Viewing archive of Wednesday, 25 June 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Jun 25 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 176 Issued at 2200Z on 25 Jun 2025IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z 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 (26 Jun, 27 Jun,
28 Jun).
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 505 km/s at 25/2059Z. Total IMF reached 16
nT at 25/2012Z. The maximum southward component of Bz reached -11 nT at
25/2027Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 1260 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to minor storm levels on day one (26 Jun), quiet to
minor storm levels on day two (27 Jun) and quiet to active levels on day
three (28 Jun).
III. Event Probabilities 26 Jun to 28 Jun
| Class M | 30% | 35% | 35% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 25 Jun 117 Predicted 26 Jun-28 Jun 120/125/130 90 Day Mean 25 Jun 145
V. Geomagnetic A Indices
Observed Afr/Ap 24 Jun 009/ 012 Estimated Afr/Ap 25 Jun 015/020 Predicted Afr/Ap 26 Jun-28 Jun 023/032-017/020-011/014
VI. Geomagnetic Activity Probabilities 26 Jun to 28 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 35% | 30% |
| Minor storm | 30% | 20% | 10% |
| Major-severe storm | 10% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 25% | 25% | 25% |
| Major-severe storm | 65% | 55% | 40% |
All times in UTC
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Space weather facts
| Last X-flare | 2025/12/01 | X1.9 |
| Last M-flare | 2025/12/06 | M8.1 |
| Last geomagnetic storm | 2025/12/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 167.7 +75.9 |
| Last 30 days | 107.1 +13.7 |