京都岩倉における地殻変動観測(1) ―降雨の伸縮計,傾斜計に及ぼす影響について―

Abstract

The influence of the precipitation on extensometers and tiltmeters has been investigatedat Iwakura Observatory during the past 16 months.Generally, when we observe crustal deformations for the purpose of prediction ofearthquakes, careful consideration must be given to influences of meteorological changes, especially those of the precipition in our country. At Iwakura Observatory, it is foundthat there exist some simple relations between the precipitation W and linear strains orground-tilts 8~. These relative expressions may be given as the following form.Εi= Wαtexp( - t/τ1) + Wβtexp(- t/τ2).