火山性地殼変動 (III) : 姶良カルデラ周辺の地殻変動と桜島の火山活動

概要

論文の詳細を見る
The vertical deformations of the earth's crust in the vicinity of Aira Caldera were studied from the results of precise levelling surveys and observations of the sea level by means of tide gauges. Relative vertical deformation of Volcano Sakura-jima in recent years were obtained from the continuous observation data of the mean sea level between Kagoshima and Hakamagoshi. Upheaval movements of Volcano Sakura-jima were also revealed from the results of precise levelling surveys around Kagoshima Bay run in 1960 and repeated in 1962. Those two results were not so contradictory to the amount of the vertical displacements between Kagoshima and Volcano Sakura-jima. The great Sakura-jima eruptions in 1914 was followed by abnormal changes in the height of the mean sea level of Kagoshima Bay. In recent years, the relative elevation of B. M. 2474 was recovering as high as that had been in 1891 before the great eruptions in 1914. Those facts may suggest the gradual accumulations of the powerful volcanic tension under the center of Aira Caldera.
特定非営利活動法人日本火山学会の論文
1967-08-01