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December 2025
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Date
 
Space Environment Research Center, Kyushu University 
EDst1h (Realtime Ver.) 
Unit: nT 

December 2025 
 
Universal Time 

DAY       0    1    2    3    4    5    6    7    8    9   10   11   12   13   14   15   16   17   18   19   20   21   22   23 

  1      -2   -9   -7  -10   -7   -9   -9   -9   -6   -3   -3    2  -11  -13   -3  -10   -7   -5  -14  -10   -6   -2   -4   -4 
  2      -9  -12  -17  -18   -9   -8   -7   -9  -12  -14   -7    2    6    4    0   -2    0    0    1    6    0   -1   -3   -4 
  3       1    7    6    4    2    0    4    1   -3   -9  -12   -9  -17  -25  -42  -31  -52  -59  -43  -62  -57  -40  -42  -58 
  4     -74  -59  -68  -71  -62  -59  -59  -58  -44  -35  -34  -31  -37  -28  -45  -49  -36  -26  -38  -38  -26  -23  -18  -18 
  5     -18  -22  -27  -22  -19  -31  -32  -35  -29  -25  -25  -23  -14  -16  -13  -10   -9   -9   -3   -4  -10   -7   -8   -5 

  6     999  999  999  999  999  999  999  999  999  999  999  999  999  999  999  999  999  999  999  999  999  999  999  999 
  7     999  999  -11  -18  -17  -12  -13  -12  -14  -10  -10   -8    4    0    3    3    5    4    4    6    5    4    4    4 
  8       4    0   -3   -4   -4   -6   -6   -7   -7   -7   -8   -5    6    5    3    1   -1   -1   -1    1   -1   -4   -4   -1 
  9       1   -6   -8   -7   -8  -10  -11  -14  -17  -18  -16  -17   -5   -7   -4   -5   -5  -11  -11  -11   -6   -8   -9   -9 
 10      -7  -10  -14  -19  -13   -1   -1   -3   -7   -7   -6  -16   -5   -4  -10  -19  -24  -20    0   -1    1   27   24    0 

 11     -52  -95 -130 -123  -96  -80  -65  -59  -53  -50  -40  -33  -18  -19  -16  -17  -25  -24  -21   -5  -29  -27  -23  -17 
 12     -24  -36  -48  -44  -53  -61  -34  -37  -38  -36  -35  -25  -26  -35  -31  -48  -68  -68  -65  -60  -53  -48  -53  -45 
 13     -40  -54  -60  -48  -41  -36  -29  -26  -23  -19  -14  -10  -14  -10  -15  -20  -21  -23  -22  -13   -4  -10  -10  -11 
 14     -14  -17  -21  -18  -17  -20  -21  -19  -19  -16  -13  -10   -5   -4   -3   -3   -2   -3   -2    3    4    4    4    2 
 15       1   -2   -5   -4   -5   -6   -7  -10   -2    0    3    5    6    1   -3   -6  -10   -3    1    3    6    8   15   18 

 16      19   19    7    7   13   15   10    9    8    8   10   16    8    7    9    7    2   11   17   14    8    9   10   14 
 17       9    5    3   -3   -6   -2   -1    3    2    0    6   13   14    6    9   11    9    6    9   11    9   17   16    2 
 18     -11  -20  -26  -18  -16  -15  -16  -21  -24  -11  -16  -21  -21   -8   -4   -2   -6  -14   -3   -4   -7   -1   -2   -3 
 19      -3   -6  -11  -16  -15  -14  -16  -12   -9   -9   -7   -3    1    0    1   -1   -1   -2   -1   10    6    3   -1    0 
 20       0    0    1    1    2    3   -1    0   -3    0    4   11   17   14   17   10   11   10   18   22   24   22   18   27 

 21      32   18   -7   -9    6    4    5   -1   -7    6    1   -8   -4  -31  -23   -7  -35  -48  -35  -12   -8   -9   -9  -10 
 22     -21  -23  -28  -20  -13  -19  -19   -8  -18  -18  -13   -8   -1   -9  -16  -10  -22  -18  -10   -7   -9   -9  -10   -8 
 23     -13  -11   -4   -9   -9   -7  -14  -18  -17  -11  -10   -7    0  -10    2   -7    2   -5  -12  -14  -16   -8   -9   -7 
 24     -16  -18  -25  -10  -16  -10   -3  -12  -14  -19  -14  -19   -9  -11  -14    0   -7  -13   -5   -1    0   -6   -3   -6 
 25      -7  -10  -19  -16   -1   -7  -13   -2   -3   -2   -5   -8    5    3    1    5   -2   -5    5    4    2    3    3    2 

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

 31      11   11    6    5    1    1   -5  -11   -1    4    2    1    1   -5  -11  -13  -10   -7   -6   -5   -1    1   -1    2 



