Stanford Mean Solar Magnetic Field (microTesla) 2010 Jan. Feb. March April May June July Aug. Sept. Oct. Nov. Dec. day 01 . 1 0 -11 -29 -11 2 -11 10 -5 . 3 02 . . -1 . -25 -2 13 0 7 3 -2 . 03 -5 3 1 -27 -21 8 8 10 -4 0 -2 . 04 1 . -7 . -18 14 1 15 -16 4 -2 . 05 1 . -18 -23 -8 15 -1 11 -14 4 -1 4 06 5 . . -18 7 11 -4 14 -4 6 0 16 07 2 -15 . -12 19 1 -6 8 5 0 . -4 08 -1 . . -2 25 -11 -2 -9 -2 -5 4 . 09 . -13 . 9 22 -14 9 -9 0 -7 -15 . 10 -19 -7 -5 . 10 -6 12 4 -9 -2 -17 . 11 -9 8 6 . -5 1 13 12 -11 0 -17 -14 12 -6 . . 15 -11 11 -4 2 -5 0 -28 . 13 -2 15 19 -1 -9 16 -8 -2 7 -7 -28 . 14 12 12 23 -8 -4 17 2 . 12 -12 -25 . 15 . 10 16 -13 6 9 13 4 -2 -19 -15 -17 16 21 8 5 -6 18 1 7 7 -18 -18 -17 -14 17 . -6 -6 -1 . 0 2 9 -25 . -20 . 18 . . -11 12 18 2 2 11 -28 -16 -27 . 19 . . -6 17 8 0 0 2 -36 -19 . . 20 -6 . 0 23 -11 -4 -1 -8 -34 -34 . . 21 . . 9 . -10 -5 -6 -17 -32 -40 0 . 22 . 8 14 -11 -2 -10 -8 -24 -27 . 10 . 23 . . 16 -21 0 -8 -10 -25 -36 . . 6 24 . -13 14 -9 -3 -11 -25 -23 -44 . 9 5 25 . -11 0 0 . -14 -32 -16 -40 1 8 . 26 . . -17 -6 -5 -18 -26 -16 -20 13 6 -1 27 -19 -16 -26 . . -27 -22 -22 7 19 . . 28 -10 -8 -23 3 -22 -22 -17 -25 22 8 2 . 29 -14 -24 -9 -21 -15 -8 -20 23 . 1 -2 30 -10 -15 -23 -22 -4 -8 1 11 2 1 -4 31 -8 -10 -21 -10 9 -1 .