Institute of Earthquake Forecasting;
China Earthquake Administration;
Beijing 100036;
China;
School of Earth Sciences and Engineering;
Nanjing University;
Nanjing 210008;
China;
Institute of Geophysics;
China Earthquake Administration;
Beijing 100081;
China;
pattern informatics(PI)algorithm; long-to-intermediate-term forecast; relative intensity(RI)algorithm; relative operating characteristic(ROC)analysis; Yunnan-Sichuan region;