Study of Deep Sounding Time-Domain Electromagnetic (TDEM) Method Using Horizontal Electric Dipole to Infer Subsurface Resistivity Structure

Wahyu Srigutomo (Earth and Computational Physics Research Group, Department of Physics, Institut Teknologi Bandung, Jl. Ganesa 10 Bandung 40132, Indonesia)
Tsuneomi Kagiyama (Institute for Geothermal Sciences, Graduate School of Science, Kyoto University, Minamiaso, Kumamoto 869-1404, Japan)
Wataru Kanda (Disaster Prevention Research Institute, Kyoto University, Sakurajima, Kagoshima 891-1419, Japan)
Hisashi Utada (Earthquake Research Institute, University of Tokyo, Japan)

Indonesian Journal of Physics (IJP)
Vol 16 No 4 (2005): Vol. 16 No. 4, October 2005

Electromagnetic methods to infer subsurface resistivity structure particularly in volcanic and hydrothermal regions are considered highly effective to apply. Time domain electromagnetic (TDEM) method as one of them, is a robust method utilizing controlled-galvanic source which has higher ability to penetrate deeper structure. This paper tries to elaborate the theoretical formulation of TDEM with a long-grounded current wire for a layered-earth problem, the mathematical inversion algorithm to find the suitable model for interpretation as well as its sensitivity analysis, and the application to synthetic and real measured data.