Contents Preface Chapter 1 An Overview of Space-time Symmetry of Major Natural Disasters 1 1.1 A Review of Research on Space-time Symmetry of Disasters 1 1.2 Research Content, Research Objectives and Key Scientific Problems to Be Solved 4 1.3 Research Approach and Feasibility Analysis 7 1.4 Progress in Disaster Symmetry Research 10 1.5 Preliminary Analysis of Natural Commensurability and Its Mechanisms.21 Bibliography 28 Chapter 2 Space-time Symmetry of Strong Earthquakes in the Western Paci- fic30 2.1 Symmetrical Space-time Structures of Strong Earthquakes in the Western North Pacific 30 2.2 Symmetrical Space-time Structures of Strong Earthquakes in the Indonesian Island Arc 38 2.3 Symmetrical Space-time Structures of Strong Earthquakes in Fiji 45 2.4 Symmetrical Space-time Structures of Strong Earthquakes in Taiwan, China 52 Bibliography 85 Chapter 3 Space-time Symmetry of Strong Earthquakes in the Eastern Paci- fic 89 3.1 Space-time Symmetry of Strong Earthquakes in Mexico 89 3.2 Space-time Symmetry of Strong Earthquakes in Chile 99 3.3 Space-time Symmetry of Strong Earthquakes in Alaska, USA .105 Bibliography 113 Chapter 4 Space-time Symmetry of Strong Earthquakes in the Western Eura- sian Seismic Belt 115 4.1 Space-time Symmetry of Strong Earthquakes in Italy 115 4.2 Space-time Symmetry of Strong Earthquakes in Iran 122 Bibliography 130 Chapter 5 Space-time Symmetry of Earthquakes in Mainland China and Its Adjacent Area 131 5.1 Space-time Symmetry of Strong Earthquakes in Sichuan-Yunnan Region, China 131 5.2 Space-time Symmetry of Earthquakes in Xinjiang, China and Its Adjacent Area 152 5.3 Space-time Symmetry of Earthquakes in the Himalayas 189 5.4 Space-time Symmetry of Earthquakes in the Fen-Wei Basin 215 5.5 Time Symmetry of Earthquakes in Beijing-Tianjin-Tangshan Region,China 255 Bibliography 265 Chapter 6 Research Results: A Collection of Verified Cases 270 6.1 Trend Judgment of Natural Disasters in the Exploration Stage 270 6.2 Trend Judgment of Major Natural Disasters in the Research Stage 271 6.3 A Summary of Research on Trend Judgment of Major Earthquakes275 Bibliography 276