USArray is one key component of EarthScope experiment to explore the formation, structure and evolution of the North American continent. The most important element of the USArray is Transportable and Flexible Array. The transportable Array consists of 400 broadband seismic stations installed across the continental United States and Alaska in a roll-along fashion. With data from this dense network of seismometers, researchers will be able to collect detailed images of the Earth's interior and investigate the processes controlling earthquakes and volcanoes. As the complement of Transportable Array, Flexible Array is available to scientists for dispatching to targeted areas for very detailed and short period studies. During the 5 years since it was started, the data acquired by USArray sensors have been providing the anticipated foundation for scientific community actively gaining new insights into earthquake physics, volcanic processes, core-mantle interactions, active deformation and tectonics, continental structure and evolution, geodynamics, and crustal fluids.