- 公益社団法人 日本地震学会
- 地震 第2輯 (ISSN:00371114)
- vol.61, no.Supplement, pp.225-238, 2009-07-31 (Released:2013-11-21)
Owing to significant developments in instrumentations, data processing methods and modeling schemes, prospecting electrical conductivity structure with the aid of the magnetotelluric method has become one of the standard geophysical techniques for elucidating dynamics of subsurface crustal activities such as earthquake occurrence and volcanic eruptions. In this paper, after brief introduction of the magnetotelluric method, recent 10-yaer progress of the method and its experiments in crustal active areas in Japan were reviewed. Since electrical conductivity is especially sensitive to the existence of the interstitial fluids and their connectivity, together with existence of high temperature areas, the survey results deepened our understandings for generation mechanisms of earthquakes, seismic faults, localized strain accumulations and volcanic eruptions.