Viewing archive of Saturday, 31 March 2007
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 2007 Mar 31 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 090 Issued at 2200Z on 31 Mar 2007IA. Analysis of Solar Active Regions and Activity from 30-2100Z to 31-2100Z Solar activity was very low. Region 949 (N06E21)
produced today's only flare event, a B2/Sf at 0143Z. The region is a
small, C-type group. The remainder of the disk is spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 30-2100Z to 31-2100Z
The geomagnetic field was quiet during the past 24 hours.
IIB. Geophysical Activity Forecast
The geomagnetic field should be
initially quiet tomorrow (1 April). However, late in the day an
increase to unsettled to active is expected to begin and to continue
through 2-3 April in response to a favorably positioned coronal
hole.
III. Event Probabilities 01 Apr to 03 Apr
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 31 Mar 073 Predicted 01 Apr-03 Apr 073/073/073 90 Day Mean 31 Mar 078
V. Geomagnetic A Indices
Observed Afr/Ap 30 Mar 003/004 Estimated Afr/Ap 31 Mar 005/005 Predicted Afr/Ap 01 Apr-03 Apr 007/010-015/025-012/015
VI. Geomagnetic Activity Probabilities 01 Apr to 03 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 30% | 30% |
| Minor storm | 10% | 20% | 20% |
| Major-severe storm | 01% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 35% | 35% |
| Minor storm | 15% | 25% | 25% |
| Major-severe storm | 05% | 10% | 10% |
All times in UTC
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