Viewing archive of Wednesday, 11 May 2005
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 2005 May 11 2320 UTC# Prepared jointly by the U.S. Dept. of Commerce, NOAA, #Space Environment Center and the U.S. Air Force. #
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 131 Issued at 2200Z on 11 May 2005IA. Analysis of Solar Active Regions and Activity from 10-2100Z to 11-2100Z Solar activity has been moderate. For 11 May, Region
758 (S10W55) generated an M1.2 at 0641Z, an M1.1/1F at 1938Z, and a
series of C-class events over the last 24 hours. This region
continues to maintain strong magnetic intensity, and has a good
potential for further activity. Regions 764 (S10E01) and 763
(S14E70) were newly numbered today, and Region 762 (S11E04) was
reclassified as two regions (Regions 762 and 764).
IB. Solar Activity Forecast
Solar activity is expected to be
moderate for the next three days. Regions 758 and 759 (N12E33)
continue to harbor a good potential for M-class activity with a
slight chance for a major or proton producing flare.
IIA. Geophysical Activity Summary 10-2100Z to 11-2100Z
The geomagnetic field has been at quiet to unsettled levels. The
greater than 2 MeV electron flux at geosynchronous orbits reached
high levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled for the next three days.
III. Event Probabilities 12 May to 14 May
| Class M | 65% | 65% | 65% |
| Class X | 15% | 15% | 15% |
| Proton | 15% | 15% | 15% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 11 May 125 Predicted 12 May-14 May 120/120/115 90 Day Mean 11 May 093
V. Geomagnetic A Indices
Observed Afr/Ap 10 May 006/010 Estimated Afr/Ap 11 May 008/010 Predicted Afr/Ap 12 May-14 May 005/010-005/008-005/008
VI. Geomagnetic Activity Probabilities 12 May to 14 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 20% | 20% |
| Minor storm | 15% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
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