Detectabilities of earthquake precursors using GPS, EDM and strain meters, with special reference to the 1923 Kanto earthquake.

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  • GPS,光波測量とひずみ計による地震前兆現象の検知能力について―1923年関東大地震の結果を用いて―
  • GPS,光波測量とひずみ計による地震前兆現象の検知能力について--1923年関東大地震の結果を用いて〔英文〕
  • GPS コウハ ソクリョウ ト ヒズミケイ ニ ヨル ジシン ゼンチョウ ゲン

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Results by GPS and EDM observations in the case of the 1923 Kanto, Japan, earthquake (M=7.9) are estimated by using horizontal displacements of the first and the second order triangulation stations. It is found that distance and direction of baselines are related to observation value and long distance baselines in the NW-SE direction show larger distance change for this earthquake. Detectabilities by GPS, EDM and continuous strain observations are also compared and discussed. Combination of observations in taking into account their advantage and circumstances is recommended for the earthquake prediction study, though continuous strain observation has about 102 times as better detectability as the others.

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