Viewing archive of Thursday, 5 June 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Jun 05 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 156 Issued at 2200Z on 05 Jun 2025IA. Analysis of Solar Active Regions and Activity from 04-2100Z to 05-2100Z Solar activity has been at moderate 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 (06 Jun, 07 Jun,
08 Jun).
IIA. Geophysical Activity Summary 04-2100Z to 05-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 765 km/s at 04/2240Z. Total IMF reached 8
nT at 04/2114Z. The maximum southward component of Bz reached -3 nT at
05/1706Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 2215 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and three (06 Jun, 08 Jun)
and quiet to minor storm levels on day two (07 Jun).
III. Event Probabilities 06 Jun to 08 Jun
| Class M | 40% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 05 Jun 128 Predicted 06 Jun-08 Jun 128/128/125 90 Day Mean 05 Jun 153
V. Geomagnetic A Indices
Observed Afr/Ap 04 Jun 017/ 026 Estimated Afr/Ap 05 Jun 010/014 Predicted Afr/Ap 06 Jun-08 Jun 014/015-014/018-014/015
VI. Geomagnetic Activity Probabilities 06 Jun to 08 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 35% | 35% |
| Minor storm | 15% | 25% | 15% |
| Major-severe storm | 01% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 15% |
| Minor storm | 30% | 25% | 30% |
| Major-severe storm | 50% | 60% | 50% |
All times in UTC
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