title: Deep-seated gas emission induced by the Earth tide: a basic observation for geochemical earthquake prediction.
abstract: Variations of the helium/argon ratio of gas bubbles in a mineral spring along a fault zone coincide with fluctuations of areal dilation induced by the earth tide. This observation suggests that deep-seated gases characterized by higher heliumlargon ratios are squeezed out by stress preceding an earthquake.
authors.forename: R
authors.initials: R
authors.lastname: Sugisaki