Plan. Its aircraft observe volcanic activity in the sea areas of the Nanpo (southern) and Nansei (southwestern) Islands. It conducts aerial magnetic surveys and surveys of ocean floor topography using the auto-navigational buoy "Manbou" to understand the subterranean structure of submarine volcanoes. These surveys help to determine the structure of the earth's crust beneath submarine volcanoes and the location of magmas. In addition, JMSA analyzes data gathered from aircraft and satellites.
