Viewing archive of Monday, 7 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 07 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 098 Issued at 2200Z on 07 Apr 2008IA. Analysis of Solar Active Regions and Activity from 06-2100Z to 07-2100Z Solar activity was very low. No flares were observed
during the past 24 hours. No new regions were numbered.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 06-2100Z to 07-2100Z
The geomagnetic field ranged from quiet to active conditions due to
the continued effects of the high speed stream. Solar wind
measurements from the ACE satellite ranged from 546 km/sec to 677
km/sec, and Bz varied from -4.9 nT to 5.1 nT throughout the period.
The 2 MeV electron flux at geosynchronous orbit reached high levels
during the past 24 hours.
IIB. Geophysical Activity Forecast
The geomagnetic filed is
expected to be quiet to unsettled with isolated active periods for
the next three days (08-10 April). Isolated minor storm conditions
are possible at high latitudes due the continued effects of the
coronal hole.
III. Event Probabilities 08 Apr to 10 Apr
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 07 Apr 069 Predicted 08 Apr-10 Apr 070/070/070 90 Day Mean 07 Apr 072
V. Geomagnetic A Indices
Observed Afr/Ap 06 Apr 011/018 Estimated Afr/Ap 07 Apr 006/012 Predicted Afr/Ap 08 Apr-10 Apr 010/010-010/010-010/010
VI. Geomagnetic Activity Probabilities 08 Apr to 10 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 25% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 35% | 35% | 35% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
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