> /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
>
> PRELIMINARY DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY
>
> 27 APRIL, 2005
>
> /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
>
> (Based in-part on SEC Data.)
> (The final report will be released tommorrow.)
>
>
> PRELIMINARY SOLAR & GEOPHYSICAL INDICES FOR 27 APRIL, 2005
> ----------------------------------------------------------
>
> DRAO 10.7 cm Solar Flux at 18Z, 20Z, 22Z: N/A, N/A, N/A sfu.
> Predicted Solar Flux for Next 3 Days: 100, 100, 100.
> Average 90-day Solar Flux: 90.
> Current Middle Latitude A-Index: 3
> Current Boulder K-Indices: 1101 121*
> Current Planetary K-Indices: 1001 222*
> Boulder A-Index 3-Day Forecast: 3, 10, 8.
> Planetary A-Index 3-Day Forecast: 8, 10, 10.
>
>
> SYNOPSIS OF TODAYS ACTIVITY
> ---------------------------
>
> Solar activity decreased to very low levels. Region
> 756 (S06E42) was limited to the production of low level B-class
> flares during the period. Sunspot area underwent a rapid increase
> today with most the of growth being attributed to the southern delta
> structure. Further magnetic analysis indicates that there may be a
> delta structure just north of center in the trailing portion of the
> large spot. Plage fluctuations and surging have been reported
> throughout the period. Region 755 (S13W54) had several umbra
> re-emerge today and remains simply structured. No new regions were
> numbered today.
>
> Solar activity forecast: solar activity is expected to be at
> low levels. Region 756 has the capability of producing an isolated
> M-class flare.
>
> The geomagnetic field was at quiet levels again today.
>
> Geophysical activity forecast: the geomagnetic field is
> expected to be at quiet to unsettled levels. There is a slight
> chance that the partial halo cme observed on 25-26 april might
> produce isolated active conditions on 29 april.
>
> Event probabilities 28 apr-30 apr
>
> Class M 30/30/30
> Class X 01/01/01
> Proton 01/01/01
> PCAF green
>
> Geomagnetic activity probabilities 28 apr-30 apr
>
> A. Middle Latitudes
> Active 15/20/15
> Minor storm 01/05/05
> Major-severe storm 01/01/01
>
> B. High Latitudes
> Active 15/20/20
> Minor storm 05/05/05
> Major-severe storm 01/01/01
>
>
> ** End of Daily Report **
> _______________________________________________
73 & GUD DX,
Thomas F. Giella, KN4LF
Retired Space & Atmospheric Weather Forecaster
Plant City, FL, USA
Grid Square EL87WX
Lat & Long 27 58 33.6397 N 82 09 52.4052 W
kn4lf@arrl.net
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