:Product: 20040620RSGA.txt
:Issued: 2004 Jun 20 2200 UTC
# Prepared jointly by the U.S. Dept. of Commerce, NOAA,
# Space Environment Center and the U.S. Air Force.
#
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 172 Issued at 2200Z on 20 Jun 2004
IA.  Analysis of Solar Active Regions and Activity from  19/2100Z
to 20/2100Z:  Solar activity was at low levels today.  Region 635
(S12W01) produced several C-class flares during the period.  The
largest was a C2/Sf event that occurred at 20/1332Z.  There was
continued growth in the sunspot area, most notably around the
intermediate spots.  Region 635 continues to exhibit a delta
magnetic configuration in the trailing portion of the active region.
Region 634 (N12W18) was quiescent today with little change observed
over the period.  The large, lead asymmetrical spot continues to
display a delta magnetic structure.  New Region 636 (S10E30) was
numbered today.
IB.  Solar Activity Forecast:  Solar activity is expected to be at
low to moderate levels.  Regions 634 and 635 are capable of
producing M-class flare activity.
IIA.  Geophysical Activity Summary 19/2100Z to 20/2100Z:
The geomagnetic field was at quiet levels.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be at quiet to unsettled levels throughout the forecast
period.
III.  Event Probabilities 21 Jun-23 Jun
Class M    60/60/60
Class X    10/10/10
Proton     05/05/05
PCAF       green
IV.  Penticton 10.7 cm Flux
Observed           20 Jun 119
Predicted   21 Jun-23 Jun  120/115/115
90 Day Mean        20 Jun 102
V.  Geomagnetic A Indices
Observed Afr/Ap 19 Jun  004/005
Estimated Afr/Ap 20 Jun  003/005
Predicted Afr/Ap 21 Jun-23 Jun  004/005-004/008-004/008
VI.  Geomagnetic Activity Probabilities 21 Jun-23 Jun
A.  Middle Latitudes
Active                15/15/15
Minor storm           01/01/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/15/15
Minor storm           01/05/05
Major-severe storm    01/01/01