Here is a declustered earthquake catalogue that can be used for earthquake forecast experiments/tests in Sichuan- Yunnan region (25.0?~35.0?N; 97.0?~110.0?E) from 1977 to May 12, 2008, before the WenchuanMS8.0 earthquake, with cutoff magnitude ML3.0.
The declustering of the original earthquake catalogue(cat_chundian.txt) utilizes the space-time ETAS model developed by zhuang (2002), and a probability file (probs.dat)obtained. In the second column of the prob.dat, the probability (0~1) of each earthquake as an independent earthquake/background earthquake is given. So, you can select the background earthquake events according to your own defined criterion whether its probabilityis larger than a prescribed threshold value(for example, 0.5),or using the ‘probability weighted’ catalogue, that is, the probability as the weight of a certain physical quantity corresponding to each earthquake event (Jiang and Wu, 2011; 2013).
[01] Zhuang, J., Ogata, Y. and Vere-Jones, D. (2002). Stochastic declustering of space-time earthquake occurrences. J. Amer. Stat. Assoc., 97: 369~380.
[02] Jiang, C. S. and Wu, Z. L. (2011). PI forecast with or without de-clustering: an experiment for the Sichuan-Yunnan region. Nat. Hazards Earth Syst. Sci., 11(3): 697~706, doi: 10.5194/nhess-11-697-2011.
[03] Jiang, C. S. and Wu, Z. L. (2013). Intermediate-term medium-range precursory accelerating seismicity priori to the May 12, 2008, Wenchuan earthquake. Pure appl. Geophys., 170(1): 209~219, doi: 10.1007/s00024-011-0413-0.
