Viewing archive of Thursday, 29 May 2008
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 2008 May 29 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 150 Issued at 2200Z on 29 May 2008IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z Solar activity was at very low levels. The visible
disk remained spotless.
IB. Solar Activity Forecast
Solar activity is expected to remain
at very low levels.
IIA. Geophysical Activity Summary 28-2100Z to 29-2100Z
The geomagnetic field was at mostly quiet levels. Solar wind
velocities began the summary period at about 550 km/s, but by
29/0200Z had decayed slightly, however still remained elevated
between 450 - 500 km/s.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet to unsettled levels, with a chance for
isolated active periods, during all three days of the forecast
period (30 May - 01 Jun) due to the high speed stream.
III. Event Probabilities 30 May to 01 Jun
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 29 May 068 Predicted 30 May-01 Jun 068/068/068 90 Day Mean 29 May 071
V. Geomagnetic A Indices
Observed Afr/Ap 28 May 010/012 Estimated Afr/Ap 29 May 008/010 Predicted Afr/Ap 30 May-01 Jun 008/010-008/008-008/010
VI. Geomagnetic Activity Probabilities 30 May to 01 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 25% | 30% |
| Minor storm | 10% | 05% | 10% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
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