. Geomagnetic Activity Probabilities 13 Jun to 15 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 45% | 30% |
| Minor storm | 45% | 25% | 05% |
| Major-severe storm | 15% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 10% | 15% |
| Minor storm | 15% | 25% | 30% |
| Major-severe storm | 80% | 60% | 35% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/06/03 | X1.0 |
| Last M-flare | 2026/06/20 | M1.0 |
| Last geomagnetic storm | 2026/06/11 | 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 | 100.6 -0.8 |
| Last 30 days | 107.8 +9.3 |
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