Viewing archive of Sunday, 15 July 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 Jul 15 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 196 Issued at 2200Z on 15 Jul 2001IA. Analysis of Solar Active Regions and Activity from 14-2100Z to 15-2100Z Solar activity was moderate due to a single M-class
event during the period. Region 9539 (S18W15) produced an M1/Sf
flare at 14/2133 UTC. Region 9539 was by far, the most active region
on the visible disk. It also produced a C7/1f flare and a C6/Sf
flare during the period. This regions rapid growth has somewhat
stabilized for the time being. However, it continues to posses a
beta-gamma magnetic classification. Other regions of note were 9533
(S08W54) and newly numbered regions 9542 (N06E66) and 9543 (S24E71),
all of which produced optical subflares during the period.
IB. Solar Activity Forecast
Solar activity is expected to be at
mostly low levels. Region 9539 is capable of producing isolated
M-class events.
IIA. Geophysical Activity Summary 14-2100Z to 15-2100Z
The geomagnetic field was at quiet to active levels.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet to active levels during the first two days
of the forecast period, due to possible coronal hole effects.
Conditions should subside to quiet to unsettled levels on the third
day.
III. Event Probabilities 16 Jul to 18 Jul
| Class M | 20% | 20% | 20% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 15 Jul 142 Predicted 16 Jul-18 Jul 140/145/145 90 Day Mean 15 Jul 159
V. Geomagnetic A Indices
Observed Afr/Ap 14 Jul 013/013 Estimated Afr/Ap 15 Jul 010/012 Predicted Afr/Ap 16 Jul-18 Jul 012/013-012/013-008/010
VI. Geomagnetic Activity Probabilities 16 Jul to 18 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 20% |
| Minor storm | 10% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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