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

                                      WDC for Geomagnetism, Kyoto
                                Hourly Equatorial Dst Values (FINAL)      
                                          SEPTEMBER   2006
      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  -34 -31 -27 -23 -21 -19 -16 -16  -24 -22 -20 -13 -15 -19 -22 -23  -21 -27 -26 -28 -27 -34 -39 -36
 2  -27 -25 -25 -25 -27 -25 -21 -18  -15 -13 -12  -7 -12 -15 -13  -9   -7  -8  -8 -14 -19 -20 -16 -11
 3  -12 -10 -10 -11 -10  -9  -9  -7  -10 -11 -12  -8  -8  -4  -1  -3   -7  -6  -2  -1  -3  -7  -8  -5
 4    3  -6 -14 -23 -36 -45 -37 -38  -38 -38 -36 -32 -25 -20 -17 -19  -19 -23 -28 -27 -24 -26 -31 -34
 5  -32 -26 -22 -20 -24 -28 -28 -24  -20 -23 -23 -20 -18 -15 -11 -10  -11 -13 -15 -12 -11 -11 -11 -12

 6  -13 -15 -15 -15 -18 -19 -19 -21  -21 -19 -21 -25 -28 -26 -21 -17  -15 -13 -14 -15 -17 -16 -16 -16
 7  -16 -16 -15 -12 -12 -13 -14 -15  -14 -12 -11 -11 -14 -17 -19 -19  -17 -17 -19 -18 -15 -14 -12 -11
 8  -11 -10  -9  -9 -13 -17 -12  -9   -8  -9  -6  -6  -6 -10  -8  -6   -6  -5  -3  -3  -4  -2   2   4
 9    3   1   0  -2  -2   0   0  -2   -4  -3  -1  -1  -2  -3  -2  -1    0   1   2   2   1  -3  -2  -2
10   -4  -6  -5  -2   0  -1  -2  -1   -1   3   4   9  11   9   8   7    5   2   5   3  -3  -1  -4  -4

11   -5  -8 -12 -11  -7  -5  -5 -11  -17 -16 -11  -8 -10 -17 -15 -13   -9  -7  -6  -6  -7  -8 -11 -11
12  -11 -11  -6  -4  -1  -1  -6 -10   -8  -9 -10  -7  -6  -9  -7  -5   -4  -4  -6  -3  -2  -3  -4  -6
13   -8 -11  -8 -10 -14 -18 -20 -14  -14 -17 -12 -10 -10 -12 -11 -12  -11 -11 -11  -9  -9 -10 -11 -12
14  -13 -11 -11  -9  -9 -13 -11 -13  -13 -12 -10  -9  -9  -7  -5  -5   -5  -4  -2   0  -3  -5  -7  -9
15  -12  -9  -8  -6  -4  -2  -2  -3   -3  -1   2   2   2   1   1   0    0   3   2   2   4   3   2   1

16    0  -2  -2  -1  -3  -1   2   3    3   3   4   2   2   4   3   0    1   2  -2  -4  -4  -3  -1   0
17    1  -2  -4  -2  -3  -7 -12 -14  -14  -9 -16 -17 -15 -14  -9  -5   -4  -2  -6 -19 -31 -24 -17 -13
18  -14 -18 -29 -29 -24 -26 -30 -29  -30 -34 -31 -22 -14 -16 -16 -17  -15 -20 -23 -17 -15 -17 -19 -24
19  -27 -27 -25 -25 -22 -21 -26 -23  -24 -23 -24 -22 -21 -22 -25 -22  -23 -25 -27 -24 -23 -22 -23 -22
20  -20 -19 -19 -21 -23 -21 -20 -20  -19 -19 -17 -15 -15 -16 -15 -15  -15 -18 -18 -17 -15 -16 -16 -15

21  -15 -12 -10  -7  -8 -10 -10  -9  -10 -11 -10 -12  -8  -7  -7  -6   -7  -7  -8  -7  -7  -8 -10  -8
22   -7  -5  -4  -1   0  -2  -1   0    0   0  -1  -3  -1  -1  -1   0   -2  -4  -5  -4  -1  -2  -4  -5
23   -3  -2  -2   0   0  -2  -2   0    1  -2  -7 -10  -8  -4   3   9   12  14   9   0   4  -2   2   1
24    4  -7 -15 -23 -46 -38 -45 -51  -51 -55 -48 -37 -33 -26 -22 -20  -19 -22 -23 -21 -18 -17 -18 -17
25  -15 -16 -17 -17 -16 -13 -12 -12  -18 -28 -31 -30 -30 -29 -26 -21  -19 -21 -22 -21 -20 -22 -24 -22

26  -20 -18 -18 -18 -18 -18 -13 -10  -10  -9 -10 -11 -14 -15 -12  -8   -9 -13 -17 -19 -17 -17 -21 -21
27  -20 -22 -19 -19 -18 -14 -12  -9  -10 -13 -13 -13 -11  -8  -8 -13  -12 -13  -9  -8 -10 -13 -16 -15
28  -16 -15 -14 -12  -9  -8  -8  -5   -5  -7 -10  -8  -6  -6  -4  -5   -5  -3   0   1  -2   1  -1  -3
29    2   2   3   2   2   3   2  -3   -3  -4  -2  -2   0  -3  -2  -2   -2   2   1   2   3   2   0  -1
30   -1   2   9  12  -3 -16 -21 -12   -5  -4 -14 -16  -7  -4   1   3    5   1  -7  -8  -9 -13 -16 -17