Hi-net: High sensitivity seismograph network, Japan
Hi-net: High sensitivity seismograph network, Japan
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Hi-net：高灵敏度地震仪网络，日本
DOI：
10.1007/bfb0117698
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
K. Obara
中科院分区：
文献类型：
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作者：
K. Obara
日本的高灵敏度地震仪网络（Hi-net）由约600个地震台站组成，是1995年兵库县南部地震后“地震研究推进本部”项目的一部分，由国立地球科学和灾害预防研究所（NIED）建设和运营。地震台站均匀分布，覆盖整个日本群岛，平均间距为20-30公里。三分量短周期速度地震仪安装在100米或更深的钻孔底部。地震数据经24位A/D转换器数字化后，抽取为27位数据，采样频率为100 Hz。站点通过帧中继网络服务连接到位于筑波的Hi-net数据中心NIED。TCP/IP和SNMP分别用于数据传输和网络管理。这些数据被不断地传输到日本气象厅的数据中心和地方办事处，用于地震活动的日常监测。数据接收、监控、处理和归档系统由数据中心中的数据库管理系统控制。地震事件检测、震相拾取、震源定位、频谱分析、波形参数提取等全过程自动完成。事件信息和连续波形数据可通过万维网获得。
The high sensitivity seismograph network in Japan (Hi-net), composed of around 600 seismic stations, is a part of the project made by ‘The Headquarter for Earthquake Research Promotion’ after 1995 Hyogoken-nanbu Earthquake and has been constructed and operated by National Research Institute for Earth Science and Disaster Prevention (NIED). Seismic stations are distributed homogeneously covering whole Japan Islands with an average spacing of 20–30 km. Three-component short period velocity seismometers are installed at the bottom of boreholes with depth of 100 m or deeper. Seismic data are digitized by 24-bit A/D converter and decimated to 27bit data with the sampling frequency of 100Hz. Stations are connected to the Hi-net data center, NIED in Tsukuba by a frame relay network service. TCP/IP and SNMP are used for data transmission and network management, respectively. The data are continuously transmitted to the data center and local offices of Japan Meteorological Agency for routine monitoring of seismic activity. The data receiving, monitoring, processing, and archiving system is controlled by a database management system in the data center. Event detection, phase picking, hypocentral determination, spectra analyses, and extracting waveform parameters are processed automatically. Event information and continuous waveform data are available through the world-wide-web.