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Detection of volcano-magnetic changes by aero-magnetic survey

航磁探测火山地磁变化

基本信息

批准号：
15403007
负责人：
TANAKA Yoshikazu
金额：
$ 8.26万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

Four persons made a voyage to White Island of the New Zealand, the proton magnetometer was installed in two points, and ground continuation magnetic field observation was started and also SP measurement was performed in 2003 fiscal year.While five persons made a voyage in the 2004 fiscal year and performing recovery of continuation magnetic field data and ground repetition magnetic field observation, the aero-magnetic survey of the airraid altitudes 50m and 100m was carried out with helicopter. Seven persons made a voyage in the Heisei 17 fiscal year, and the repetition magnetic survey in the ground and the air was carried out. Unfortunately, volcanic activity of the White Island was calm and remarkable magnetic change was not detected. However, the observation technical problem about an air magnetism survey was mostly solved through this research.Namely, the positioning of the flight sensor was achieved with installation of highly precise GPS receiver in the ground and a bird. It asks … More with an error 1m or less by carrying out differential analysis. It is necessary to detach 40m to avoid the influence of magnetization of a helicopter to the body, and a bird hanging system is excellent in it. The form and cylinder wings of a bird for obtaining a stable flight have been determined. The highly precise cesium magnetometer has owned at the university. The system which displays a GPS position on a PC screen in realtime, and is used for route guidance has been developed.It is also one of the results that it was able to be shown that a flight experiment can be repeated in the volcano in Aso, Kuju, Sakurajima, Bandai, and Asama ignited by this research, and an air magnetic survey can carry out comparatively easily also by the researcher of a university.The subject which especially catches a volcanic magnetic field change by the air magnetic survey which was the big target of this research has been attained by having obtained the result which detects ground observation and a conformable volcanic magnetic field change of 50nT from the analysis of the air magnetism survey data in 1996 in the Kuju volcano, and 2004.These research results presented in the study group of the ISAG2006 air physics inquiry international symposium held in Tsukuba in January, 2006. Less

2003财年，4人远航新西兰怀特岛，两点安装质子磁强计，开始地面连续磁场观测，并进行SP测量。2004财年，5人远航，进行连续磁场数据恢复和地面重复磁场观测，空袭高度50m和100m的航磁测量是用直升机进行的。平成17年度有7人出航，进行了地面和空中的重复磁力调查。不幸的是，怀特岛的火山活动很平静，没有检测到明显的磁力变化。然而，通过这项研究，大部分解决了航空磁测量的观测技术问题。即通过在地面安装高精度GPS接收机和鸟类来实现飞行传感器的定位。通过进行微分分析，要求误差在1m以下。需要脱离40m以避免直升机磁化对机身的影响，鸟吊系统在其中非常出色。鸟类获得稳定飞行的形状和圆柱翼已经确定。学校拥有高精度铯磁力计。开发了在电脑屏幕上实时显示 GPS 位置并用于路线引导的系统。通过这项研究，可以在阿苏、九重、樱岛、万代和浅间的火山中重复进行飞行实验，并且大学研究人员也可以比较容易地进行空中磁力测量，这也是成果之一。特别是捕获火山磁场变化的课题通过分析 1996 年九重火山和 2004 年的空气磁力测量数据，获得了地面观测和 50nT 的一致火山磁场变化的结果，从而实现了本研究的大目标。这些研究成果在 2006 年 1 月于筑波举行的 ISAG2006 空气物理探究国际研讨会的研究小组上发表。