Landslides are a significant natural hazard that threaten both human safety and infrastructure. They can cause billions of dollars of damage and thousands of deaths and injuries annually. To reduce the impact of landslides on people and infrastructure it is important to improve our understanding of landslide dynamics and the processes controlling this diversity of behaviors. This CAREER project leverages a unique seismic dataset collected along an active landslide near Yakima in Washington State, the Rattlesnake Ridge landslide. The project will detect and analyze small earthquakes that occurred as the landslide developed and use these to better understand how the landslide evolves and what drives its failure. Because the landslide occurred on land from the Yakama Nation, the project will work closely to inform the Tribal Council and others about results from this research. The project will conduct field trips for students at Heritage University and the Tribal School to understand landslides in the region. The project also supports a graduate student. The Rattlesnake Ridge landslide is a hillslope located in Union Gap, WA that has rapidly destabilized over the last few months. Cracks in the ridge were first identified in late October of 2017 and over a two month period the 3 million cubic meter mass detached from the adjacent hillside and began accelerating downhill. The future behavior of the slide is still uncertain and concerning. This project will perform a comprehen