Viewing archive of Tuesday, 27 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 27 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 148 Issued at 2200Z on 27 May 2008IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z Solar activity was at very low levels. The visible
disk was spotless.
IB. Solar Activity Forecast
Solar activity is expected to remain
at very low levels.
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
The geomagnetic field was at quiet levels. The greater than 2 MeV
electron flux at geosynchronous orbit reached high levels again
today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at mostly quiet levels for day one (28 May).
Activity is expected to increase to quiet to unsettled levels with a
slight chance for isolated active periods on days two and three (29
and 30 May). The increase in activity is forecast due to a
recurrent coronal high speed stream that is expected to rotate into
a geoeffective position.
III. Event Probabilities 28 May to 30 May
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 27 May 068 Predicted 28 May-30 May 068/068/068 90 Day Mean 27 May 071
V. Geomagnetic A Indices
Observed Afr/Ap 26 May 003/004 Estimated Afr/Ap 27 May 005/005 Predicted Afr/Ap 28 May-30 May 005/005-008/010-008/010
VI. Geomagnetic Activity Probabilities 28 May to 30 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 30% | 30% |
| Minor storm | 05% | 10% | 10% |
| Major-severe storm | 01% | 05% | 05% |
All times in UTC
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