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

                                      WDC for Geomagnetism, Kyoto
                                Hourly Equatorial Dst Values (FINAL)      
                                              APRIL   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   -6  -7  -6  -4  -2  -2  -2  -3   -2  -1  -3  -1   2   2   2   2    2   2   2   2   2   3   1  -2
 2    0   2   3   5   6   5   5   8    9  12  13  12  10  11  12  12   11   9   9   9   9   9   8   5
 3    6   7   9   9   8   7   7   8    9  10   8  11  11   9   9   9    9   9  11  14  17  18  16  16
 4   17  17  16  15  14  16  19  25   26  17  12   1  -5  -8 -14 -14  -22 -28 -27 -28 -25 -23 -27 -30
 5  -27 -28 -35 -43 -47 -53 -53 -52  -48 -47 -56 -74 -73 -69 -70 -79  -70 -67 -65 -56 -51 -48 -46 -40

 6  -37 -32 -30 -36 -46 -57 -58 -44  -33 -37 -40 -37 -30 -27 -27 -28  -27 -27 -26 -29 -31 -31 -28 -23
 7  -18 -18 -21 -26 -28 -28 -25 -23  -19 -16 -16 -17 -16 -14 -16 -19  -21 -21 -19 -17 -16 -14 -15 -15
 8  -14 -14 -14 -14 -14 -12 -11  -7   -2   2   0  -2  -8 -12 -10  -5   -5  -8 -12 -12  -9  -5  -9 -10
 9   -8 -16 -29 -27 -29 -46 -78 -82  -75 -68 -49 -38 -33 -34 -33 -34  -36 -31 -23 -35 -38 -53 -41 -34
10  -36 -39 -43 -51 -55 -48 -43 -42  -33 -27 -26 -27 -32 -36 -37 -39  -41 -39 -36 -36 -35 -36 -35 -31

11  -24 -22 -24 -28 -30 -27 -24 -24  -23 -19 -18 -18 -22 -24 -25 -26  -26 -24 -23 -23 -24 -23 -24 -20
12  -14 -17 -21 -21 -17 -17 -15 -12  -12 -13 -16 -17 -16 -14 -14 -13  -12 -12 -11 -13 -15 -14 -11  -9
13   -7  -3   1  -1   0   5   2  -2  -13 -18 -13 -10   4  11  17  14    3  -8  -7  -6  -1   0  -8  -3
14    0  -8 -14 -21 -48 -70 -77 -82  -82 -98 -78 -75 -75 -72 -69 -78  -81 -77 -68 -69 -74 -73 -61 -51
15  -47 -48 -55 -52 -48 -44 -43 -40  -39 -47 -39 -43 -45 -41 -46 -51  -52 -55 -51 -49 -52 -54 -55 -53

16  -49 -47 -47 -46 -44 -43 -43 -41  -41 -34 -33 -30 -31 -33 -34 -39  -39 -37 -35 -33 -34 -36 -34 -32
17  -27 -26 -30 -32 -35 -37 -34 -29  -25 -24 -24 -23 -21 -21 -23 -25  -24 -20 -17 -13 -15 -22 -27 -29
18  -35 -37 -38 -34 -35 -35 -34 -32  -29 -27 -26 -25 -25 -26 -27 -27  -25 -23 -22 -22 -21 -23 -20 -20
19  -23 -25 -22 -23 -23 -24 -22 -19  -18 -17 -18 -15 -12 -13 -17 -19  -18 -19 -20 -18 -14  -9  -6  -4
20   -5  -8 -10  -8  -7  -9  -7  -5   -7  -4  -1  -1  -4 -12 -18 -20  -20 -15 -12 -10  -7  -5  -5  -4

21   -3  -4  -4  -7  -9  -8  -6  -5   -7  -2   7   9   8   6   2   3   -4  -7  -5  -5  -2  -5  -6  -1
22    0 -10 -27 -45 -43 -35 -32 -34  -26 -23 -19 -32 -31 -29 -29 -32  -34 -34 -33 -31 -29 -26 -23 -18
23  -14 -14 -17 -22 -22 -25 -26 -30  -26 -20 -17 -13 -14 -15 -17 -21  -20 -19 -16 -15 -15 -16 -14 -15
24  -13 -16 -20 -23 -26 -27 -27 -25  -21 -17 -12  -9  -8 -11 -13 -16  -14 -13 -12 -11 -10 -10 -12 -16
25  -20 -18 -16 -16 -18 -17 -15 -12  -10  -7  -8  -8  -7  -7  -9 -11  -12 -11 -10 -13 -13 -11 -10  -7

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