:Product: 19971218RSGA.txt
:Issued: 1997 Dec 18 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 352 ISSUED AT 2200Z ON 18 DEC 1997
IA.  ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM  17/2100Z
TO 18/2100Z:  SOLAR ACTIVITY WAS VERY LOW. REGION 8123 (N19E06) IS
THE ONLY SUNSPOT REGION ON THE DISK AND HAS BEEN QUIET.
IB.  SOLAR ACTIVITY FORECAST:  SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW.
IIA.  GEOPHYSICAL ACTIVITY SUMMARY FROM 17/2100Z TO 18/2100Z:
THE GEOMAGNETIC FIELD RANGED FROM QUIET TO ACTIVE. ACTIVE CONDITIONS
WERE EXPERIENCED AT MANY LOCATIONS DURING THE 18/0300-0600Z PERIOD.
IIB.  GEOPHYSICAL ACTIVITY FORECAST:  THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III.  EVENT PROBABILITIES 19 DEC-21 DEC
CLASS M    01/01/01
CLASS X    01/01/01
PROTON     01/01/01
PCAF       GREEN
IV.  PENTICTON 10.7 CM FLUX
OBSERVED           18 DEC 086
PREDICTED   19 DEC-21 DEC  084/084/084
90 DAY MEAN        18 DEC 093
V.  GEOMAGNETIC A INDICES
OBSERVED AFR/AP 17 DEC  004/003
ESTIMATED AFR/AP 18 DEC  007/006
PREDICTED AFR/AP 19 DEC-21 DEC  010/010-010/015-010/020
VI.  GEOMAGNETIC ACTIVITY PROBABILITIES 19 DEC-21 DEC
A.  MIDDLE LATITUDES
ACTIVE                10/10/10
MINOR STORM           05/05/05
MAJOR-SEVERE STORM    01/01/01
B.  HIGH LATITUDES
ACTIVE                10/10/10
MINOR STORM           05/05/05
MAJOR-SEVERE STORM    01/01/01