岩手山における空中磁気測量

概要

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We conducted the first aeromagnetic survey at Iwate volcano, northeast of Japan. Our initial and ultimate purpose is detection of geomagnetic changes by repeated aeromagnetic surveys. One cause of geomagnetic secular change is thermal effect due to magnetization changes by heat supply or dissipation. This effect is supposed to be most significant at active volcanic regions. The positioning techniques by satellite system such as GPS have promoted recent years. It becomes more applicable to geomagnetic changes, since such changes are very sensitive against the observed position. We have not carried out sufficient repeated aeromagnetic surveys yet. Iwate volcano, however, is appropriate field for detection of magnetic changes. We introduce the outline of our survey in order to be helpful to figure out the possible problem in the future study. In addition, we discuss at some extent about obtained magnetic anomalies with mainly topography and describe the obtained knowledge at present.
秋田大学の論文
2003-10-31