Viewing archive of Wednesday, 13 February 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 Feb 13 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 044 Issued at 2200Z on 13 Feb 2002IA. Analysis of Solar Active Regions and Activity from 12-2100Z to 13-2100Z
Solar activity has been low. There were several C-class
events during the past 24 hours; most of these were from Region 9825
(N14E16). The largest event was a C7/1n from 9825 at 0712 UTC.
Region 9825 has grown steadily and is now the largest group on the
disk. Region 9821 (S13W53) is now the second largest region but is
decaying and did not produce any flare activity. A CME was observed
in C2 from the southeast limb, beginning at 2030 UTC: the CME does
not appear to be earthward directed.
IB. Solar Activity Forecast
Solar activity is expected to be
mostly low, but there is a fair chance for an isolated M-class
event, with Region 9825 being the main threat. There is a very
slight chance for a major flare or a proton producing flare.
IIA. Geophysical Activity Summary 12-2100Z to 13-2100Z
The geomagnetic field was mostly quiet to unsettled. The greater than
2 MeV electron fluxes were at moderate levels for a significant
fraction of the day.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be mostly unsettled for the next two days. Quiet to
unsettled levels are expected on the third day.
III. Event Probabilities 14 Feb to 16 Feb
| Class M | 50% | 50% | 50% |
| Class X | 10% | 10% | 10% |
| Proton | 05% | 05% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 13 Feb 204 Predicted 14 Feb-16 Feb 210/210/205 90 Day Mean 13 Feb 222
V. Geomagnetic A Indices
Observed Afr/Ap 12 Feb 005/006 Estimated Afr/Ap 13 Feb 012/012 Predicted Afr/Ap 14 Feb-16 Feb 010/010-010/008-007/008
VI. Geomagnetic Activity Probabilities 14 Feb to 16 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 20% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 20% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 01% |
All times in UTC
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