Deployment of New Strong Motion Seismographs of K-NET and KiK-net
Deployment of New Strong Motion Seismographs of K-NET and KiK-net
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DOI：
10.1007/978-94-007-0152-6_12
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发表时间：
2011-01-01
期刊：
影响因子：
--
通讯作者：
Fujiwara, H.
中科院分区：
文献类型：
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作者：
Aoi, S.;Kunugi, T.;Fujiwara, H.
1995年兵库县南部（科比）地震后，日本国立地球科学防灾研究所（NIED）建立了K-NET和KiK-NET两个强震台网。这些网络统一覆盖全国，台站之间的间隔约为20-25公里，台站总数约为1，700个。为了掌握城市或市中心地区的危险（地面运动），K-NET的大多数站点位于公共办公室、学校和公园，并在自由表面安装了三分量加速度计。另一方面，KiK-net站点位于安静的地方，以避免人为噪音。每个KiK-net台站都有一个100米或更深的井眼，在地面（井上）和井眼底部（井下）都安装了强震地震仪。最近，根据对更快的危险信息的要求，K-NET和KiK-net的所有仪器都进行了更新，包括更换地面加速计，新的记录仪，以及在台站和筑波数据管理中心（DMC）之间建立新的数据收集系统。新研制的仪器具有实时性强、可测范围大、噪声低等优点，是目前强震动测量领域的前沿技术。本文介绍了新一代的K-NET和KiK-net系统。
Following the occurrence of the 1995 Hyogoken-Nanbu (Kobe) earthquake, National Research Institute for Earth Science and Disaster Prevention (NIED) has constructed two strong motion seismograph networks, K-NET and KiK-net. These networks cover uniformly the country with an inter-station interval of about 20-25 km, and a total number of the stations is about 1,700. To grasp the hazard (ground motion) of urban or downtown areas, most stations of K-NET are located in public offices, schools and parks, and a three-component accelerometer is installed on the free-surface. On the other hand, KiK-net stations are located in quiet places to avoid the artificial noise. Each KiK-net station has a borehole of 100 m or more in depth and strong motion seismographs have been installed both on the ground surface (uphole) and at the bottom of the boreholes (downhole). Recently, based on the request for quicker hazard information, all instruments of the K-NET and KiK-net have been renewed by including the change of accelerometers at the surface, new recorders, and also a new data collection system between stations and the Data Management Center (DMC) in Tsukuba. The newly developed instruments, which are state of the art in strong motion instrumentation, have several advantages such as real-time capability, larger measurable range and lower noise. This paper explains the new generation system of K-NET and KiK-net.