Research Areas Accomplishments Impact Instrument Developement Design and test of spatial filter New sensor design Improved wind noise reduction Nuclear Test Ban Treaty Member of National Academy of Sciences panel to recommend research Support International monitoring system as requested Locations of infrasonic stations in the International Monitoring System Severe Weather Vorticity Detected infrasound from tornadoes and mesocyclones Working to create a rapid deployment observatory Working to install an observatory at a NEXRAD site A conceptual view of tornado detection system Avalanche Detection Deployed observation at Gothic and Silverton, Colorado and verified that avalanches radiate infrasound Made recommendations for design of an avalanche detection system Infrasonic signals on 24 February 1994 from an avalanche on Gothic Mountain, Colorado Earthquake Detection Detected infrasound from earthquake epicenters, local Rayleigh wave passages, and intermediate zones Infrasonic data from the epicenter of the California earthquake of 28 June 1992 measured at the BAO observatory