Stanford Mean Solar Magnetic Field (microTesla) 2015 Jan. Feb. March April May June July Aug. Sept. Oct. Nov. Dec. day 01 . . -11 79 -25 . . 25 22 20 50 11 02 . 49 42 41 -30 -18 -73 57 18 29 43 . 03 -25 91 103 -18 -17 -32 -41 77 19 36 30 37 04 16 . 124 -39 -12 -76 -19 57 18 42 29 48 05 52 . 108 -34 -22 -70 37 15 15 40 35 . 06 97 . 60 . -15 -47 64 1 23 35 44 56 07 115 . 3 . . -35 70 2 28 25 53 . 08 . . -33 -22 -44 5 70 8 39 25 60 . 09 . . -60 -15 -37 50 . 17 36 28 . 1 10 145 -87 . -19 -40 . . 21 31 38 46 -19 11 75 -68 . -17 -33 57 10 29 26 51 21 -44 12 12 -73 -60 -22 1 43 -1 32 . 54 -1 -48 13 -70 -53 -38 -16 25 25 4 44 32 50 -29 . 14 -107 -24 -27 -4 . -4 7 33 . 35 -40 10 15 . 10 -32 17 37 -16 12 25 37 -14 -35 24 16 . 18 . 23 31 -8 37 31 38 -35 -19 30 17 -45 . -21 28 . 20 51 36 14 . 17 21 18 -6 -7 9 48 . 41 35 40 -32 -62 37 10 19 17 15 21 43 -13 45 29 36 -74 -42 30 -23 20 9 26 . 13 . 72 29 20 -95 -13 5 . 21 3 25 . -8 . 57 34 -4 -82 26 -18 . 22 5 13 . -18 . 45 36 -36 -55 40 -18 -11 23 20 12 . -23 72 35 34 -72 -18 38 -15 4 24 21 -6 -29 -5 84 29 22 -87 30 22 -2 -5 25 2 -51 -67 39 81 28 3 -89 59 10 24 9 26 . -71 -44 75 47 28 -33 -42 73 9 30 14 27 -19 . -26 92 6 19 -85 -9 67 . 34 -3 28 -43 . -16 77 -6 7 -103 22 47 19 35 -11 29 -65 30 43 0 -24 -89 59 35 30 36 0 30 -61 78 0 10 -72 -40 73 . 40 . 27 31 -35 102 9 -9 56 38 43