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AGU Fellow Thomas B. Nolan, of Washington, D.C., died on August 2 at age 91.

Nolan was named assistant director of the U.S. Geological Survey in 1944 and served as its director from 1956 to 1965. During his tenure as director, the USGS began an evaluation of the effects of underground nuclear explosions at the Nevada Test Site, expanded the study of natural hazards—particularly earthquakes and volcanos, began training astronauts in geology, undertook photogeologic mapping of the Moon, took on the design and operation of the national network for collecting water data, and began a program of marine studies to evaluate potential offshore mineral resources. Nolan stepped down in 1965 to return to being a research geologist.