In this paper, we report a preliminary result of the Magnetotelluric investigation Mogod area. The region is one most prominent fields for geophysical study since includes young and active faults geothermal activities. We conducted magnetotelluric measurements at 20 sites during field seasons in 2018-2021 as pilot survey to understand data property electromagnetic noise level detailed studies. ...

The Ca na dian Cor dil lera, where the Juan de Fuca oce anic plate is cur rently be ing subducted be neath the North Amer i can con ti nent, is com prised of oce anic and is land arc ter ranes accreted to the west ern edge of an ces tral North Amer ica since the Neoproterozoic (Gabrielse and Yorath, 1991; Mon ger et al., 1972; Mon ger and Price, 1979; Mon ger et al., 1982). The Me so zoic Necha...

Int erp retation of magneto telluri c data over inhomogeneous geolog­ ical st ructures is st ill a challenging problem in geophysical exploration. We have developed a new 3-D MT inversion method and a computer code based on full nonlinear conjugate gradient inversion and quasi­ analyt ical approximation for forward modeling solut ion. Appli cat ion of the QA approximation to forward model ing a...

The problem of expressing a general 3-D magnetotelluric (MT) impedance tensor in the form of a 2-D tensor that has been distorted in some way is addressed first in terms of a general theorem. This theorem shows that when the real and quadrature parts of a tensor are analyzed separately as distinct matrices, all that is necessary to make a matrix with 2-D characteristics from one with 3-D charac...

A model of the electrical resistivity of Mt. Vesuvius has been elaborated to investigate the present structure of the volcanic edifice. The model is based on electrical conductivity measurements in the laboratory, on geophysical information, in particular, magnetotelluric (MT) data, and on petrological and geochemical constraints. Both 1-D and 3-D simulations explored the effect of depth, volum...