 Working with David Smith from UCSC he also helped establish that TGFs originate from deep within our atmosphere and not at high altitudes as had been previously assumed.Indeed, Dwyer and his team observed a ground level TGF at Camp Blanding in 2004.Finally, using BATSE data from the Compton Gamma-ray Observatory, Dwyer and collaborators discovered Terrestrial Electron Beams (TEBs)  in the inner magnetosphere, which are generated by the high energy emissions from thunderstorms.