Latest Update (11 April 2014)
Added a new function superimposing seamless geological information on Google Maps in the On-Demand version.
See Updates History for details.

General Information
The Visualization System for Subsurface Structures is a system to view subsurface structures beneath active faults in Japan in terms of three-dimensional distributions of physical properties (at the moment, elastic wave velocities only). It provides plots of physical property structures, on scales that encompass both the crust and the upper mantle, superimposed on a variety of geological information. See "About" for details.
The Simple Version (top right) provides links to subsurface structure images plotted along lines that we selected beforehand.
The On-Demand Version (bottom right) allows you to draw lines on your own and plot subsurface structures there. The plotting takes a little more time, but you can use detailed plot settings along any line of your choice.
We are grateful to all copyright holders who have kindly agreed to the incorporation of their data into our system, including tomography data and hypocenter data. The "All-Japan hypocenter catalog by the JMA," which is part of our hypocenter data, is based on the results of collaborative data processing by the Japan Meteorological Agency and the Ministry of Education, Culture, Sports, Science and Technology (the waveform data, used in the data processing, were created on the basis of seismograms provided by: the National Research Institute for Earth Science and Disaster Prevention, Hokkaido University, Hirosaki University, Tohoku University, the University of Tokyo, Nagoya University, Kyoto University, Kochi University, Kyushu University, Kagoshima University, the National Institute of Advanced Industrial Science and Technology, the Geospatial Information Authority of Japan, Aomori Prefecture, Tokyo Prefecture, Shizuoka Prefecture, the Hot Springs Research Institute of Kanagawa Prefecture, Yokohama City, the Japan Agency for Marine-Earth Science and Technology, and the Japan Meteorological Agency (as of 1 April 2008)). The Generic Mapping Tools (Wessel and Smith, 2007) are used to plot subsurface structures.