Viewing archive of Saturday, 29 March 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 Mar 29 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 089 Issued at 2200Z on 29 Mar 2008IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z Solar activity was very low. The three spotted regions
on the disk, 987 (S06W31), 988 (S08W06), and 989 (S12E23) were all
generally stable and quiet during the past 24 hours.
IB. Solar Activity Forecast
Solar activity is expected to be very
low. There is a chance, however, for an isolated C-class event
during the next three days (30 March - 01 April).
IIA. Geophysical Activity Summary 28-2100Z to 29-2100Z
The geomagnetic field was quiet to unsettled. Solar wind speed as
measured at ACE showed a downward trend during the period which is
indicative of the decline of the high speed solar wind stream;
day-end values were around 550 km/s. The greater than 2 MeV electron
flux at geosynchronous orbit reached very high levels during the
past 24 hours.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled for the first day (30 March) and
is expected to be predominantly quiet for the second and third days
(31 March - 01 April).
III. Event Probabilities 30 Mar to 01 Apr
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 29 Mar 083 Predicted 30 Mar-01 Apr 080/080/080 90 Day Mean 29 Mar 073
V. Geomagnetic A Indices
Observed Afr/Ap 28 Mar 013/021 Estimated Afr/Ap 29 Mar 010/010 Predicted Afr/Ap 30 Mar-01 Apr 008/010-005/005-005/008
VI. Geomagnetic Activity Probabilities 30 Mar to 01 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 10% | 10% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 15% | 15% |
| Minor storm | 15% | 05% | 05% |
| Major-severe storm | 05% | 01% | 01% |
All times in UTC
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