FROM SPACE ENVIRONMENT SERVICES CENTER, BOULDER, COLORADO
SDF NUMBER 366
JOINT USAF/NOAA REPORT OF SOLAR AND GEOPHYSICAL ACTIVITY.
ISSUED 2200Z 31 DEC 1988
IA.  ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM 30/2100Z
TO 31/2100Z: SOLAR ACTIVITY WAS LOW. THE OVERALL FLUX BACKGROUND
CONTINUED TO DROP FOR BOTH X-RAY AND CENTIMETRIC THRESHOLDS.
IB.  SOLAR ACTIVITY FORECAST:  SOLAR ACTIVITY IS EXPECTED TO BE
LOW. REGION 5292 (S18W50) CONTINUES TO PROVIDE A VERY SLIGHT
CHANCE OF BOTH HIGH ACTIVITY AND A PROTON PRODUCING FLARE.
IIA.  GEOPHYSICAL ACTIVITY SUMMARY FROM 30/2100Z TO 31/2100Z:
THE GEOMAGNETIC FIELD WAS UNSETTLED.
IIB.  GEOPHYSICAL ACTIVITY FORECAST:  THE GEOMAGNETIC FIELD IS
EXPECTED TO BE AT ACTIVE LEVELS THE LAST HALF OF THE FIRST DAY
AND THE SECOND DAY DUE TO AN EXPECTED RESPONSE TO THE X1/3B
FLARE LATE ON 30 DEC 88. THE INITIAL FIRST HALF-DAY AND THE
LAST DAY OF THE PERIOD ARE EXPECTED TO BE UNSETTLED.
III.  EVENT PROBABILITIES 01 JAN-03 JAN
CLASS M    45/40/35
CLASS X    07/06/05
PROTON     07/06/05
PCAF       GREEN
IV.  OTTAWA 10.7 CM FLUX
OBSERVED           31 DEC  182
PREDICTED   01 JAN-03 JAN  170/160/155
90 DAY MEAN        31 DEC  176
V.  GEOMAGNETIC A INDICES
OBSERVED  AFR/AP 30 DEC  011/012
ESTIMATED AFR/AP 31 DEC  010/011
PREDICTED AFR/AP 01 JAN-03 JAN  011/016-019/018-012/015