Viewing archive of Friday, 25 May 2001
Solar activity report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2001 May 25 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 145 Issued at 2200Z on 25 May 2001IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z Solar activity was low. The largest flare of the past
day was a C5 at 25/1937 UTC which occurred in conjunction with
optical flares in Regions 9463 (N08W23) and 9468 (N07E12). Both of
these sunspot groups were responsible for other, smaller x-ray
flares as well. Other disk regions were relatively quiet.
IB. Solar Activity Forecast
Solar activity is expected to be low
to moderate. Additional C-class flares are likely and an isolated
M-class flare is possible. Regions 9463 and 9468 are the most
probable sources of activity.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic field ranged from quiet to active levels.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled.
III. Event Probabilities 26 May to 28 May
| Class M | 30% | 30% | 30% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 25 May 162 Predicted 26 May-28 May 160/160/155 90 Day Mean 25 May 168
V. Geomagnetic A Indices
Observed Afr/Ap 24 May 007/009 Estimated Afr/Ap 25 May 008/008 Predicted Afr/Ap 26 May-28 May 008/008-015/015-010/018
VI. Geomagnetic Activity Probabilities 26 May to 28 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 01% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 20% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 02% | 02% |
All times in UTC
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