New insights into geologic and tectonic processes in Alaska and northwestern Canada The northwest of the North American continent is geologically dynamic and tectonically active. A network of seismic and geodetic instruments deployed across the region as part of the EarthScope project provided data crucial to understanding its geological, tectonic, and seismic processes. Tectonics and Seismic Structure of Alaska and Northwestern Canada: EarthScope and Beyond presents review papers and new scientific studies using EarthScope data to advance understanding of the region’s structure, seismic activity, and geodynamic processes. About this volume: Describes the infrastructure and capabilities of the EarthScope seismic and geodetic networksDraws from a comprehensive set of geophysical dataIncludes field studies, laboratory analyses, and numerical modelingSpans processes from the Earth’s interior and the lower mantle to the crust and surfaceCovers examples from subduction zones, fault systems, and some of the largest recorded earthquakesProvides scientific explanations for the natural landscapes and ongoing movements shaping the northwest of the North American continent The American Geophysical Union promotes discovery in Earth and space science for the benefit of humanity. Its publications disseminate scientific knowledge and provide resources for researchers, students, and professionals.