Gravity Changes in the Eastern Part of Izu Peninsula during the Period of 1975-1976
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概要
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A remarkable crustal uplift covering an area of about 30 km across was found by leveling resurveys over earthquake swarm epicenters in the eastern part of Izu Peninsula . The top of the uplift has amounted to 15 cm during the period of 1969-1976 . The repeatedly-made precise gravity surveys also detected gravity decrease with a rate of about 3 μgals/cm, i.e., the free-air rate, which can be interpreted as a dilatancy generation in the crust. The gravity-decreasing area has been gradually extended in a N-S direction. This fact may indicate the dilatancy diffusion due to the compression by a continuous westward motion of the Philippine Sea plate.
- 日本測地学会の論文
日本測地学会 | 論文
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