A conducting dike has been indicated by magnetotelluric soundings near the area of the maximum intensity of the Berhida earthquake August 15, 1985 supposedly at the crossing of the longitudinal and transversal fractures. The character of the dike well fits to the general structure of the 'Transdanubian Conductivity Anomaly' lying in the area of the Transdanubian Central Range and in its NW foreground. To find the real structure of the dike, different modellings (polarisation study) have been carried out taking into account the relation between the conductors and induction vectors, too. Supposing that graphite and fluid accumulated in the conducting fractures (dikes) and these decrease the bulk resistivity, the high seismic attenuation in the area described by Zsiros  can be explained by the low viscosity of these materials. They play role in the release of the stress accumulation in case of the Berhida earthquake, too. Destruction appears at the brittle wall of the fracture.
|Number of pages||15|
|Publication status||Published - Jan 1 2000|
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