Ivalo        MAXIMUM TIME DERIVATIVE (0.01 nT/sec) OF HORIZONTAL COMPONENT (X,Y)
 
Time (UT)	    01...03       04...06       07...09       10...12       13...15       16...18       19...21       22...24 
 
2021 12  1	  33  27  32    58  35  39    34  57  37    42  34  21    40  39  28    31  68  30    68 152 390   100  63  69 
2021 12  2	  38  13  10     6  13   5    15  28  21    25  12   9     7  11  11    25  30  21    55  21  71    47  16  16 
2021 12  3	   9   6   8     7   4  17     3  10  12    11   6  11    11  15  39    45  44  31    88  38 198    26   9  10 
2021 12  4	  15  40  32    20  22   9    10  19  15    14  23  18    15  14   6     4   5   7     6  39  14     4  15  14