Several kinds of geochemical anomaly before strong earthquakes have been observed in China since 1966. They include changes in groundwater radon levels, ion content of water (Ca+2, Mg+2, Cl−, SO 4 −2 , F−), dissolved gases (H2, CO2), and gases escaping from the aeration zone through abandoned dry wells (Ar, N2, CO2). The radon anomalies may be grouped as long-term and short-term anomalies. Most of the geochemical anomalies observed are characterized by a pattern of increase. The largest amplitude recorded was 37 times the base level. Preliminary study indicates that the types of seismogeochemical anomaly observed prior to strong earthquakes depend on tectonic, geologic, lithologic, and hydrogeological conditions at the monitoring station. Results obtained from modelling experiments on the mechanisms of some anomalies are given.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
This is the net price. Taxes to be calculated in checkout.
Jiang Fongliang, andLi Guiru (1981a),The Application of Geochemical Methods in Earthquake Prediction in China, Geophys. Res. Lett.8, (5), 469–472.
Jiang Fongliang, andLi Guiru (1981b),Experimental Studies of the Mechanisms of Seismo-geochemical Precursors, Geophys. Res. Lett.8, (5), 473–476.
Meng Shude et al., (1979),On the Problems of Hydrogeochemical Prediction of Earthquakes from a Few Events, Geology and Seismology,1, (4), 61–73 (in Chinese).
Shi Huixin et al. (1980),The Anomalies in Shallow Groundwater and Gas in Beijing Area and the Tangshan Earthquake, Bulletin of Seismology,2(1) (in Chinese).
State Seismological Bureau (1982),1976 Tangshan Earthquake, Seismology Press, Beijing (in Chinese).
Wang Jihua, andZhang Peiren (1982),The Mechanism of H 2 Anomalies Before and After the M 6.9 Ninghe Earthquake, Scientific Research of Seismology, No. 2, 52–54 (in Chinese).
About this article
Cite this article
Guiru, L., Fongliang, J., Jihua, W. et al. Preliminary results of seismogeochemical research in China. PAGEOPH 122, 218–230 (1984). https://doi.org/10.1007/BF00874595
- Large Amplitude
- Monitoring Station
- Strong Earthquake