Viewing archive of Friday, 26 March 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 Mar 26 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 086 Issued at 2200Z on 26 Mar 2004IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z Solar activity decreased to very low levels. Region
582 (N16E59) continued to show growth in sunspot coverage and
magnetic complexity. Although, this region was limited to minor
B-class flare production today. Region 574 (S04W65) has undergone
steady decay throughout the period. Region 578 (N15W34) showed a
slight decay in sunspot coverage. Region 581 (S03E53) exhibited
grow and now has sunspots in both polarities. No new regions were
numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be at
low to moderate levels. Region 582 has the potential to produce an
M-class flare.
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
The geomagnetic field was at predominantly quiet to unsettled levels.
An isolated active period was observed at the Boulder magnetometer
between 26/1500 and 1800Z. The greater than 2 MeV electron fluxes
at geosynchronous orbit reached high levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at predominantly unsettled to active levels. A
recurrent high speed coronal hole stream is expected to be
geo-effective throughout the period with isolated minor storm
conditions possible, mostly at higher latitudes.
III. Event Probabilities 27 Mar to 29 Mar
| Class M | 50% | 50% | 50% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 26 Mar 124 Predicted 27 Mar-29 Mar 125/120/115 90 Day Mean 26 Mar 110
V. Geomagnetic A Indices
Observed Afr/Ap 25 Mar 003/008 Estimated Afr/Ap 26 Mar 008/010 Predicted Afr/Ap 27 Mar-29 Mar 010/015-010/015-010/015
VI. Geomagnetic Activity Probabilities 27 Mar to 29 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 30% |
| Minor storm | 20% | 20% | 20% |
| Major-severe storm | 05% | 05% | 05% |
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