Abstract
After the disastrous 1995 Kobe earthquake, a new national project
has started to drastically improve seismic observation system in
Japan. A large number of strong-motion, high-sensitivity, and broadband
seismographs were installed to construct dense and uniform networks
covering the whole of Japan. The new high-sensitivity seismograph
network consisting of 696 stations is called Hi-net, while the broadband
seismograph network consisting of 71 stations is called F-net. At
most of Hi-net stations strong-motion seismographs are also equipped
both at depth and the ground surface. The network of these 659 stations
with an uphole/downhole pair of strong-motion seismographs is called
KiK-net, while another network consisting of 1034 strong-motion seismographs
installed at the ground surface is called K-NET. Here, all the station
numbers are as of April 2003. High-sensitivity data from Hi-net and
pre-existing seismic networks operated by various institutions have
been transmitted to and processed by the Japan Meteorological Agency
since October 1997 to monitor the seismic activity in and around
Japan. The same data are shared to university group in real time
using satellite communication for their research work. The data are
also archived at the National Research Institute for Earth Science
and Disaster Prevention and stored in their database system for public
use under a fully open policy.
Users
Please
log in to take part in the discussion (add own reviews or comments).