Viewing archive of Monday, 29 August 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 Aug 29 2204 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 241 Issued at 2200Z on 29 Aug 2005IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z
Solar activity decreased to low levels. Region 803
(N11E14) continues to decay and was limited to minor B-class flare
activity. The delta structure seen yesterday has eroded away
although gamma structures remain evident. New Region 806 (S17E50)
emerged today and produced the largest flare of the period, a C1
x-ray flare occurring at 29/1703Z. This regions appears to have
beta-gamma magnetic characteristics. A full halo CME was observed
on LASCO imagery beginning at 29/1054Z, it has been determined to be
a back-sided event.
IB. Solar Activity Forecast
Solar activity is expected to be at
low levels.
IIA. Geophysical Activity Summary 28-2100Z to 29-2100Z
The geomagnetic field was at predominantly quiet to unsettled levels.
Active conditions were observed between 29/0300 and 0600Z following
several hours of sustained southward Bz. The greater than 2 MeV
electron flux at geosynchronous orbit reached high levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet to unsettled levels on 30-31 August. Active
conditions are possible on 01 September due to the onset of a
coronal hole.
III. Event Probabilities 30 Aug to 01 Sep
| Class M | 35% | 35% | 35% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 29 Aug 089 Predicted 30 Aug-01 Sep 090/090/085 90 Day Mean 29 Aug 093
V. Geomagnetic A Indices
Observed Afr/Ap 28 Aug 005/007 Estimated Afr/Ap 29 Aug 005/010 Predicted Afr/Ap 30 Aug-01 Sep 005/008-008/012-012/015
VI. Geomagnetic Activity Probabilities 30 Aug to 01 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 20% |
| Minor storm | 01% | 05% | 10% |
| Major-severe storm | 01% | 01% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 30% |
| Minor storm | 05% | 10% | 15% |
| Major-severe storm | 01% | 05% | 05% |
All times in UTC
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