Viewing archive of Wednesday, 17 November 2004
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 2004 Nov 17 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 322 Issued at 2200Z on 17 Nov 2004IA. Analysis of Solar Active Regions and Activity from 16-2100Z to 17-2100Z Solar activity decreased to very low levels today.
Region 700 (N04W80) was in steady decay today as it began to rotate
off the west solar limb. Flare production was limited to B-class
flare activity today. Region 702 (S10W27) is a rapidly developing
magnetic beta group that was numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be at
very low to low levels.
IIA. Geophysical Activity Summary 16-2100Z to 17-2100Z
The geomagnetic field was at quiet to unsettled levels today. An
isolated active period was observed at middle latitudes between
17/0600 and 0900Z. The greater than 2 MeV electron flux at
geosynchronous orbit reached high levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet to unsettled levels through 18 and 19
November. Isolated active conditions may occur on 20 November in
response to an anticipated coronal hole.
III. Event Probabilities 18 Nov to 20 Nov
| Class M | 10% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 17 Nov 105 Predicted 18 Nov-20 Nov 110/110/110 90 Day Mean 17 Nov 107
V. Geomagnetic A Indices
Observed Afr/Ap 16 Nov 005/008 Estimated Afr/Ap 17 Nov 004/007 Predicted Afr/Ap 18 Nov-20 Nov 004/008-002/008-008/012
VI. Geomagnetic Activity Probabilities 18 Nov to 20 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 20% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 25% |
| Minor storm | 05% | 05% | 10% |
| Major-severe storm | 01% | 01% | 05% |
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