:Product: 19990302RSGA.txt
:Issued: 1999 Mar 02 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 061 ISSUED AT 2200Z ON 02 MAR 1999
IA.  ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM  01/2100Z
TO 02/2100Z:  SOLAR ACTIVITY WAS LOW. REGION 8475 (N31E03) PRODUCED A
C6/SN AT 02/1212Z WITH MINOR RADIO BURSTS. REGION 8471 (N28W40)
GENERATED A MODERATE DURATION C6/1F AT 02/1519Z. FREQUENT SUBFLARES
OCCURRED IN SEVERAL REGIONS. REGIONS 8475 AND 8471 EXHIBITED SLIGHT
GROWTH AND LESSENED MAGNETIC COMPLEXITY. RECENT VECTOR MAGNETOGRAPH
DATA INDICATED SMALL AREAS OF MODERATE SHEAR IN EACH REGION. REGION
8476 (N18W09) GREW AT A MODERATE PACE AND THE EXISTENCE OF A
MULTI-STRAND ARCH FILAMENT SYSTEM BODES WELL FOR CONTINUED GROWTH.
NEW REGION 8479 (S14W17) WAS SPLIT OFF FROM REGION 8478 (S15W25).
IB.  SOLAR ACTIVITY FORECAST:  SOLAR ACTIVITY SHOULD BE AT LOW TO
MODERATE LEVELS FOR THE NEXT THREE DAYS. REGIONS 8471, 8475, AND
8476 SHOULD PRODUCE SEVERAL C-CLASS EVENTS PER DAY. ISOLATED M-CLASS
EVENTS ARE POSSIBLE FROM REGIONS 8471 AND 8475. CONTINUED EMERGENCE
OF REGION 8476 COULD RESULT IN SMALL M-CLASS EVENTS DURING THE
PERIOD.
IIA.  GEOPHYSICAL ACTIVITY SUMMARY FROM 01/2100Z TO 02/2100Z:
THE GEOMAGNETIC FIELD WAS AT ACTIVE TO MINOR STORM LEVELS FROM
02/2100-02/0600Z. AFTERWARD, THE FIELD WAS QUIET TO UNSETTLED. SOLAR
WIND VELOCITY WAS IN EXCESS OF 500 KM/S AND DENSITY WAS IN THE 3-4
P/CC RANGE.
IIB.  GEOPHYSICAL ACTIVITY FORECAST:  THE GEOMAGNETIC FIELD SHOULD BE
PREDOMINANTLY QUIET TO UNSETTLED FOR THE NEXT THREE DAYS. PERIODS AT
ACTIVE CONDITIONS ARE POSSIBLE DURING THAT TIME. ENERGETIC ELECTRON
FLUXES AT GEOSYNCHRONOUS ORBIT ARE LIKELY TO INCREASE IN THE NEXT
TWO DAYS.
III.  EVENT PROBABILITIES 03 MAR-05 MAR
CLASS M    50/50/50
CLASS X    10/10/10
PROTON     05/05/05
PCAF       GREEN
IV.  PENTICTON 10.7 CM FLUX
OBSERVED           02 MAR 130
PREDICTED   03 MAR-05 MAR  130/131/132
90 DAY MEAN        02 MAR 144
V.  GEOMAGNETIC A INDICES
OBSERVED AFR/AP 01 MAR  023/033
ESTIMATED AFR/AP 02 MAR  016/017
PREDICTED AFR/AP 03 MAR-05 MAR  012/013-010/013-010/009
VI.  GEOMAGNETIC ACTIVITY PROBABILITIES 03 MAR-05 MAR
A.  MIDDLE LATITUDES
ACTIVE                35/25/20
MINOR STORM           15/10/10
MAJOR-SEVERE STORM    05/05/05
B.  HIGH LATITUDES
ACTIVE                35/35/25
MINOR STORM           15/15/10
MAJOR-SEVERE STORM    05/05/05