根尾谷断層と濃尾地震
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概要
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A great earthquake occurred in Central Japan on October 28th, 1891, when a great fault appeared. As the earthquake caused disastrous damage in Mino and Owari provinces especially, it was called the Mino-Owari earthquake or Nobi earthquake. The fault became later called the Neodani fault, because remarkable crustal movements appeared in Neodani region. At present, in 84 years after that time, it has been proved that the source of an earthquake is a fault. Moreover, some detailed surveys of the Neodani fault were carried out, some models of thc faulting process were proposed and an analytical reappearance of the Nobi earthquake has been put to the test. In this paper, thc author describes the process of the investigation mentioned above, some of the figures of the fault well preserved now, detailed distribution of the seismic intensity of the Nobi earthquake by means of the data of damage in which unprinted data are contained and the distributions of foreshocks and aftershocks of the Nobi earthquake. He explains in this way the magnitude and the characteristics of the Nobi earthquake and points out some problems on future investigation which are contained in the Neodani fault.
- 1976-03-25