active tectonic processes such as continental transform systems with extensional, strike-slip, and contractional regimes. EarthScope will provide velocity field data, portable and continuous GPS data, fault-zone drilling and sampling, reflection seismology, modern seismicity, pre-Holocene seismicity, and magnetotelluric and potential field data for a better understanding of continental deformation. A few questions hoping to be answered by EarthScope include: What are the fundamental controls on deformation of the continent? What is the strength profile(s) of the lithosphere? What defines tectonic regimes within the continent? Continent Structure and Evolution Earth's continents are compositionally distinct from the oceanic crust. The continents record four billion years of geologic history, while the oceanic crust gets recycled about every 180 million years. Because of the age of continental crusts, the ancient structural evolution of the continents can be studied. Data from EarthScope will be used to find the mean seismic structure of the continental crust, associated mantle, and crust-mantle transition. Variability in that structure will also be studied. EarthScope will attempt to define continental lithosphere formation and continent structure and to identify the relationship between continental structure and deformation. A few questions hoping to be answered by EarthScope include: How does magmatism modify, enlarge, and deform continental lithosphere? How are the crust and lithospheric mantle related? What is the role of extension, orogenic collapse, and rifting in constructing the continents? Faults and Earthquake Processes EarthScope is acquiring 3D and 4D data that will give scientists a more detailed insight into faulting and earthquakes than ever before. This project is providing a much needed data upgrade from work done in previous years thanks to many technological advances. New data will enable an improved study and understanding of faults and earthquakes that will increase our knowledge of the complete earthquake process, allowing for the continued development of building predictive models. Detailed information on internal fault zone architecture, crust and upper mantle structure, strain rates, and transitions between fault systems and deformation types; as well as heat flow, electromagnetic/magnetotelluric, and seismic waveform data, will all be made available. A few questions hoping to be answered by EarthScope include: How does strain accumulate and release at plate boundaries and within the North American plate? How do earthquakes start, rupture, and stop? What is the absolute strength of faults and the surrounding lithosphere? Deep Earth Structure Through the use of seismology, scientists will be able to collect and evaluate data from