:Product: 19981204RSGA.txt
:Issued: 1998 Dec 04 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 338 ISSUED AT 2200Z ON 04 DEC 1998
IA.  ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM  03/2100Z
TO 04/2100Z:  SOLAR ACTIVITY WAS LOW. FOUR MINOR C-CLASS X-RAY EVENTS
OCCURRED, TWO UNCORRELATED, AND ONE EACH FROM REGIONS 8402 (N17E30)
AND 8399 (N20W40). OF THE SEVEN ACTIVE REGIONS ON THE VISIBLE DISK,
8402 AND 8395 REMAIN THE MOST COMPLEX. REGION 8402 HAS GROWN
SLIGHTLY SINCE YESTERDAY,  AND IS CURRENTLY A 22-SPOT 'FSO' GROUP,
WITH A BETA-GAMMA-DELTA MAGNETIC CLASSIFICATION AS REPORTED BY THE
MT. WILSON OBSERVATORY. REGION 8395 (N20W40) HAS BEEN RELATIVELY
STABLE DURING THE PAST 24 HOURS, AND IS NOW AN 11-SPOT 'FSO' GROUP,
WITH A BETA-GAMMA MAGNETIC CLASSIFICATION BY MT. WILSON. NEW REGION
8403 (N20E37), A SMALL 'HSX' ALPHA GROUP WAS NUMBERED LATE
YESTERDAY.
IB.  SOLAR ACTIVITY FORECAST:  SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE, WITH THE CONTINUED LIKLIHOOD OF C-CLASS, AND
POSSIBILITY OF M-CLASS, EVENTS FROM REGIONS 8395 AND 8402.
IIA.  GEOPHYSICAL ACTIVITY SUMMARY FROM 03/2100Z TO 04/2100Z:
THE GEOMAGNETIC FIELD HAS BEEN QUIET TO UNSETTLED FOR THE PAST 24
HOURS.
IIB.  GEOPHYSICAL ACTIVITY FORECAST:  THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED FOR THE NEXT THREE DAYS.
III.  EVENT PROBABILITIES 05 DEC-07 DEC
CLASS M    25/25/25
CLASS X    05/05/05
PROTON     05/05/05
PCAF       GREEN
IV.  PENTICTON 10.7 CM FLUX
OBSERVED           04 DEC 148
PREDICTED   05 DEC-07 DEC  147/146/145
90 DAY MEAN        04 DEC 131
V.  GEOMAGNETIC A INDICES
OBSERVED AFR/AP 03 DEC  007/007
ESTIMATED AFR/AP 04 DEC  010/010
PREDICTED AFR/AP 05 DEC-07 DEC  010/010-010/010-005/010
VI.  GEOMAGNETIC ACTIVITY PROBABILITIES 05 DEC-07 DEC
A.  MIDDLE LATITUDES
ACTIVE                15/15/15
MINOR STORM           05/05/05
MAJOR-SEVERE STORM    01/01/01
B.  HIGH LATITUDES
ACTIVE                15/15/15
MINOR STORM           05/05/05
MAJOR-SEVERE STORM    01/01/01