:Product: 19990423RSGA.txt
:Issued: 1999 Apr 23 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 113 ISSUED AT 2200Z ON 23 APR 1999
IA.  ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM  22/2100Z
TO 23/2100Z:  SOLAR ACTIVITY WAS VERY LOW. NO FURTHER DEVELOPMENT WAS
OBSERVED IN REGION 8518 (S14W10) WHICH HAS NOW STABILIZED AS AN
E-TYPE BETA GROUP. OCCASIONAL SURGING AND POINT BRIGHTENINGS WERE
ALSO NOTED IN THIS REGION THROUGHOUT THE PERIOD. NEW REGION 8522
(N16E63) WAS NUMBERED TODAY. REMAINING REGIONS WERE QUIET.
IB.  SOLAR ACTIVITY FORECAST:  SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW TO LOW. REGION 8518 APPEARS TO BE THE ONLY REGION CAPABLE OF
C-CLASS ACTIVITY.
IIA.  GEOPHYSICAL ACTIVITY SUMMARY FROM 22/2100Z TO 23/2100Z:
THE GEOMAGNETIC FIELD WAS QUIET
IIB.  GEOPHYSICAL ACTIVITY FORECAST:  THE GEOMAGNETIC FIELD IS
EXPECTED TO REMAIN QUIET
III.  EVENT PROBABILITIES 24 APR-26 APR
CLASS M    05/05/05
CLASS X    01/01/01
PROTON     01/01/01
PCAF       GREEN
IV.  PENTICTON 10.7 CM FLUX
OBSERVED           23 APR 098
PREDICTED   24 APR-26 APR  100/100/100
90 DAY MEAN        23 APR 130
V.  GEOMAGNETIC A INDICES
OBSERVED AFR/AP 22 APR  002/004
ESTIMATED AFR/AP 23 APR  006/007
PREDICTED AFR/AP 24 APR-26 APR  007/010-010/010-010/010
VI.  GEOMAGNETIC ACTIVITY PROBABILITIES 24 APR-26 APR
A.  MIDDLE LATITUDES
ACTIVE                10/15/15
MINOR STORM           05/05/05
MAJOR-SEVERE STORM    01/01/01
B.  HIGH LATITUDES
ACTIVE                15/20/20
MINOR STORM           05/05/05
MAJOR-SEVERE STORM    01/01/01