抄録
The noise strain associated with precipitation has been eliminated from the strainmeter record of crustal deformation at Inuyama Crustal Movement Observatory. For this purpose we used the record of the N-S strain component which is much affected by the precipitation. It's annual noise strain eq, amounting to 1.0×10-6 approximately, can be expressed in the formεq=aqi+blogqs, where a, b are the constants, qi the spring water (amounts of discharged water) from inner part of the observational gallery, and qs the spring water from the ground surface. The noise strain calculated by the above equation under the known values of a, b, qi, and qs has been subtracted from the original strainmeter record. As a consequence, the noise strain could be reduced to the value less than 20 per cent. The accurate measurements of qi and qs are necessary for the elimination of the noise strain associated with precipitation.
