Stanford Mean Solar Magnetic Field (microTesla) 1997 Jan. Feb. March April May June July Aug. Sept. Oct. Nov. Dec. day 01 . -9 -3 -4 -6 . 4 -5 -10 13 6 -1 02 . 8 . -3 -4 16 -5 -10 -1 17 1 -21 03 11 25 . 3 -2 . -13 2 8 17 . . 04 . 20 18 -4 3 17 -10 2 16 19 -20 . 05 14 -1 11 5 0 5 -2 8 21 13 -5 . 06 12 -2 1 -2 0 -6 1 2 17 11 . . 07 22 -10 3 5 3 -2 1 7 37 3 0 . 08 18 0 -8 2 2 -1 13 15 35 . 8 36 09 8 -3 -13 0 -6 -2 -5 8 30 4 13 11 10 2 -19 -7 6 -12 1 9 8 16 1 40 2 11 . 0 -7 -5 -13 1 3 8 18 11 . -3 12 . 7 -9 -18 -3 4 0 10 29 . -7 -11 13 -5 -8 -12 -23 -12 13 0 6 31 . . . 14 . -13 6 -15 -17 -9 9 5 17 . . . 15 . -27 -10 -9 -3 5 12 -2 14 . . -5 16 . 3 . -7 -4 9 . -7 -4 . . -3 17 3 -15 -16 -1 12 17 -2 -1 6 . 0 . 18 . -9 -3 . 4 5 -11 -9 5 . . -11 19 43 4 -16 13 2 7 -10 . 3 . . -9 20 . -11 -14 -16 2 1 -16 . 9 32 -22 -6 21 . -6 -18 . 0 -10 -9 1 10 -6 . 18 22 . -9 -9 . -8 -14 -13 7 21 -7 . 3 23 1 -8 -7 -4 8 -11 . 18 25 7 12 -17 24 . -11 -1 3 6 -10 2 3 15 -16 -14 -5 25 15 -5 -8 -6 -5 -11 0 11 19 11 . 0 26 5 -15 -6 -5 -13 10 12 10 0 . . 2 27 -22 -1 -10 -10 -16 13 0 -4 -4 9 . 12 28 -5 -6 -9 -7 -4 1 -10 -14 0 15 . 5 29 -3 -17 -8 -7 6 -13 -15 -9 -10 . 19 30 -15 -8 -8 -4 4 -15 1 -2 10 . 8 31 . -1 1 -10 . 10 32