. "Wynn, Jeff"@en . . . . . . . . "Dr Jeffrey C. Wynn (aka Jeff Wynn), is a research geophysicist with the United States Geological Survey (USGS). He is currently based in the Cascades Volcano Observatory [1] in Vancouver, WA, one of the five USGS volcano observatories in the United States[2]."@en . . "Jeff Wynn"@en . . "American geophysicist" . . .