Viewing archive of Sunday, 18 March 2001
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 2001 Mar 18 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 077 Issued at 2200Z on 18 Mar 2001IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z Solar activity was low. Region 9373 (S07W43) produced
several small C-class flares. One flare at 18/0850 UTC was an C3/1f
with an associated Type II radio sweep. This region continues to
increase in size, spot count, and maintains a beta-gamma magnetic
classification. New Region 9386 (N03W11) was numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be low.
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
The geomagnetic field was quiet to unsettled.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled. Isolated active periods are
possible for 19 and 20 March due to the CME which occurred late on
15 March.
III. Event Probabilities 19 Mar to 21 Mar
| Class M | 25% | 25% | 25% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 18 Mar 140 Predicted 19 Mar-21 Mar 135/130/135 90 Day Mean 18 Mar 160
V. Geomagnetic A Indices
Observed Afr/Ap 17 Mar 002/004 Estimated Afr/Ap 18 Mar 008/008 Predicted Afr/Ap 19 Mar-21 Mar 015/015-015/010-008/005
VI. Geomagnetic Activity Probabilities 19 Mar to 21 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 10% |
| Minor storm | 10% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 15% |
| Minor storm | 10% | 10% | 05% |
| Major-severe storm | 05% | 05% | 01% |
All times in UTC
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