The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
For past ten years, the technology for ocean bottom seismic observation has been greatly developed. As a result, various seismic observations have been carried out around Japan and new geophysical findings are obtained. For sea floor seismic observation, Long-Term Ocean Bottom Seismometer (LT-OBS) and Broad Band OBS (BB-OBS) were developed. As a result of long term observations, precise seismicity...
To install seismometers and tsunami-meters on the sea floor is necessary for monitoring seismic activities of a seismogenic zone. An ocean bottom cable seismometers system (OBCS) is most suitable for this purpose since data can be obtained in real-time. Some systems have been installed over the past 25 years around Japan. Although the existing OBCS systems are useful for the study of seismic activities,...
Planning to make in situ observations of seismic coupling and motion of the Pacific Plate near the Japan Trench (about 200 km from the coast), we deployed three precision acoustic transponders (PXPs) in 2001 on both the Pacific plate (70 km from the trench axis at a depth of 5450 m) and the landward slope (70 km from the axis at a depth of 2800 m). The PXP system was developed for the full ocean depth...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.