Viewing archive of Wednesday, 30 April 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 Apr 30 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 121 Issued at 2200Z on 30 Apr 2008IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z Solar activity was very low. No flares were observed
during the past 24 hours.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
The geomagnetic field was quiet to unsettled. The greater than 2 MeV
electron flux at geosynchronous orbit reached high levels during the
past 24 hours.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled with isolated active periods for
the next three days (01-03 May). Elevated activity expected on day
one is in response to the CME observed on 26 April. Activity on days
two and three is in response to a recurrent coronal hole high speed
stream that is expected to rotate into a geoeffective position.
III. Event Probabilities 01 May to 03 May
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 30 Apr 067 Predicted 01 May-03 May 070/070/070 90 Day Mean 30 Apr 071
V. Geomagnetic A Indices
Observed Afr/Ap 29 Apr 004/008 Estimated Afr/Ap 30 Apr 010/010 Predicted Afr/Ap 01 May-03 May 010/015-010/010-010/010
VI. Geomagnetic Activity Probabilities 01 May to 03 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 30% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 50% | 40% | 40% |
| Minor storm | 15% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
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