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

                                      WDC for Geomagnetism, Kyoto
                                Hourly Equatorial Dst Values (FINAL)      
                                                MAY   2000
      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   -7 -14 -14 -16 -13 -12 -16 -17  -16 -12  -9 -12 -18 -18 -13 -20  -24 -23 -28 -31 -32 -27 -25 -23
 2  -24 -32 -29 -23 -15 -14 -14 -19  -20 -11 -18 -33 -36 -24 -22 -33  -32 -33 -34 -35 -37 -35 -32 -29
 3  -23 -21 -21 -19 -16 -15 -13  -9   -9  -4   0   1   3   3   8   9    1 -19 -19 -29 -34 -35 -28 -27
 4  -29 -31 -32 -30 -22 -17 -16 -12   -8  -6  -4 -11 -16 -16 -16 -12  -13 -12 -15 -18 -18 -15 -14 -14
 5  -16 -17 -14 -11  -7 -10 -10 -13  -12 -12 -19 -19 -20 -19 -14 -12  -10 -10 -12 -14 -12  -8  -5  -8

 6  -15 -20 -22 -24 -28 -29 -25 -24  -23 -18 -14  -7  -7  -9 -12  -9   -9  -6  -5  -4  -4  -4  -3  -6
 7  -10 -10  -7  -6  -5  -5  -1   0    2   5   7   8   6   7   4   3    2   4   6   6   7   9  13   9
 8    7   8  13  16  19  21  26  29   25  22  19  19  19  22  24  23   22  23  20  16  17  12  10  10
 9    9   8   5   6   7  10  15  12    3  -1  -3  -6  -3  -4  -7  -3   -2  -5  -8 -11  -7  -7 -12 -19
10  -21 -23 -18 -13 -16 -12  -9  -9   -8  -8  -6  -3  -5 -10 -11 -12  -13 -13 -12  -9  -4  -1  -1   0

11   -2  -7 -11 -15 -10  -2   2   2    2   3   4   3   1   1   0   3    6   5   3   0  -2  -1  -1   4
12    6   7   6  -6 -20 -26 -26 -34  -34 -29 -31 -24 -27 -32 -29 -25  -21 -19 -15 -15 -18  -2  15  15
13    0 -12 -11 -14  -8  -6  -2  -2    1   0  -1   2   3   2   2   4    4   7   1   0   1   8   8   5
14    5  -1  -1   9   6   7   8   7    6   7   6   1  -2  -1   0   4    4   5   4  -2  -4  -2   1   9
15   16   8   8  16  25  25  24  16    8   8   2   1   0   1  -2  -4   -5  -2  -6  -5   4   7   2   1

16    2   1  -6 -23 -32  -9  -6   1   -4 -11 -10 -15 -11  -2   5  -3   -7 -14 -12  -3  -5 -10 -13 -12
17   -6 -31 -63 -83 -88 -92 -74 -70  -67 -61 -52 -46 -48 -47 -47 -51  -50 -49 -45 -43 -43 -38 -28 -23
18  -25 -28 -33 -35 -34 -28 -27 -32  -31 -28 -26 -22 -21 -20 -14 -11   -9 -10 -11  -9  -8  -7  -9 -10
19   -9  -9 -12 -13  -9  -1  -4  -8  -10 -12 -10  -4  -4  -6  -7  -7   -8  -8  -8  -7  -5  -4  -5  -6
20   -5  -5  -7 -10  -7  -4  -5  -7   -8  -6  -8  -9  -9  -7  -5  -3   -3  -1  -1  -3  -3  -5  -7  -9

21   -9  -9  -7  -2   1  -3  -5  -5   -5  -9  -7  -3   0   0   0   1   -2  -2  -1   1   3   4   3   4
22    8   8   8   9   7   7   7   5    3   3  -2  -6  -7  -7  -5  -5   -8  -9 -10  -2   1   6  10  10
23    7   7   6   5   9   5   7   4   -2  -1  11  14  16  14  14  16   12  22  28  36  20  28  20  14
24    4  17 -13-106-128-130-121-130 -147-142-110-103-110-102 -95 -95  -94 -94 -98 -88 -72 -67 -69 -70
25  -68 -73 -71 -59 -60 -57 -59 -61  -65 -68 -63 -64 -63 -58 -53 -55  -58 -61 -63 -58 -53 -47 -43 -39

26  -39 -43 -44 -47 -39 -38 -37 -38  -40 -28 -29 -30 -33 -37 -44 -48  -49 -36 -35 -28 -19 -16 -14 -14
27  -22 -22 -20 -23 -21 -16 -15 -16  -21 -26 -29 -28 -18 -14 -19 -21  -25 -28 -24 -21 -25 -29 -24 -21
28  -23 -27 -27 -28 -20 -16 -17 -17  -21 -19 -14 -19 -15 -17 -16 -14  -13 -17 -24 -29 -30 -38 -28 -24
29  -25 -22 -22 -24 -24 -23 -24 -28  -29 -22 -18 -12  -6  -5  -2  -3   -1 -15 -27 -36 -45 -54 -45 -41
30  -34 -33 -38 -40 -38 -37 -40 -40  -30 -24 -30 -29 -25 -23 -27 -20  -23 -24 -25 -24 -27 -31 -25 -25

31  -20 -19 -22 -26 -27 -25 -22 -23  -24 -22 -21 -21 -20 -17 -17 -15  -16 -18 -18 -16 -13 -13 -11 -10