:Product: 19970520RSGA.txt
:Issued: 1997 May 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 140 ISSUED AT 2200Z ON 20 MAY 1997
IA.  ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM  19/2100Z
TO 20/2100Z:  SOLAR ACTIVITY WAS VERY LOW. THERE WAS NO SIGNIFICANT
FLARE ACTIVITY. THE SPOTTED REGIONS CONTINUED TO SHOW SLOW GROWTH.
IB.  SOLAR ACTIVITY FORECAST:  SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW TO LOW. ISOLATED C-CLASS ACTIVITY IS POSSIBLE.
IIA.  GEOPHYSICAL ACTIVITY SUMMARY FROM 19/2100Z TO 20/2100Z:
THE GEOMAGNETIC FIELD WAS MOSTLY QUIET WITH A SINGLE PERIOD OF
UNSETTLED LEVELS AT MID LATITUDES AT ABOUT 20/0900Z.
IIB.  GEOPHYSICAL ACTIVITY FORECAST:  THE GEOMAGNETIC FIELD IS
EXPECTED TO BE MOSTLY QUIET FOR THE ENTIRE FORECAST PERIOD.
III.  EVENT PROBABILITIES 21 MAY-23 MAY
CLASS M    01/01/01
CLASS X    01/01/01
PROTON     01/01/01
PCAF       GREEN
IV.  PENTICTON 10.7 CM FLUX
OBSERVED           20 MAY 079
PREDICTED   21 MAY-23 MAY  080/080/078
90 DAY MEAN        20 MAY 074
V.  GEOMAGNETIC A INDICES
OBSERVED AFR/AP 19 MAY  004/004
ESTIMATED AFR/AP 20 MAY  007/008
PREDICTED AFR/AP 21 MAY-23 MAY  005/008-005/008-005/005
VI.  GEOMAGNETIC ACTIVITY PROBABILITIES 21 MAY-23 MAY
A.  MIDDLE LATITUDES
ACTIVE                05/05/05
MINOR STORM           01/01/01
MAJOR-SEVERE STORM    01/01/01
B.  HIGH LATITUDES
ACTIVE                05/05/05
MINOR STORM           01/01/01
MAJOR-SEVERE STORM    01/01/01