Tracy K.P. Gregg

Tracy Gregg is a volcanologist who studies lava flows on the Earth and elsewhere in the Solar System. As a researcher, her areas of expertise range from Martian volcanoes to lava lakes on the surface of Io, the intensely volcanic moon that orbits Jupiter. She is also interested in the interaction between lava and water, and traveled 2 miles below the surface of the Pacific Ocean in a submarine to study deep-sea lava flows on Earth. She also studies volcanism on the Moon.