Solar activity report
Below you'll find a daily report brought to you by the NOAA about the solar activity and auroral activity during the past day and the prediction for the coming days. This page is daily updated around midnight.
Report of Solar-Geophysical Activity 2026 Jun 17 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 168 Issued at 2200Z on 17 Jun 2026IA. Analysis of Solar Active Regions and Activity from 16-2100Z to 17-2100Z 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 day one (18 Jun) and expected to
be low with a slight chance for an M-class flare on days two and three
(19 Jun, 20 Jun).
IIA. Geophysical Activity Summary 16-2100Z to 17-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 509 km/s at 17/1452Z. Total IMF reached 12 nT at
17/0535Z. The maximum southward component of Bz reached -6 nT at
17/0803Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 1012 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (18 Jun) and quiet to
active levels on days two and three (19 Jun, 20 Jun).
III. Event Probabilities 18 Jun to 20 Jun
| Class M | 10% | 15% | 15% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 17 Jun 111 Predicted 18 Jun-20 Jun 112/114/118 90 Day Mean 17 Jun 126
V. Geomagnetic A Indices
Observed Afr/Ap 16 Jun 006/006 Estimated Afr/Ap 17 Jun 005/006 Predicted Afr/Ap 18 Jun-20 Jun 008/010-015/015-011/012
VI. Geomagnetic Activity Probabilities 18 Jun to 20 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 35% | 30% |
| Minor storm | 05% | 20% | 15% |
| Major-severe storm | 01% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 15% |
| Minor storm | 25% | 30% | 25% |
| Major-severe storm | 30% | 50% | 40% |
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Space weather facts
| Last X-flare | 2026/06/03 | X1.0 |
| Last M-flare | 2026/06/06 | M1.8 |
| 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 | 108.1 +6.7 |
| Last 30 days | 109.2 +12.9 |
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