:Product: 0726RSGA.txt
:Issued: 2010 Jul 26 2200 UTC
# Prepared jointly by the U.S. Dept. of Commerce, NOAA,
# Space Weather Prediction Center and the U.S. Air Force.
#
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 207 Issued at 2200Z on 26 Jul 2010
IA.  Analysis of Solar Active Regions and Activity from  25/2100Z
to 26/2100Z:  Solar activity remained very low. Region 1089 (S24W21)
produced occasional B-class flares as it continued to gradually
decay. Region 1090 (N22E29) and newly numbered Region 1091 (N12W73)
were both simple, single-spot A-type groups.
IB.  Solar Activity Forecast:  Solar activity is expected to be very
low through the period. However, there is a slight chance for an
isolated C-class flare from Region 1089.
IIA.  Geophysical Activity Summary 25/2100Z to 26/2100Z:
Geomagnetic field activity was at quiet levels. Despite the quiet
conditions, Earth remained within a recurrent coronal hole
high-speed wind stream. ACE solar wind readings indicated velocities
varied from 396 to 459 km/s during the period with no discernible
trend.
IIB.  Geophysical Activity Forecast:  Geomagnetic field activity is
expected to increase to quiet to active levels with a slight chance
for a minor storm on day 1 (27 July) as the current coronal hole
high-speed stream intensifies. Activity is expected to decrease to
quiet to unsettled levels during days 2 - 3 (28 - 29 July) as the
high-speed stream gradually subsides.
III.  Event Probabilities 27 Jul-29 Jul
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       Green
IV.  Penticton 10.7 cm Flux
Observed           26 Jul 084
Predicted   27 Jul-29 Jul  084/084/084
90 Day Mean        26 Jul 075
V.  Geomagnetic A Indices
Observed Afr/Ap 25 Jul  005/006
Estimated Afr/Ap 26 Jul  005/009
Predicted Afr/Ap 27 Jul-29 Jul  012/015-008/010-007/008
VI.  Geomagnetic Activity Probabilities 27 Jul-29 Jul
A.  Middle Latitudes
Active                25/15/10
Minor storm           10/05/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                30/20/15
Minor storm           15/05/05
Major-severe storm    05/01/01