Areas of Interest: Seismology Exploration physics My principal research area is in use of seismic waveforms to infer source parameters and earth structure although I am interested in a wide range of geophysical methods including field studies. Currently, I have 2 projects with the Mid America Earthquake Center involving wave regional wave propagation within the central and eastern United States. These include investigations of regional waveforms from earthquakes and explosions to determine distance attenuation within the Mississippi Embayment and the effects of the unconsolidated and consolidated basement sediments on site amplification. Another recent project involves linear and non-linear wave propagation within embayment sediments using explosion sources and strong ground motion data funded through the USGS NEHRP program.