Viewing archive of Friday, 28 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 28 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 088 Issued at 2200Z on 28 Mar 2008IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z Solar activity was very low. Region 987 (S08W18), 988
(S08E07), and 989 (S12E36) have shown little change and retain their
beta magnetic configuration.
IB. Solar Activity Forecast
Solar activity is expected to be very
low to low. There is a chance of a C-class event from any of the
three numbered regions on the disk.
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
The geomagnetic field was at unsettled to minor storm levels due to
the continued influence of the recurrent coronal hole high speed
stream. Solar wind speed at the ACE spacecraft is averaging around
640 km/s. The greater than 2MeV electron flux at geosynchronous
orbit was at high levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be unsettled with isolated active conditions for 29-30
March. Predominately quiet levels are expected for 31 March as the
high speed stream rotates out of a geoeffective position.
III. Event Probabilities 29 Mar to 31 Mar
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 28 Mar 083 Predicted 29 Mar-31 Mar 085/085/080 90 Day Mean 28 Mar 073
V. Geomagnetic A Indices
Observed Afr/Ap 27 Mar 019/031 Estimated Afr/Ap 28 Mar 018/020 Predicted Afr/Ap 29 Mar-31 Mar 010/010-008/010-005/005
VI. Geomagnetic Activity Probabilities 29 Mar to 31 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 10% |
| Minor storm | 10% | 10% | 05% |
| Major-severe storm | 05% | 05% | 01% |
All times in UTC
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