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(The data for this month in the wdc-like format is here.)

                                      WDC for Geomagnetism, Kyoto
                                Hourly Equatorial Dst Values (FINAL)      
                                                MAY   2017
      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    4  -2  -2  -4 -11 -12  -5   0    0   0   1   0  -1   0   0   2    1   0   0  -3  -6  -5  -3  -3
 2   -2  -2   1   0  -6  -2   1   3    0   2   1  -5  -4  -2   2   5    3   2   2   0  -2  -5  -8  -7
 3   -2   1   3   3   3   3   4   3    0  -1  -3  -5  -3   0  -1   2    2   4  -1  -2  -2  -2  -1   1
 4    4   8   8   6   3   5   6   4    3   5   2   2  -1  -2   0   0    0   1   2  12  12   5   6   1
 5   -1  -1   1   8   7   3   1   2    2   2   2   2   1  -2  -4  -3   -2  -1  -1   1   3   4   4   4

 6    6   7  11   8   8  12  10   9   11  15  19  13   9   6   3   5    6   7  10   7   5   3   2   3
 7    3   2   3   0  -4  -4  -2  -5   -6   1   4   3   3   0  -3  -7  -10 -11 -14 -14 -13 -13 -13 -12
 8  -12  -7  -3  -5  -5  -8 -10  -6   -1   2   5   7   7   7   7   2   -3  -6  -5  -4  -7  -8  -6  -5
 9   -5  -3  -1   0  -2  -6  -6  -1    2   5  10   8   8   6  16  24   23  13   8   4  -2  -3   0   1
10    5   6   4   1   0   3   4   3    4   5   5   6   7  10   6   4    7   8   6   4   0   1   0   2

11    8  10  10   9   6  -4   2   3    6   8   7   5   7   7  10   8   11  16  17  14  10  11  11  15
12   18  16  11   7   1   1   3   6    3   7   7   6   2   3   5   3    1  -1  -4  -5  -6  -3   0  -1
13   -2  -2   1  -1  -3   1   6  10   11  11  10  10   8   8   7   8    9   8   5   4   5   8  10   8
14    5   2   7   8  14  14  22  23   26  31  36  27  17  10  11   7    3   3   0   1   9   9  10   9
15    8   8   9  12  14  21  20  21   20   3  -2  -5   3  13  11  15   15  11   8   4   2   5   6   7

16    5   1  -7 -11 -12  -8  -8  -4   -2  -3   0   3   1  -3  -5  -1    1   1   2  -1  -4  -6  -4  -3
17   -1  -2  -1  -2   0   0  -4 -13  -17 -17  -9  -4  -9 -10  -9  -7   -6  -7  -5  -5  -4  -2  -3  -1
18   -4  -7  -5  -9 -26 -35 -31 -24  -18 -17 -12  -9  -9  -8  -6   0    1   1  -1  -3  -4  -2  -1   0
19   -1  -4   0  14  14  19  20  15    3   1   3   6   6   2  -3 -11  -14 -18 -22 -26 -26 -25 -20 -14
20   -8 -18 -32 -27 -18 -17 -23 -36  -44 -31 -30 -30 -31 -40 -40 -30  -27 -29 -32 -29 -32 -31 -27 -25

21  -24 -21 -21 -22 -25 -27 -27 -27  -32 -29 -27 -23 -21 -20 -21 -21  -21 -20 -19 -20 -17 -17 -19 -18
22  -18 -19 -18 -17 -20 -23 -20 -14  -17 -20 -14 -16 -19 -20 -17 -17  -19 -20 -20 -19 -20 -23 -23 -16
23  -13 -15 -21 -25 -24 -25 -21 -17  -15 -15 -12 -13 -17 -18 -19 -18  -15 -15 -16 -15 -16 -17 -15 -13
24  -13 -15 -16 -15 -17 -14 -11  -8   -9 -10 -10  -9 -11 -15 -17 -16  -15 -15 -11  -8  -9 -10 -10 -10
25  -11 -12 -11 -10 -11 -10  -8  -5   -4  -5  -4   0  -1  -4  -3  -3   -4  -4  -5  -7  -8  -7  -7 -11

26  -12 -10  -7  -3   0   2   2   1    0   2   2  -2  -3  -2  -1   0    0   0   0   2   2   0  -1  -4
27   -5  -6  -6  -2  -2   0   1   2    3   3   4   3   2   2   2  10   23  25  29  30  34  35  11 -28
28  -51 -69 -84 -95-102-115-132-146 -130-116-113 -96 -83 -70 -71 -70  -66 -64 -60 -57 -55 -48 -39 -31
29  -28 -26 -25 -25 -25 -23 -21 -18  -14  -8 -11 -13 -11 -13 -22 -33  -37 -39 -42 -40 -40 -38 -34 -32
30  -27 -17 -16 -26 -30 -26 -23 -19  -20 -21 -26 -26 -25 -24 -23 -22  -22 -22 -22 -20 -21 -24 -22 -22

31  -21 -20 -19 -19 -16 -16 -17 -19  -19 -20 -21 -20 -16 -11 -12  -9   -9  -7  -6  -3   0   6  10  11