R o e l S n i e d e RW.M. Keck Distinguished Professor of Basic Exploration Science, Colorado School of Mines

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May 30, 2012 at 4:15 pmTime-lapse changes in the subsurface or laboratory studies reveal how earth materials are behaving. Seismic or ultrasonic waves that are extremely complicated can successfully be used to extract time-lapse changes. Coda waves that are strongly scattered can be used to measure velocity changes as small as 0.1 percent. Professor Snieder will show how such measurements can be used to unravel reversible and irreversible changes in rock samples.

DISTINGUISHED

SPEAKERS E R I E S

THE STANFORD EARTH SCIENCES

The shear-wave velocity in the near surface before (left map) and after (right map) the 2011 Tohoku-Oki earthquake. The right map shows the change in the shear-wave velocity after the earthquake.

Huang Engineering Center Mackenzie Room (3rd Floor) 475 Via Ortega

Reception immediately following lecture.

Roel Snieder holds a master’s degree in geophysical fluid dynamics from Princeton University and a PhD in seismology from Utrecht University. In 1993 he was appointed as professor of seismology at Utrecht University,

and served as dean of the faculty of Earth sciences from 1997 to 2000, when he joined the faculty of the Colorado School of Mines. He is the author of the textbooks A Guided Tour of Mathematical Methods for the Physical Sciences and The Art of Being a Scientist.