2006 年 3 巻 p. 9-18
Data pertaining to geophysical exploration have increased substantially and drastically in recent decades due to the acquisition of various global data sets. Both the accuracy of measuring devices and the associated analytical techniques are being constantly improved. We can obtain densely spaced, real-time data from underneath oceanic basements by using oceanographic observation networks. The IFREE (Institute for Research on Earth Evolution) plate dynamics research project has accumulated crustal data by using ocean-bottom seismometers (OBSs), a multichannel seismic (MCS) reflection system, bathymetry data by multi-beam swath system, potential data via a gravity meter and a shipboard towing proton and onboard three component magnetometers. In order to investigate tectonic structures and reveal the causal relationship between the occurrence of interplate earthquakes and the structures, these seismic data and geophysical data are processed and added to an internal database. In this paper, we propose the opening of a publication site by first targeting some of the velocity structural models obtained from OBS data analyses and MCS profiles after time-domain processing. The potential field data of gravity and magnetics along seismic lines are also provided through the user access point. This database can be useful and efficiently contributed for proponents to prepare scientific proposals for the Integrated Ocean Drilling Program (IODP).
