Features of fractal dimension anomaly of radon content in underground water in North China before and after the 1976 Tangshan earthquake

An, Z. W., Wang, L. Y. and Zhu, C. Z., 1990. The fractal dimension characteristics of seismic activities before and after large earthquakes.Acta Seismological Sinica,3, 293–302.

Hong, S. Z. and Hong, S. M., 1987. Fractal and its application in earthquake science.Earthquake Research in Sichuan,1, 39–46 (in Chinese).

Li, H. H., Zhang, W. X., Zhang, Y. L., Ma, W. J. and Guo, Y. P., 1987. The temporal fractal dimension structure of small seismic activity before the Menyuan earthquake (M=6.4).Northwestern Seismological Journal,9, 4, 15–20 (in Chinese).

Zhang, W., Wang, J. Y., E, X. M., Li, X. H., Wang, C. L. and Li, Z. M., 1988.Hydropgeochemical Principles and Methods in Earthquake Prediction. The Educational Research Press, Beijing 160–185 (in Chinese).

Zhu, C. Z. and Wang, L. Y., 1989. Fractal dimension characteristics of Lingwu earthquake sequence.Journal of Seismological Research,12, 3, 272–276 (in Chinese).