Viewing archive of Friday, 30 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 30 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 151 Issued at 2200Z on 30 May 2008IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z 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 29-2100Z to 30-2100Z
The geomagnetic field was at quiet to unsettled levels. Solar wind
velocities peaked at 665 km/s at about 30/0400Z, and remained
elevated between 550 - 600 km/s for the balance of the period.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet to unsettled levels, with a chance for
isolated active periods, during days one and two (31 May - 01 Jun).
By day three (02 Jun), the geomagnetic field is expected to return
to mostly quiet levels.
III. Event Probabilities 31 May to 02 Jun
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 30 May 067 Predicted 31 May-02 Jun 068/068/068 90 Day Mean 30 May 071
V. Geomagnetic A Indices
Observed Afr/Ap 29 May 007/009 Estimated Afr/Ap 30 May 008/008 Predicted Afr/Ap 31 May-02 Jun 008/010-008/010-005/008
VI. Geomagnetic Activity Probabilities 31 May to 02 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 10% |
| Minor storm | 05% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 25% |
| Minor storm | 10% | 10% | 05% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
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