Viewing archive of Sunday, 11 May 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 May 11 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 131 Issued at 2200Z on 11 May 2025IA. Analysis of Solar Active Regions and Activity from 10-2100Z to 11-2100Z Solar activity has been at low levels for the past 24 hours.
There are currently 6 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low on
days one, two, and three (12 May, 13 May, 14 May).
IIA. Geophysical Activity Summary 10-2100Z to 11-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 482 km/s at 10/2147Z. Total IMF reached 9
nT at 11/2006Z. The maximum southward component of Bz reached -8 nT at
11/1827Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 836 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one and three (12 May, 14
May) and quiet to active levels on day two (13 May).
III. Event Probabilities 12 May to 14 May
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 11 May 126 Predicted 12 May-14 May 125/120/120 90 Day Mean 11 May 165
V. Geomagnetic A Indices
Observed Afr/Ap 10 May 014/014 Estimated Afr/Ap 11 May 010/011 Predicted Afr/Ap 12 May-14 May 007/008-010/012-008/010
VI. Geomagnetic Activity Probabilities 12 May to 14 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 40% | 20% |
| Minor storm | 05% | 15% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 15% |
| Minor storm | 30% | 30% | 30% |
| Major-severe storm | 25% | 50% | 25% |
All times in UTC
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