Viewing archive of Tuesday, 30 April 2002
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 2002 Apr 30 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 120 Issued at 2200Z on 30 Apr 2002IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z Solar activity was moderate. An M1 flare occurred at
30/0822 UTC. The source of this event seems to be just beyond the
southeast limb. Several C-class flares also occurred during the past
24 hours. Sources included disk Regions 9914 (N05W80), 9919
(N14W28), and probably one or more unnumbered east limb regions. New
Region 9929 (N22E16) emerged on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low
to moderate. A general trend of increased activity is expected as
the east limb regions rotate onto the disk.
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
The geomagnetic field was quiet to unsettled.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled.
III. Event Probabilities 01 May to 03 May
| Class M | 30% | 40% | 50% |
| Class X | 01% | 01% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 30 Apr 153 Predicted 01 May-03 May 155/160/165 90 Day Mean 30 Apr 192
V. Geomagnetic A Indices
Observed Afr/Ap 29 Apr 006/009 Estimated Afr/Ap 30 Apr 008/008 Predicted Afr/Ap 01 May-03 May 005/006-008/012-008/012
VI. Geomagnetic Activity Probabilities 01 May to 03 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
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