Viewing archive of Saturday, 24 May 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 May 24 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 144 Issued at 2200Z on 24 May 2025IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z Solar activity has been at moderate levels for the past 24
hours. There are currently 8 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 (25 May, 26 May,
27 May).
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 474 km/s at 24/0127Z. Total IMF reached 10 nT at
24/1600Z. The maximum southward component of Bz reached -6 nT at
24/1052Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 1268 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one, two, and three (25 May,
26 May, 27 May).
III. Event Probabilities 25 May to 27 May
| Class M | 25% | 25% | 25% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 24 May 130 Predicted 25 May-27 May 135/140/135 90 Day Mean 24 May 156
V. Geomagnetic A Indices
Observed Afr/Ap 23 May 008/007 Estimated Afr/Ap 24 May 007/008 Predicted Afr/Ap 25 May-27 May 009/008-009/008-008/008
VI. Geomagnetic Activity Probabilities 25 May to 27 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 25% | 25% |
| Major-severe storm | 30% | 30% | 30% |
All times in UTC
Latest news
Wednesday, 14 May 2025
Another X-flare! Potent sunspot region 4087!
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Latest forum messages
AR 14098 39Unspecified geomagnetic activity 2513Incoming & Unnumbered Active Regions 1914Strong far side CME 409Filaments and prominences 178
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Space weather facts
| Last X-flare | 2025/05/25 | X1.1 |
| Last M-flare | 2025/05/24 | M2.2 |
| Last geomagnetic storm | 2025/05/17 | Kp6+ (G2) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2025 | 140.6 +6.4 |
| May 2025 | 73.1 -67.5 |
| Last 30 days | 81.8 -37.6 |