Fig. 10From: Influence of geomagnetic storms on the quality of magnetotelluric impedanceEvaluation indices in the period of 84Â s using the data observed at site 130 from 00:00 on October 26 to 00:00 on October 31. The data in red correspond to the leverage data associated with the storm. There are preferred directions of the phase difference between the electric and magnetic fields corresponding to the leverage data, as shown in a and cBack to article page