Viewing archive of Sunday, 6 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 06 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 097 Issued at 2200Z on 06 Apr 2008IA. Analysis of Solar Active Regions and Activity from 05-2100Z to 06-2100Z Solar activity was very low. No significant flares
were observed during the past 24 hours. Region 989 (S11W80) remains
spotless. No new regions were numbered.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 05-2100Z to 06-2100Z
The geomagnetic field ranged from quiet to minor storm levels due to
the influence of a recurrent coronal hole high speed stream. Solar
wind speeds at the ACE spacecraft ranged from 526 km/sec to a peak
of 763 km/sec at 06/0858Z. Bz reached a minimum of -5.3 nT at
05/2257Z. The greater than 2MeV electron flux reached high levels
today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be mostly unsettled to active with isolated minor storm
periods at high latitudes on day one (07 April), due to the
continued effects from the high speed stream. Conditions are
expected to become mostly quiet to unsettled, with isolated active
periods, on days two and three (08-09 April).
III. Event Probabilities 07 Apr to 09 Apr
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 06 Apr 069 Predicted 07 Apr-09 Apr 070/070/070 90 Day Mean 06 Apr 072
V. Geomagnetic A Indices
Observed Afr/Ap 05 Apr 009/021 Estimated Afr/Ap 06 Apr 013/020 Predicted Afr/Ap 07 Apr-09 Apr 010/015-010/012-010/012
VI. Geomagnetic Activity Probabilities 07 Apr to 09 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 25% | 25% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 40% | 35% | 35% |
| Minor storm | 15% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
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