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Relations between Temporal Changes in the Recent Ground Uplift and Seismic Activity in the Izu Peninsula

1981; Seismological Society of Japan; Volume: 34; Issue: 4 Linguagem: Inglês

10.4294/zisin1948.34.4_577

2186-599X

Hiroshi Satō,

earthquake and tectonic studies

Temporal variation in the rate of ground uplift in the Izu Peninsula is investigated minutely using the data of daily mean sealevel at the tidal stations of Ito, Aburatsubo and Manazuru, located along the coast of the Sagami Bay. The following relations between the ground uplift and seimic activity are found in commom in the four recent seismically active periods in Izu, that is, 1) The seismic activity was preceded several months by the ground uplift.2) The rate of the grouud uplift was nearly constant, scarcely affected by occurrence of earthquakes3) The ground uplift ceased at the nearly same time of decay of the seismic activity. These facts may give an important clue to elucidate the mechanism of the recent seismic activity in the Izu Peninsula.