Viewing archive of Wednesday, 26 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 26 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 086 Issued at 2200Z on 26 Mar 2008IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z Solar activity was very low. Region 987 (S08E08) and
988 (S08E33) have remained fairly stable and both retain their beta
magnetic configuration. Region 989 (S10E62) has also been stable,
however, it remains too close to the limb for determining the
magnetic classification.
IB. Solar Activity Forecast
Solar activity is expected to be very
low to low. Region 987, 988, and 989 are capable of producing
C-class flares. An M-class event is possible from Region 989.
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
The geomagnetic field was at quiet to minor storm conditions due to
the influence of a recurrent coronal hole high speed stream. Solar
wind observations at the ACE spacecraft increased from an average
around 370 km/s to a maximum of 602 at 26/1429Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at unsettled to active levels with isolated minor
storm conditions for 27 March due to the coronal hole high speed
stream. Isolated periods of major storm conditions are possible at
high latitudes. Unsettled to isolated active conditions are
expected for 28-29 March.
III. Event Probabilities 27 Mar to 29 Mar
| Class M | 50% | 50% | 50% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 26 Mar 082 Predicted 27 Mar-29 Mar 090/095/095 90 Day Mean 26 Mar 072
V. Geomagnetic A Indices
Observed Afr/Ap 25 Mar 003/004 Estimated Afr/Ap 26 Mar 020/020 Predicted Afr/Ap 27 Mar-29 Mar 020/025-015/015-010/010
VI. Geomagnetic Activity Probabilities 27 Mar to 29 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 25% | 15% |
| Minor storm | 15% | 10% | 05% |
| Major-severe storm | 10% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 35% | 30% | 20% |
| Minor storm | 20% | 15% | 10% |
| Major-severe storm | 15% | 10% | 05% |
All times in UTC
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