:Product: 19981015RSGA.txt
:Issued: 1998 Oct 15 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 288 ISSUED AT 2200Z ON 15 OCT 1998
IA.  ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM  14/2100Z
TO 15/2100Z:  SOLAR ACTIVITY REMAINED AT LOW LEVELS. ISOLATED B- AND
C-CLASS SUBFLARES OCCURRED. MODERATE GROWTH WAS OBSERVED IN REGION
8360 (S19W25), BUT IT REMAINED STRUCTURALLY SIMPLE. THREE NEW
REGIONS WERE ASSIGNED: 8361 (N14W10), 8362 (N20E73), AND 8363
(N26E47), ALL OF WHICH WERE SMALL, SIMPLE SPOT GROUPS.
IB.  SOLAR ACTIVITY FORECAST:  SOLAR ACTIVITY IS EXPECTED TO REMAIN
AT LOW LEVELS. REGIONS 8358 (N15W26) AND 8360 APPEAR CAPABLE OF
C-CLASS FLARE PRODUCTION. REGION 8360 MAY ALSO PRODUCE AN ISOLATED
M-CLASS FLARE, SHOULD ITS PRESENT RATE OF GROWTH CONTINUE.
IIA.  GEOPHYSICAL ACTIVITY SUMMARY FROM 14/2100Z TO 15/2100Z:
THE GEOMAGNETIC FIELD WAS QUIET DURING MOST OF THE PERIOD. HOWEVER,
ACTIVITY INCREASED DURING 15/1600-1800UT WITH UNSETTLED LEVELS
DETECTED AT MIDDLE LATITUDES AND UNSETTLED TO MINOR STORM LEVELS AT
HIGH LATITUDES. THE GREATER THAN 2 MEV ELECTRON FLUX AT
GEOSYNCHRONOUS ALTITUDE REMAINED AT MODERATE TO HIGH LEVELS.
IIB.  GEOPHYSICAL ACTIVITY FORECAST:  THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET DURING THE FIRST TWO DAYS OF THE PERIOD. AN
INCREASE TO UNSETTLED CONDITIONS IS EXPECTED ON THE FINAL DAY.
III.  EVENT PROBABILITIES 16 OCT-18 OCT
CLASS M    20/20/20
CLASS X    01/01/01
PROTON     01/01/01
PCAF       GREEN
IV.  PENTICTON 10.7 CM FLUX
OBSERVED           15 OCT 131
PREDICTED   16 OCT-18 OCT  135/140/140
90 DAY MEAN        15 OCT 131
V.  GEOMAGNETIC A INDICES
OBSERVED AFR/AP 14 OCT  002/004
ESTIMATED AFR/AP 15 OCT  004/005
PREDICTED AFR/AP 16 OCT-18 OCT  005/005-005/005-008/008
VI.  GEOMAGNETIC ACTIVITY PROBABILITIES 16 OCT-18 OCT
A.  MIDDLE LATITUDES
ACTIVE                10/10/15
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