:Product: 19970426RSGA.txt
:Issued: 1997 Apr 26 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 116 ISSUED AT 2200Z ON 26 APR 1997
IA.  ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM  25/2100Z
TO 26/2100Z:  SOLAR ACTIVITY WAS VERY LOW. HOWEVER, NEW GROWTH
OCCURRED IN REGION 8035 (N18E10), WHICH WAS IN A STATE OF DECAY
YESTERDAY. NEWLY ASSIGNED REGION 8036 (S18W36) EMERGED QUICKLY TO BE
A C-TYPE SUNSPOT GROUP. THE X-RAY BACKGROUND SHOWS NO EFFECT OF THIS
NEW GROWTH, AND NO OPTICAL FLARES WERE REPORTED.
IB.  SOLAR ACTIVITY FORECAST:  SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW.
IIA.  GEOPHYSICAL ACTIVITY SUMMARY FROM 25/2100Z TO 26/2100Z:
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB.  GEOPHYSICAL ACTIVITY FORECAST:  THE GEOMAGNETIC FIELD IS
EXPECTED TO REMAIN AT QUIET TO UNSETTLED CONDITIONS THROUGHOUT THE
INTERVAL.
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 071
PREDICTED   27 APR-29 APR  072/072/073
90 DAY MEAN        26 APR 074
V.  GEOMAGNETIC A INDICES
OBSERVED AFR/AP 25 APR  008/007
ESTIMATED AFR/AP 26 APR  003/008
PREDICTED AFR/AP 27 APR-29 APR  005/005-010/008-010/008
VI.  GEOMAGNETIC ACTIVITY PROBABILITIES 27 APR-29 APR
A.  MIDDLE LATITUDES
ACTIVE                10/20/20
MINOR STORM           01/05/05
MAJOR-SEVERE STORM    01/01/01
B.  HIGH LATITUDES
ACTIVE                20/25/25
MINOR STORM           05/10/10
MAJOR-SEVERE STORM    01/01/01