Viewing archive of Sunday, 2 January 2005
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 2005 Jan 02 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 002 Issued at 2200Z on 02 Jan 2005IA. Analysis of Solar Active Regions and Activity from 01-2100Z to 02-2100Z Solar activity was low. Isolated low C-class and
B-class flares occurred in Region 715 (N05E08). Region 715, which
produced an X1 flare on 01 January, continues in a decay phase.
Region 717 (N08W86) is growing in size as it approaches the west
limb, but so far has produced only B-class activity. No other
significant activity or changes were observed.
IB. Solar Activity Forecast
Solar activity is expected to be low
to moderate. There is a small chance for an M-class flare from
Region 715. Isolated C-class flares are possible from Region 717 as
it rotates around the west limb.
IIA. Geophysical Activity Summary 01-2100Z to 02-2100Z
The geomagnetic field was at unsettled to minor storm levels. High
speed coronal hole flow, possibly combined with weak transient flow
from the late December CME activity, is responsible for this
disturbance. Solar wind speed increased to over 800 km/s by the
middle of the period and ranged from 700 - 850 km/s for the
remainder of the day.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to range from quiet to major storming. The high speed
coronal hole stream in progress now is expected to persist through
03 January. A CME associated with the X1 flare early on 01 Jan is
expected to impact the geomagnetic field on 03 January. As a result,
minor to major storm periods are possible on 03 and 04 January.
Storming should subside by 05 January. Expect quiet to unsettled
levels with isolated active periods on the 5th.
III. Event Probabilities 03 Jan to 05 Jan
| Class M | 30% | 25% | 20% |
| Class X | 05% | 05% | 01% |
| Proton | 05% | 05% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 02 Jan 100 Predicted 03 Jan-05 Jan 095/095/090 90 Day Mean 02 Jan 105
V. Geomagnetic A Indices
Observed Afr/Ap 01 Jan 010/015 Estimated Afr/Ap 02 Jan 020/025 Predicted Afr/Ap 03 Jan-05 Jan 020/030-015/015-010/010
VI. Geomagnetic Activity Probabilities 03 Jan to 05 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 50% | 35% | 25% |
| Minor storm | 25% | 15% | 05% |
| Major-severe storm | 10% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 50% | 40% | 30% |
| Minor storm | 30% | 20% | 10% |
| Major-severe storm | 20% | 10% | 05% |
All times in UTC
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