 
Space Environment Research Center, Kyushu University 
EDst6h (Realtime Ver.) 
Unit: nT 

December 2025 
 
Universal Time 

DAY       0    1    2    3    4    5    6    7    8    9   10   11   12   13   14   15   16   17   18   19   20   21   22   23 

  1      -5   -6   -8   -9   -9   -8   -7   -6   -5   -5   -6   -5   -6   -7   -8   -9   -8   -9   -7   -7   -7   -6   -5   -5 
  2     -11  -11  -12  -12  -11  -11  -10  -10   -8   -6   -3   -1    1    2    2    1    1    1    1    1    0    0   -1   -2 
  3       2    3    4    4    3    2   -1   -3   -5   -8  -13  -19  -23  -29  -38  -42  -48  -51  -52  -50  -50  -55  -54  -53 
  4     -62  -65  -65  -63  -63  -59  -53  -48  -43  -40  -35  -35  -37  -38  -37  -37  -39  -36  -31  -28  -27  -24  -21  -19 
  5     -21  -21  -23  -26  -28  -28  -29  -30  -28  -25  -22  -19  -17  -14  -12  -10   -8   -8   -7   -7   -6   -7   -7   -7 

  6      -6   -5  999  999  999  999  999  999  999  999  999  999  999  999  999  999  999  999  999  999  999  999  999  999 
  7     -15  -16  -15  -14  -14  -14  -13  -12  -11   -8   -6   -4   -1    1    3    3    4    4    5    5    5    4    4    4 
  8       1   -1   -2   -4   -5   -6   -6   -7   -7   -5   -3   -1    0    2    2    1    0    0   -1   -2   -2   -2   -2   -2 
  9      -4   -5   -7   -8  -10  -11  -13  -15  -16  -15  -13  -11   -9   -7   -6   -7   -8   -8   -9   -9   -9   -8   -8   -8 
 10     -11  -12  -10   -9   -8   -7   -5   -4   -7   -7   -8   -8  -10  -13  -14  -13  -13  -11   -3    5    8    1    2    2 

 11     -63  -83  -97  -98  -92  -79  -67  -58  -50  -42  -35  -29  -24  -21  -20  -20  -18  -20  -22  -22  -20  -21  -24  -23 
 12     -32  -37  -45  -46  -46  -44  -43  -40  -34  -33  -32  -31  -33  -39  -46  -53  -57  -61  -61  -58  -54  -50  -48  -47 
 13     -50  -48  -47  -45  -40  -34  -29  -24  -20  -17  -15  -14  -14  -15  -17  -19  -19  -17  -16  -14  -12  -10  -10  -11 
 14     -15  -16  -18  -19  -19  -19  -19  -18  -16  -14  -11   -8   -6   -4   -3   -3   -2   -1    1    2    2    3    3    3 
 15      -1   -2   -4   -5   -6   -6   -5   -4   -2    0    2    2    1   -1   -2   -3   -3   -2    1    5    8   11   13   15 

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

 21      13   10    7    3    0    0    2    1   -1   -2   -7  -10  -12  -18  -25  -30  -27  -24  -24  -20  -14  -11  -11  -12 
 22     -18  -19  -21  -20  -18  -16  -16  -16  -14  -11  -11  -11  -10  -11  -13  -14  -14  -12  -12  -10   -9   -9   -9  -10 
 23      -9   -9   -9   -9  -10  -12  -13  -13  -13  -10   -9   -6   -5   -3   -3   -5   -6   -9   -9  -11  -11  -12  -11  -10 
 24     -14  -15  -16  -14  -13  -11  -12  -12  -14  -15  -14  -14  -11  -10   -9   -8   -7   -4   -5   -5   -4   -4   -4   -5 
 25     -10  -10  -10  -11  -10   -7   -4   -5   -5   -2   -1   -1    0    1    1    1    1    2    1    2    3    3    3    3 

 26       4    4    3    1   -1   -3   -5   -7   -7   -6   -5   -4   -4   -2    1    2    5    7    9   10   10   11   11   11 
 27       7    5    3    2    1    0   -2   -4   -6   -6   -6   -6   -4   -2    0    0    1    3    5    6    7    7    8    8 
 28       2    0   -2   -3   -2   -2   -2   -2   -3   -4   -4   -3   -3   -3   -2   -1    0    2    3    6    8    9    8    5 
 29       3    0   -3   -6   -9  -10  -11  -10   -9   -7   -5   -4   -3   -3   -2   -2   -2    0    2    2    2    3    3    3 
 30       2    2    1    0    0    1    2    3    5    6    6    4    2   -1   -6  -10  -13  -15  -14  -11   -7   -2    2    5 

 31       7    7    6    3    0   -2   -2   -2   -1    0    1   -1   -4   -6   -7   -9   -9   -7   -5   -3   -2    0    1    1 




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