:Product: 19990331RSGA.txt
:Issued: 1999 Mar 31 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 090 ISSUED AT 2200Z ON 31 MAR 1999
IA.  ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM  30/2100Z
TO 31/2100Z:  SOLAR ACTIVITY WAS VERY LOW. ONE NEW SPOT GROUP WAS
NUMBERED, REGION 8505 (N10W56).
IB.  SOLAR ACTIVITY FORECAST:  SOLAR ACTIVITY IS EXPECTED TO REMAIN
VERY LOW WITH A CHANCE OF AN ISOLATED C-CLASS EVENT.
IIA.  GEOPHYSICAL ACTIVITY SUMMARY FROM 30/2100Z TO 31/2100Z:
THE GEOMAGNETIC FIELD WAS MOSTLY UNSETTLED WITH ISOLATED QUIET
PERIODS. THE GREATER THAN 2 MEV ELECTRONS AT GEOSYNCHRONOUS ORBIT
ATTAINED MODERATE LEVELS AT 31/1200UT AND CONTINUED TILL 31/2050UT
WHEN THEY RETURNED TO BACKGROUND LEVELS.
IIB.  GEOPHYSICAL ACTIVITY FORECAST:  THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III.  EVENT PROBABILITIES 01 APR-03 APR
CLASS M    01/01/01
CLASS X    01/01/01
PROTON     01/01/01
PCAF       GREEN
IV.  PENTICTON 10.7 CM FLUX
OBSERVED           31 MAR 102
PREDICTED   01 APR-03 APR  105/110/110
90 DAY MEAN        31 MAR 136
V.  GEOMAGNETIC A INDICES
OBSERVED AFR/AP 30 MAR  014/018
ESTIMATED AFR/AP 31 MAR  015/012
PREDICTED AFR/AP 01 APR-03 APR  015/015-015/015-012/015
VI.  GEOMAGNETIC ACTIVITY PROBABILITIES 01 APR-03 APR
A.  MIDDLE LATITUDES
ACTIVE                25/25/20
MINOR STORM           10/10/05
MAJOR-SEVERE STORM    01/01/01
B.  HIGH LATITUDES
ACTIVE                25/25/20
MINOR STORM           10/10/05
MAJOR-SEVERE STORM    01/01/01