H-ALPHA SOLAR FLARE REPORT FORMAT Apr 1938 - Present

Reports of the same flare by different observatories have NOT been identified
and labeled with a GROUPING NUMBER in columns 96-100.  The GROUP NUMBER, which
counts the number of distinct flares for each month, remains blank.

Files for 1938-54 were prepared from the International Astronomical Union's
QUARTERLY BULLETIN ON SOLAR ACTIVITY and have not been proofread.
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Column  Fmt   Description
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 1- 2   I2    DATA CODE; always 31
 3- 5   I3    STATION CODE; numeric; used within center
 6- 7   I2    YEAR
 8- 9   I2    MONTH
10-11   I2    DAY
12-13   A2    Asterisks mark record with unconfirmed change.
14-17   I4    START TIME
   18   A1    QUALIFIER: D=after,E=before,U=uncertain
19-22   I4    END TIME
   23   A1    QUALIFIER: D=after,E=before,U=uncertain
24-27   I4    MAX TIME; time of maximum brightness
   28   A1    QUALIFIER: D=after,E=before,U=uncertain
   29   A1    N or S for north or south latitude
30-31   I2    LATITUDE
   32   A1    E or W for east or west central meridian distance
33-34   I2    CENTRAL MERIDIAN DISTANCE
   35   A1    IMPORTANCE based on flare area = S,1,2 or 3
   36   A1    BRIGHTNESS: F=faint, N=normal, B=bright
   37   A1    COMPLETENESS = C,P,V or S; indicates the kind of
                 observation and the completeness of it
38-41   F4.0  TIME FLAER AREA was measured
42-46   F5.0  AREA; apparent area in millionths of solar disk
47-50   F4.1  AREA; corrected area in square degrees; implied
                 decimal point between columns 49 and 50
   51   A1    Blank
52-56   F5.2  LINE WIDTH; width in Angstroms of H-alpha line
57-59   A3    INTENSITY; brightness of H-alpha emission line
                 expressed as percentage above continuum
60      A1    X-RAY CLASS: C,M,X code the maximum power of 10
                 the 1-8 Angstrom flux attains
61-63   F3.1  X-RAY INTENSITY: a number from 1.0 to 9.9 that
                 multiplies the X-ray class
64-67   I4    CALCIUM PLAGE REGION in which flare occurred
68-71   A4    STATION name abbreviation
   72   I1    SEEING: atmospheric stability during observations
73-80   A8    REMARKS: USAF flare reports contain letter-coded
                 remarks in columns 73-75, status codes in 76,
                 and NOAA/USAF region numbers in 77-80.
              NOTE:  Beginning with January 1997 data, the integrated
                 flux for xray events from start to end will appear
                 here if available (units:  J/m*2)
81-85   I5    NOAA/USAF SUNSPOT REGION NUMBER
   86   A1    Blank; may be used to add a letter to a region
87-88   I2    CENTRAL MERIDIAN PASSAGE YEAR
89-90   I2    CENTRAL MERIDIAN PASSAGE MONTH
91-94   F4.1  CENTRAL MERIDIAN PASSAGE DAY
   95   A1    Blank
96-100  I5    GROUPING NUMBER assigned by WDC-A Boulder
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