Viewing archive of Monday, 13 May 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 May 13 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 133 Issued at 2200Z on 13 May 2002IA. Analysis of Solar Active Regions and Activity from 12-2100Z to 13-2100Z Solar activity was at low levels. Region 9934 (S16W84)
produced a C3/Sf flare at 13/0101 UTC. Region 9934 maintains its
beta-gamma-delta configuration as it transits beyond the west limb.
Region 9937 (S07W64) has simplified in magnetic complexity to a beta
configuration. Region 9948 (S22E38) remains relatively stable with
only a slight decrease in area coverage. SOHO/LASCO C2 imagery
revealed a CME off the NE limb at approximately 13/1100 UTC.
Analysis of this event indicates a probable source beyond the NE
limb. One new region was numbered today: Region 9952 (S15W22).
IB. Solar Activity Forecast
Solar activity is expected to be low
to moderate. Region 9934 has the potential for M-class events.
Region 9948 also has a slight chance of M-class activity.
IIA. Geophysical Activity Summary 12-2100Z to 13-2100Z
The geomagnetic field was at quiet to unsettled levels with one three
hour period of active conditions (00-03 UTC). Greater than 2 MeV
electrons at geosynchronous orbit reached moderate levels with a
maximum value of 783 pfu at 13/1525 UTC.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled. Isolated active conditions are
possible on day one of the period due to effects from the M1 event
on 11 May. Enhanced greater than 2 MeV electrons are possible on
day one of the forecast period.
III. Event Probabilities 14 May to 16 May
| Class M | 45% | 40% | 35% |
| Class X | 05% | 05% | 01% |
| Proton | 05% | 05% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 13 May 172 Predicted 14 May-16 May 175/170/170 90 Day Mean 13 May 186
V. Geomagnetic A Indices
Observed Afr/Ap 12 May 013/019 Estimated Afr/Ap 13 May 010/012 Predicted Afr/Ap 14 May-16 May 012/015-010/012-008/010
VI. Geomagnetic Activity Probabilities 14 May to 16 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 20% | 15% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 02% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 25% | 20% |
| Minor storm | 15% | 10% | 05% |
| Major-severe storm | 05% | 05% | 01% |
All times in UTC
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