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Science 12 June 1981:
Vol. 212. no. 4500, pp. 1264 - 1266
DOI: 10.1126/science.212.4500.1264
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Articles

Deep-Seated Gas Emission Induced by the Earth Tide: A Basic Observation for Geochemical Earthquake Prediction

RYUICHI SUGISAKI 1

1 Department of Earth Sciences, Nagoya University, Chikusa, Nagoya, Japan

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.

Submitted on December 15, 1980


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Geochemical Indicator of Tectonic Stress Resulting in an Earthquake in Central Japan, 1984.
R. Sugisaki, R. SUGISAKI, and T. SUGIURA (1985)
Science 229, 1261-1262
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Science. ISSN 0036-8075 (print), 1095-9203 (online)