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北海道大学地球物理学研究報告 = Geophysical bulletin of Hokkaido University >
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Title: 無人ヘリコプターを利用した樽前山の空中磁気測量
Other Titles: Aeromagnetic survey using an unmanned autonomous helicopter over Tarumae Volcano
Authors: 橋本, 武志1 Browse this author
小山, 崇夫2 Browse this author
金子, 隆之3 Browse this author
大湊, 隆雄4 Browse this author
吉本, 充宏5 Browse this author
鈴木, 英一6 Browse this author
柳澤, 孝寿7 Browse this author
Authors(alt): Hashimoto, Takeshi1
Koyama, Takao2
Kaneko, Takayuki3
Oominato, Takao4
Yoshimoto, Mitsuhiro5
Suzuki, Eiichi6
Yanagisawa, Takatoshi7
Issue Date: 19-Mar-2012
Publisher: 北海道大学大学院理学研究院自然史科学部門(地球物理学)
Journal Title: 北海道大学地球物理学研究報告
Journal Title(alt): Geophysical bulletin of Hokkaido University
Volume: 75
Start Page: 145
End Page: 159
Abstract: The first low-altitude airborne magnetic survey was performed over the summit area of Tarumae Volcano, southwestern Hokkaido, Japan. An unmanned autonomous helicopter was used as the platform for the magnetic survey. Obtained total field anomaly is inverted into a matrix of magnetized prisms, each of which has a uniform magnetization parallel to the present geomagnetic field. Magnetization in the summit atrio ranges from 3 to 8 A/m with an average of 5.3 A/m. The summit lava dome and its vicinity show relatively high magnetization, while the eastern to southwestern part of the atrio is less magnetized. Such variability may be attributed to the difference in magnetization between blocky lava and pyroclastic deposits, as well as to chemical demagnetization due to persistent fumarolic activity at several vents. From the viewpoint of an aeromagnetic survey, high positioning repeatability is one of the most advantageous features of such an unmanned autonomous helicopter. Optimized operation of the system would enable us to detect temporal changes associated with volcanic activity in the future.
Type: bulletin (article)
Appears in Collections:北海道大学地球物理学研究報告 = Geophysical bulletin of Hokkaido University > 第75号

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