:Product: 19990303RSGA.txt
:Issued: 1999 Mar 03 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 062 ISSUED AT 2200Z ON 03 MAR 1999
IA.  ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM  02/2100Z
TO 03/2100Z:  SOLAR ACTIVITY WAS LOW. REGION 8471 (N29W52) PRODUCED A
C2/SF AT 03/0128Z AND A C4/SF AT 03/0345Z. THIS REGION SHOWED SLIGHT
DECAY DURING THE PERIOD. REGION 8476 (N18W22) PRODUCED A C1/SF AT
03/0602Z AND A C1/SF AT 03/1654Z. CONTINUED GROWTH WAS OBSERVED IN
THIS REGION AND MINOR MIXED POLARITIES WERE OBSERVED. REGION 8475
(N31W10) WAS RELATIVELY QUIET BUT MINOR MIXING OF POLARITIES WAS
ALSO VISIBLE IN THIS REGION. BEGINNING AT 03/1841Z, THE MAUNA LOA
CORONAGRAPH OBSERVED A CORONAL MASS EJECTION AND ERUPTIVE PROMINENCE
FROM NEAR SW20.
IB.  SOLAR ACTIVITY FORECAST:  SOLAR ACTIVITY SHOULD BE LOW TO
MODERATE. OCCASIONAL C-CLASS EVENTS ARE EXPECTED FROM REGIONS 8471,
8475, AND 8476. EACH OF THESE REGIONS IS ALSO CAPABLE OF PRODUCING
ISOLATED M-CLASS EVENTS. CONTINUED GROWTH IN REGION 8476 COULD MAKE
IT THE PREDOMINANT FLARE PRODUCING REGION ON THE SUN. OVERALL
ACTIVITY LEVELS SHOULD BECOME ELEVATED BEGINNING ON 6 MAR AS
PREVIOUSLY ACTIVE LONGITUDES RETURN TO THE EAST LIMB.
IIA.  GEOPHYSICAL ACTIVITY SUMMARY FROM 02/2100Z TO 03/2100Z:
THE GEOMAGNETIC FIELD WAS PREDOMINANTLY QUIET TO UNSETTLED. THE
PLANETARY K-INDEX REACHED ACTIVE LEVELS IN THE 03/1500-2100Z
INTERVAL. SOLAR WIND VELOCITY DECREASED APPROXIMATELY 100 KM/S
DURING THE PERIOD AND BZ WAS NORTHWARD FOR ALMOST ALL THE PERIOD.
ENERGETIC ELECTRON FLUXES AT GEOSYNCHRONOUS ORBIT BECAME MODERATE.
IIB.  GEOPHYSICAL ACTIVITY FORECAST:  THE GEOMAGNETIC FIELD SHOULD
REMAIN PREDOMINANTLY QUIET TO UNSETTLED FOR THE NEXT THREE DAYS.
SLIGHT CORONAL HOLE EFFECTS COULD BE EXPERIENCED ON 06 MAR.
BEGINNING THEN, BRIEF PERIODS OF ACTIVE CONDITIONS ARE POSSIBLE.
III.  EVENT PROBABILITIES 04 MAR-06 MAR
CLASS M    50/50/50
CLASS X    10/10/10
PROTON     05/05/05
PCAF       GREEN
IV.  PENTICTON 10.7 CM FLUX
OBSERVED           03 MAR 137
PREDICTED   04 MAR-06 MAR  140/143/150
90 DAY MEAN        03 MAR 143
V.  GEOMAGNETIC A INDICES
OBSERVED AFR/AP 02 MAR  012/018
ESTIMATED AFR/AP 03 MAR  010/013
PREDICTED AFR/AP 04 MAR-06 MAR  008/013-008/009-010/009
VI.  GEOMAGNETIC ACTIVITY PROBABILITIES 04 MAR-06 MAR
A.  MIDDLE LATITUDES
ACTIVE                20/20/30
MINOR STORM           10/10/10
MAJOR-SEVERE STORM    05/05/05
B.  HIGH LATITUDES
ACTIVE                30/25/30
MINOR STORM           10/10/15
MAJOR-SEVERE STORM    01/01/01