The application of geochemical methods in earthquake prediction in China
- Creators
- Fong-liang, Jiang
- Gui-ru, Li
Abstract
Several geochemical anomalies were observed before the Haichen, Longling, Tangshan, and Songpan earthquakes and their strong aftershocks. They included changes in groundwater radon levels; chemical composition of the groundwater (concentration of Ca^(++), Mg^(++), Cl^−, SO_4= and HCO_3− ions); conductivity; and dissolved gases such as H_2, CO_2, etc. In addition, anomalous changes in water color and quality were observed before these large earthquakes. Before some events gases escaped from the surface, and there were reports of "ground odors" being smelled by local residents. The large amount of radon data can be grouped into long‐term and short‐term anomalies. The long‐term anomalies have a radon emission build up time of from a few months to more than a year. The short‐term anomalies have durations from a few hours or less to a few months.
Additional Information
© 1981 American Geophysical Union. Paper number 1L0589. Received February 12, 1981; accepted March 31, 1981. The authors wish to thank Professor T. A. Tombrello and the staff of the W. K. Kellogg Radiation Laboratory for providing facilities during our visit to the United States. We thank Dr. M. H. Shapiro for his comments and advice concerning this paper, and we thank Ms. H. Marr for drawing several of the figures.Attached Files
Published - Fong-liang_et_al-1981-Geophysical_Research_Letters.pdf
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Additional details
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- 91701
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- CaltechAUTHORS:20181212-091128557
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2018-12-12Created from EPrint's datestamp field
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2021-11-16Created from EPrint's last_modified field