JOHN DVORAK studied volcanoes and earthquakes for the United States Geological Survey for 16 years. He then operated a telescope atop Mauna Kea in the Hawaiian Islands for 20 years.
He has written articles for several national magazines, including cover stories for Scientific American, Astronomy and Physics Today.
He is the author of three books: Earthquakes Storms, The Last Volcano and Mask of the Sun.
Photo by Tom Peek
The largest eruption of Kilauea in history