John Vidale

Background

Vidale was born in Philadelphia, Pennsylvania, United States of America, studied physics and geology at Yale, and obtained his Doctor of Philosophy from Caltech in 1987.

Career

He then held research positions at University of California Santa Cruz and the United States Geological Survey, until he joined University of California, Los Angeles in 1995. In 2006, he moved to Seattle to direct the Pacific Northwest Seismic Network at the University of Washington. He was a Gutenberg Fellow at Caltech and a Gilbert Fellow of the United States Geological Survey. He has studied the relation of Earth tides and earthquakes - finding only the strongest tides noticeably effect the timing of earthquakes, earthquake swarms - finding they are a more general phenomenon than he previously suspected, the inner core - discovering high-frequency seismic waves scattered scattered therein that offer a second line of evidence it is rotating about 0.2 degrees per year, the stronger than expected healing of fault zones after an earthquake, and various details of the seismic structure of the mantle.

Vidale also contributed an improved method of ray tracing which relied on a finite-difference approximation of the eikonal equation and which has been used widely in both earthquake and reflection seismology.

There have been some controversies surrounding his research, including endorsements of risky experiments, misquotes, and mild ridicule as well.

Achievements

• He received the American Geophysical Union"s James B. Macelwane Medal in 1994. Vidale is a Fellow of American Geophysical Union and received American Geophysical Union"s Macelwane Meda