SEGJ Technical Conference

Geophysical exploration of the mud volcanoes in Tokamachi City Niigata Prefecture

Abstract As the part of the research activities in Waseda University, we conduct the practice of geophysical surveys every summer. In Tokamachi city, Nigata prefecture, which was chosen as the site of the practice for 2012 and 2013, ongoing mud volcanism is evidently confirmed. With a view to evaluate the physical properties of the structure around Murono mud volcano, three methods of geophysical survey: the resistivity survey, the time domain electromagnetic survey and the refraction seismic survey were conducted. We expected that the horizontal spread of mud chamber would be estimated by utilizing long survey lines for each measurement. In addition, a kind of resistivity logging was tentatively performed to examine the shallow resistivities.