Unit Affiliation: Seismology, Geology and Tectonophysics, Lamont-Doherty Earth Observatory (LDEO)
I have a long term interest in "geophysical inverse theory", the process of taking data (such as observations of seismic waves) and turning them into images of the interior of the earth. I am interested in all aspects of the subject, including theory and applications. I am the author of a well-cited textbook, on the subject, now in its fourth edition.
OUTCOMES: Various theoretical results and improvements to data processing algorithms. An example is the "cross-convolution" technique that Vadim Levin and I invented, which has gained inportance in the interpretation of receiver functiona nd shear wave splitting data.