Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Yoshimura, Kimitaka*; Sakashita, Susumu*; Okubo, Shuichi*; Yamane, Kazunobu*; Seya, Masami
Shadan Hojin Butsuri Tansa Gakkai Dai-115-Kai (Heisei-18-Nendo Shuki) Gakujutsu Koenkai Rombunshu, p.209 - 212, 2006/10
3D MT inversion development has been conducted to solve issues in electromagnetic exploration in the radioactive waste disposal area. Radioactive Waste Management Funding and Research Center (RWMC) operated field work to confirm how the 3D inversion code worked in low resistivity geology at Horonobe area, Hokkaido in 2005 and applied the code to AMT data. Data suggests possibility to estimate salinity of groundwater in the area of lower resistivety than 1ohm-m.
Moriya, Hirokazu*; Niizato, Tadafumi; Kitamura, Itaru*; Hotta, Hikaru*; Ohara, Hidefumi
no journal, ,
The source locations of earthquakes at the Horonobe area, north of Hokkaido, Japan have been relocated by using the multiplet-clustering analysis (MCA) to identify the subsurface structures and to reveal the mechanism of earthquakes. The absolute source locations of 221 earthquakes were determined by the "hypomh" algorithm to find the overall structures in this area. After that, those earthquakes were classified into 10 groups of multiplets which are the groups of events with very similar waveforms and their source locations have been relocated based on the MCA in order to reveal the fine scale structures. The multiplet-clustering analysis has revealed that the earthquake locations show the structures trending from NS to NNE-SSW with reverse or strike-slip focal mechanism.