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19880912RSGA.txt
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FROM SPACE ENVIRONMENT SERVICES CENTER, BOULDER, COLORADO
SDF NUMBER 256
JOINT USAF/NOAA REPORT OF SOLAR AND GEOPHYSICAL ACTIVITY.
ISSUED 2200Z 12 SEP 1988
IA. ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM 11/2100Z
TO 12/2100Z: SOLAR ACTIVITY HAS BEEN LOW. NEW REGION
5149 (S21W10) EMERGED AS A SMALL BIPOLAR SUNSPOT GROUP.
IB. SOLAR ACTIVITY FORECAST: SOLAR ACTIVITY IS EXPECTED TO BE
LOW. THERE IS A VERY SLIGHT CHANCE OF M-CLASS FLARE ACTIVITY.
IIA. GEOPHYSICAL ACTIVITY SUMMARY FROM 11/2100Z TO 12/2100Z:
THE GEOMAGNETIC FIELD HAS BEEN AT QUIET TO MAJOR STORM LEVELS
FOR THE PAST 24 HOURS. A MINOR GEOMAGNETIC STORM BEGAN AT
BOULDER AT 10/2100Z. THE STORM ENDED AT BOULDER AT 12/0600Z.
IIB. GEOPHYSICAL ACTIVITY FORECAST: THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED AT MIDDLE LATITUDES AND
MOSTLY ACTIVE AT HIGH LATITUDES.
III. EVENT PROBABILITIES 13 SEP-15 SEP
CLASS M 10/10/10
CLASS X 01/01/01
PROTON 01/01/01
PCAF GREEN
IV. OTTAWA 10.7 CM FLUX
OBSERVED 12 SEP 125
PREDICTED 13 SEP-15 SEP 128/128/130
90 DAY MEAN 12 SEP 150
V. GEOMAGNETIC A INDICES
OBSERVED AFR/AP 11 SEP 033/065
ESTIMATED AFR/AP 12 SEP 016/035
PREDICTED AFR/AP 13 SEP-15 SEP 010/025-007/020-007/018