Viewing archive of Tuesday, 2 June 2026
Solar activity report
Report of Solar-Geophysical Activity 2026 Jun 02 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 153 Issued at 2200Z on 02 Jun 2026IA. Analysis of Solar Active Regions and Activity from 01-2100Z to 02-2100Z Solar activity has been at moderate levels for the past 24
hours. There are currently 9 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares and a slight chance for an X-class flare on
days one, two, and three (03 Jun, 04 Jun, 05 Jun).
IIA. Geophysical Activity Summary 01-2100Z to 02-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 426 km/s at 02/0559Z. Total IMF reached 8 nT at
01/2159Z. The maximum southward component of Bz reached -6 nT at
01/2341Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 684 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (03 Jun) and quiet to
active levels on days two and three (04 Jun, 05 Jun).
III. Event Probabilities 03 Jun to 05 Jun
| Class M | 50% | 50% | 50% |
| Class X | 10% | 10% | 10% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 02 Jun 146 Predicted 03 Jun-05 Jun 150/152/145 90 Day Mean 02 Jun 125
V. Geomagnetic A Indices
Observed Afr/Ap 01 Jun 009/009 Estimated Afr/Ap 02 Jun 006/007 Predicted Afr/Ap 03 Jun-05 Jun 009/010-011/014-010/012
VI. Geomagnetic Activity Probabilities 03 Jun to 05 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 35% | 35% |
| Minor storm | 10% | 15% | 15% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 15% |
| Minor storm | 30% | 30% | 35% |
| Major-severe storm | 30% | 50% | 40% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/06/03 | X1.0 |
| Last M-flare | 2026/06/03 | M7.9 |
| 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 |
| June 2026 | 144.3 +65 |
| Last 30 days | 99 +5.2 |
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