focus « Back to Glossary IndexInitiation point of an earthquake or fault movement. Synonyms: hypocenterRelated Articles: 2 Plate Tectonics4 Igneous Processes and Volcanoes5 Weathering, Erosion, and Sedimentary Rocks7 Geologic Time8 Earth History« Back to Glossary Index Author: Chris Associate Professor, Salt Lake Community College, Salt Lake City, Utah View all posts by Chris