Viewing archive of Tuesday, 7 December 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 Dec 07 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 342 Issued at 2200Z on 07 Dec 2004IA. Analysis of Solar Active Regions and Activity from 06-2100Z to 07-2100Z Solar activity was at very low levels. No new regions
were numbered today.
IB. Solar Activity Forecast
Solar activity is expected to remain
at very low levels.
IIA. Geophysical Activity Summary 06-2100Z to 07-2100Z
The geomagnetic field was at quiet to active levels. A period of
minor storm conditions did occur at high latitudes between 07/0300
and 0600Z and is believed to be in response to a waning coronal
hole. Solar wind velocity has been at or near 500 km/s throughout
most of the period. 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 predominantly quiet to unsettled levels throughout
the period with isolated active conditions possible on the first day
(8 Dec) as the geoeffective coronal hole rotates off the solar west
limb. The remainder of the period should return to quiet to
unsettled levels.
III. Event Probabilities 08 Dec to 10 Dec
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 07 Dec 090 Predicted 08 Dec-10 Dec 090/095/095 90 Day Mean 07 Dec 107
V. Geomagnetic A Indices
Observed Afr/Ap 06 Dec 011/019 Estimated Afr/Ap 07 Dec 009/015 Predicted Afr/Ap 08 Dec-10 Dec 008/015-008/010-008/008
VI. Geomagnetic Activity Probabilities 08 Dec to 10 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 25% | 20% |
| Minor storm | 10% | 10% | 05% |
| Major-severe storm | 05% | 05% | 01% |
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