Construction of Quasi-Real-Time Observation System for Earthquakes at (Uninhabited) Islands and Its Experimental Observation

（无居民）海岛地震准实时观测系统建设及实验观测

• 批准号: 14540398
• 负责人: GOTO Kazuhiko
• 金额: $ 1.98万
• 依托单位: Kagoshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14540398/
• 关键词: Observation System for Earthquakes; Data-Logger; Real-Time-Observation; Island; Uninhabited Island; Satellite Mobile Phone; Solar Battery

Quasi-real-time system for observation of earthquakes at island including uninhabited one was constructed. The observed waveform data are collected to observatory from seismic station by satellite mobile phone automatically for all the earthquakes detected by the existing seismic network. This system is composed by the equipment at seismic station and the controlling software at observatory. The command of request (onset time, length of time window and component of waveform data) is made at observatory on referring to the triggered-information in the existing network system and is sent to station. At seismic station, the observed data are recorded continuously on data logger, in which the clock is managed by GPS. Cutting data from the successive records is put into practice at the reception of the command and the extracted data are transmitted to observatory together with the log-files of power supply, time correction by GPS and temperature within the equipment. The power is supplied by solar and car batteries. For saving power, for example, it is supplied to satellite mobile phone only at the preset time of communication to observatory. One of the characteristics of equipment is the function of self-recovery, the greater part of works stop at the shortage of electric power and restart when the power is recharged. This is advantageous for maintenance free. Experimental observation of the present system was carried out at the uninhabited island, Yokoate-jima, at the southern, end of Tokara-islands, Japan. This experiment was operated well and the present system was confirmed to be valuable for practical usage.

建立了包括无人岛在内的岛屿地震的准实时观测系统。现有地震台网检测到的所有地震，都是通过卫星移动电话自动将地震台站的观测波形数据采集到观测台。该系统由台站设备和台站控制软件组成。根据现有网络系统中的触发信息，在台站发出请求指令（起始时间、时间窗长度和波形数据分量），并发送到台站。在地震台站，观测数据连续记录在数据记录仪上，其中时钟由GPS管理。接收到指令后，对连续记录进行数据切割，并将提取的数据与电源日志文件、GPS时间校正日志文件和设备内部温度日志文件一起传输到天文台。电力由太阳能和汽车电池提供。例如，为了节省电力，只在与天文台通信的预设时间向卫星移动电话供电。设备的特点之一是具有自恢复功能，大部分工作在电力不足时停止，充电时重新启动。这有利于免维护。本系统的实验观测是在日本托卡拉群岛南端的无人岛横船岛进行的。实验运行良好，证明了该系统具有实际应用价值。