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(The monthly data in the wdc-like format is here.)

                                      WDC for Geomagnetism, Kyoto
                                Hourly Equatorial Dst Values (FINAL)      
                                          SEPTEMBER   2011
      unit=nT                                                                                      UT
      1   2   3   4   5   6   7   8    9  10  11  12  13  14  15  16   17  18  19  20  21  22  23  24
DAY
 1   -1  -3  -4  -4  -6  -6  -7  -7   -6  -5  -4  -6   2   1  -1  -1    1   4   1  -2  -4  -5  -6  -7
 2   -4  -3  -1  -3  -5  -6  -4  -3   -3  -5  -5  -7  -8  -5  -7 -11  -12 -10  -9  -7  -2   2   5   7
 3    7   6   6 -11 -15 -18 -16 -10   -9 -15 -22 -18 -15  -8 -10 -19  -24 -22 -21 -19 -16 -11  -9  -9
 4  -12 -15 -16 -18 -23 -28 -29 -29  -28 -23 -18 -15 -15 -18 -21 -26  -26 -26 -27 -25 -21 -20 -19 -19
 5  -19 -17 -14 -12  -8  -9 -12 -14  -16 -13 -10  -6  -5  -9 -15 -26  -26 -31 -31 -27 -24 -18 -20 -20

 6  -19 -20 -22 -19 -17 -22 -27 -28  -29 -29 -22 -20 -20 -25 -26 -24  -23 -18 -16 -14 -11  -8  -5  -9
 7  -14 -15 -11  -9  -9 -12 -14 -14  -14 -13  -9  -7  -9 -12 -14 -13  -12 -12 -15 -13  -9  -9  -9  -9
 8   -9 -13 -14 -13 -14 -14 -13 -13  -13  -9  -7  -5  -4  -2  -1   0    0  -1  -2  -1   2   3   3   4
 9    3   0  -2  -2   1   0   0  -2   -2  -1  -3  -1  19  36  16   1  -40 -72 -66 -62 -49 -53 -58 -66
10  -62 -71 -74 -74 -75 -74 -63 -51  -53 -51 -33 -21 -18 -17 -15 -16  -29 -31 -29 -22 -33 -47 -55 -53

11  -50 -50 -46 -44 -42 -40 -38 -39  -39 -34 -31 -27 -25 -32 -36 -32  -27 -27 -26 -26 -24 -26 -31 -29
12  -30 -35 -38 -44 -36 -29 -38 -38  -36 -28 -24 -23 -31 -25 -23 -22  -30 -43 -45 -36 -49 -53 -51 -40
13  -36 -37 -40 -41 -41 -40 -36 -33  -36 -42 -38 -34 -32 -30 -32 -31  -30 -30 -29 -29 -27 -26 -25 -20
14  -20 -18 -17 -17 -19 -21 -21 -20  -21 -20 -19 -21 -21 -21 -22 -22  -22 -25 -25 -22 -21 -18 -19 -19
15  -19 -17 -15 -13 -13 -19 -23 -23  -21 -20 -19 -18 -19 -18 -18 -17  -16 -17 -18 -22 -22 -23 -29 -29

16  -27 -23 -19 -17 -14 -15 -14 -14  -14 -15 -15 -15 -16 -18 -22 -22  -21 -18 -15 -15 -13 -13 -14 -16
17  -16 -16 -15 -10   3  11  18  21   21 -12 -40 -47 -42 -41 -59 -72  -56 -57 -68 -69 -61 -54 -50 -47
18  -46 -47 -45 -38 -35 -39 -38 -37  -35 -32 -30 -27 -28 -27 -30 -29  -28 -26 -27 -29 -30 -30 -30 -29
19  -31 -31 -30 -27 -24 -22 -21 -23  -22 -17 -13  -9  -8  -8  -8 -10  -14 -14 -15 -15 -14 -13 -14 -15
20  -16 -14 -14 -12 -17 -24 -24 -19  -19 -14 -14 -16 -17 -14 -15 -17  -18 -19 -20 -20 -24 -25 -22 -20

21  -18 -18 -16 -14  -9  -5  -6  -8   -8  -8  -5  -8 -13 -16 -19 -17  -13 -16 -16 -13 -11 -10 -11 -14
22  -15 -14 -13 -10  -7  -6  -7 -10   -9  -9  -9 -14 -14 -13 -10  -8   -8 -13 -19 -27 -29 -24 -21 -22
23  -15 -11 -10  -9  -6  -4  -5  -5   -3  -1  -3  -5  -7  -6  -5  -4   -6  -8  -8  -9  -8  -9  -6  -3
24   -1   1   3   4   1  -1  -2  -3   -3  -3  -3  -5  -8  -8  -6  -3   -4  -6  -9 -11 -12 -10  -7  -5
25   -4  -2  -1  -1  -2  -3  -5  -7   -6  -5  -5  -4   2   1   2   3   -1   0  -5  -5  -4  -2   3   6

26    7   9  12  12  12  10   8   7    7   7   4   7  23  25  17   7  -52 -82 -90 -78 -99-114-117-118
27 -102 -86 -70 -79 -77 -74 -68 -69  -77 -69 -63 -57 -51 -51 -48 -38  -36 -42 -38 -36 -33 -15 -14 -23
28  -32 -42 -42 -34 -45 -56 -68 -63  -57 -53 -58 -54 -54 -55 -54 -49  -46 -45 -45 -41 -36 -36 -36 -36
29  -37 -29 -50 -56 -40 -34 -30 -42  -44 -34 -34 -34 -35 -35 -31 -33  -32 -36 -37 -36 -37 -38 -39 -37
30  -35 -32 -35 -33 -30 -29 -30 -31  -30 -27 -26 -25 -25 -24 -24 -23  -26 -26 -18 -13  -9  -6  -3   1