Viewing archive of Wednesday, 12 May 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 May 12 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 133 Issued at 2200Z on 12 May 2004IA. Analysis of Solar Active Regions and Activity from 11-2100Z to 12-2100Z Solar activity has been mostly very low to low. Region
609 (S04E41) generated a single C1.3 x-ray event on 12 May at 1543
UTC. Two new regions 610 (S02E19) and 611 (S12W14) were numbered
today.
IB. Solar Activity Forecast
Solar activity is expected to remain
very low to low. There's a chance for isolated C-class x-ray
activity.
IIA. Geophysical Activity Summary 11-2100Z to 12-2100Z
The geomagnetic field has been at mostly quiet to unsettled levels
with a period of active levels from 12 May at 0300 through 0600 UTC.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet to unsettled levels with isolated periods of
active for 13 May. From 14 through 15 May, the activity should
increase to mostly unsettled with periods of active to minor
storming due to the influence of a high-speed solar wind stream, and
the possible effects of an interplanetary transient.
III. Event Probabilities 13 May to 15 May
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 12 May 099 Predicted 13 May-15 May 095/100/100 90 Day Mean 12 May 105
V. Geomagnetic A Indices
Observed Afr/Ap 11 May 008/010 Estimated Afr/Ap 12 May 012/012 Predicted Afr/Ap 13 May-15 May 010/010-012/015-012/015
VI. Geomagnetic Activity Probabilities 13 May to 15 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 30% | 30% |
| Minor storm | 10% | 15% | 15% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 35% | 35% |
| Minor storm | 15% | 20% | 20% |
| Major-severe storm | 01% | 05% | 05% |
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