Stanford Mean Solar Magnetic Field (microTesla) 2007 Jan. Feb. March April May June July Aug. Sept. Oct. Nov. Dec. day 01 14 . . -6 . 2 -24 13 11 5 -4 0 02 . . -20 2 . 3 -22 20 . . -4 -2 03 -14 -24 -19 7 22 -4 -3 20 . -6 -8 -2 04 . -16 -10 . . -14 13 19 3 0 -4 . 05 -24 . -3 . 15 -20 12 12 0 -4 -4 -8 06 -21 9 5 10 10 -4 18 4 . -6 -1 . 07 -24 . . . -1 9 23 5 -2 -11 -4 -9 08 -19 . 17 6 -7 10 22 1 -7 -8 . -18 09 6 . 22 8 . 17 16 -6 -13 . -4 -25 10 15 . 14 0 . 20 . -8 -11 . . -33 11 18 . 10 . 2 19 6 -12 -7 1 -20 -6 12 13 . 9 -6 9 19 5 -9 -3 . -24 -3 13 15 . 7 -7 11 17 4 -10 . -3 -30 0 14 21 6 -1 . 12 12 -6 -12 . -8 -12 7 15 24 1 -11 5 11 4 -8 -10 . . -8 21 16 13 -12 -10 10 11 -6 -9 -2 -5 . 6 20 17 1 -13 -7 14 7 -12 -12 -1 -13 -25 14 . 18 -5 -14 -2 17 5 -16 -8 0 -21 -18 15 . 19 -1 . 1 . -3 -13 -11 -2 . . 20 9 20 -17 -4 . . -9 -13 -4 -4 -28 4 16 10 21 -27 . 13 . -14 -11 6 -11 . 14 15 7 22 -8 . 15 -9 -15 -14 6 -20 . 19 9 8 23 3 . 16 -14 -13 -5 -1 -27 . 16 4 0 24 9 20 10 -17 -10 4 -5 -30 11 19 3 -2 25 17 . . -19 -9 9 -9 -15 16 14 12 -4 26 . . . -13 -10 5 -17 0 21 5 -3 -1 27 . . . -16 -5 -1 -24 10 18 3 -2 5 28 . . -16 -9 . -5 -27 14 . 5 -4 . 29 . -18 8 10 -4 -23 17 . 2 -2 . 30 -8 -13 . 10 -14 3 21 7 0 -2 -3 31 . -6 5 6 17 -1 -5