:Product: 0426RSGA.txt
:Issued: 2010 Apr 26 2201 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 116 Issued at 2200Z on 26 Apr 2010
IA.  Analysis of Solar Active Regions and Activity from  25/2100Z
to 26/2100Z:  Solar activity was very low.  No flares were observed
during the past 24 hours and the disk remained spotless.
IB.  Solar Activity Forecast:  Solar activity is expected to remain
very low for the next three days (27-29 April).
IIA.  Geophysical Activity Summary 25/2100Z to 26/2100Z:
The geomagnetic field was quiet during the past 24 hours.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be quiet to unsettled with isolated active periods at
high latitudes on day 1 (27 April) due to possible effects of a CME
observed on 22 April and a coronal hole high speed stream rotating
into a geoeffective position.  Quiet to unsettled conditions are
expected on day two (28 April) due to a second coronal hole high
speed stream rotating into a geoeffective position.  Conditions are
expected to be quiet on day three (29 April).
III.  Event Probabilities 27 Apr-29 Apr
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       green
IV.  Penticton 10.7 cm Flux
Observed           26 Apr 076
Predicted   27 Apr-29 Apr  076/076/078
90 Day Mean        26 Apr 081
V.  Geomagnetic A Indices
Observed Afr/Ap 25 Apr  002/003
Estimated Afr/Ap 26 Apr  004/004
Predicted Afr/Ap 27 Apr-29 Apr  008/010-007/008-005/005
VI.  Geomagnetic Activity Probabilities 27 Apr-29 Apr
A.  Middle Latitudes
Active                15/10/05
Minor storm           05/05/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                20/15/05
Minor storm           10/05/01
Major-severe storm    01/01/01