Viewing archive of Saturday, 26 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 26 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 146 Issued at 2200Z on 26 May 2001IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z Solar activity was low. Region 9468 (N06W02) continued
to produce small C-class subflares, the largest being a C2/Sf at
25/2210 UTC. Other disk regions were relatively quiet. New Regions
numbered include 9473 (N12E12), 9474 (N18E53), and 9475 (N17E71).
All are small and magnetically simple.
IB. Solar Activity Forecast
Solar activity is expected to be low
to moderate. An isolated low-level M-class flare remains possible
from Region 9468. Additional C-class activity is likely.
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
The geomagnetic field was quiet to unsettled.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled.
III. Event Probabilities 27 May to 29 May
| Class M | 30% | 30% | 30% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 26 May 147 Predicted 27 May-29 May 145/140/140 90 Day Mean 26 May 169
V. Geomagnetic A Indices
Observed Afr/Ap 25 May 006/008 Estimated Afr/Ap 26 May 008/008 Predicted Afr/Ap 27 May-29 May 015/015-010/015-008/008
VI. Geomagnetic Activity Probabilities 27 May to 29 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 20% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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