Project addresses critical phenomenology questions on the generation and propagation of seismic and low frequency acoustic energy from a wide variety of shallow sources that impact the use of observations for source identification, location and characterization in areas with little groundtruth. The study is done in Utach and Nevada a region with a variety of sources and an area where ground truth is available to develop models and test. The program augmens the existing Utach seismic network with 3 infrasound arrays and 14 single infrasound statins; analyes the Utah catalog and ground truth databaseto produce calibrated library of seismic and infrasound signals from a wide variety of sources ( mines,planned explosions, demolitions,etc); investigates the relationship between infrasound and earthquakes; adds a set of dense infrasound and seismic measurements to explosion at the Air Force Test Range.