Stanford Mean Solar Magnetic Field (microTesla)

       1990                                                                               

        Jan.   Feb.  March  April   May    June   July   Aug.   Sept.  Oct.   Nov.   Dec. 
 day
  01      .    128      .     83     35     -9     -4     14    -75    -80      3     57
  02     22    150      .     47     19     -8    -13    -29    -77    -49     25     58
  03     70    344      .     33     23     -5    -34    -27      .      .     45     34
  04    106     99      .      4    -18    -34    -42    -38    -44     23     45      .
  05    132     69      .     -8    -24    -33    -36    -25     -2     44     29     11

  06    129     23      .    -29    -25    -33    -36      .     19     57      .      7
  07      .    -11      .      .    -27      .    -45    -13      .     51      .     47
  08     58      .    -28      .    -38    -26    -34      3     68     45      .     58
  09     23    -15    -23    -29    -33    -52    -12     26      .     41      .     82
  10     -7     -8      .    -36    -15    -86    -11     43     60     33      .      .

  11    -41    -14    -25    -34     -4    -83    -10     94     43      8      .     46
  12      .     -9    -23      .     -9      .    -15    137     41    -10     68     -7
  13      .      4    -11     -8    -47    -88     17     76     14    -25     52    -83
  14      .    -12    -15      0    -80    -58     32     25      5    -43      .   -126
  15      5     -2      2     -2    -82    -31     78      3     -1     -9     -4    -62

  16    -11      .      .      .    -80    -10     95      1    -17     24      .    -51
  17    -14      .    -10    -20    -88      .     57    -34     -9     12    -46    -20
  18    -58      .    -45      .      .     47     10    -33     30      0     -8      0
  19    -86    -78    -63      .      .     44     25    -27     35    -62      .      .
  20    -84      .   -108   -105      .     43     41    -22     23    -91     -1     -9

  21    -76   -142      .    -99    -29     11     20    -30    -20    -89      .    -23
  22    -88   -193   -150      .      .     -4    -12    -15    -78    -87    -24    -41
  23   -124   -167   -124      .     25      .      .    -16    -96    -69    -47    -55
  24   -152   -133   -113    -21     33    -12      7      .   -112    -56    -50    -37
  25   -184   -102    -74     23     16      7     25    -83   -121    -44      .     -1

  26   -203    -41    -62     57      3     13     50    -82   -107    -52    -69     36
  27   -200      .    -34     75      .     42     10    -89    -90    -54    -56     45
  28   -140      .      9     65      .     -7    -13   -106    -82    -65    -11     31
  29    -62            45     50      .     -2     39   -131    -86    -66      .    -18
  30      4           103     50      .      8      .   -128   -103    -54     48    -59
  31     46            94            -4           -67    -90           -31           -48