Thomas M. Hearn, Associate Professor

Department of Physics
New Mexico State University
Las Cruces, NM  88003

352b Gardiner Hall
Telephone: (505)-646-5076
Fax:  (505) 646-1934
Email:   thearn@nmsu.edu

Biography - Tom Hearn

B.S. Physics, Univ. of California, Riverside, 1978;
M.S. Geophysics, Caltech, 1980;
Ph.D. Geophysics, Caltech, 1985;

California Seismic Network to find lateral variations in crust and mantle velocity structure in the region. After graduating, Hearn went to Cornell and worked with the COCORP project and did further work in tomography. In 1990, Hearn moved to the Physics department of New Mexico State University. There, he has continued his work in tomography and worked on data sets covering the Turkish-Iranian Plateau, the Western United States, Southern Great Basin, and Europe. Recently, he has extended the tomography to include the effects of anisotropy.

Current Projects - Tom Hearn

INDEPTH-III Tibet Expedition

In summer 1998, 52 seismic stations were installed in central Tibet as part of the INDEPTH-III Project. The stations were removed during the summer of 1999. Click here for pictures of 1998 Tibet Expedition!

Anisotropic Tomography of China

We have been working with the China Seismological Bureau to use network data for the seismic tomography of China.  See our Fall 1999 - American Geophysical Union Poster.

Structure of the Abitibi Archean lithosphere from PASSCAL data

This was a field study conducted the Abitibi Archean Province of Quebec, Canada during 1996. Nearly 30 PASSCAL seismic stations were installed in a north-south profile running from Algonquin Park, Ontario, across the Grenville Front to Selbaie, Quebec. Stephane Rondenay (U. British Columbia) was in charge of the field program and the data analysis as his Ph.D. prjoect.  This project was done in collaboration with Don White of the Canadian Geologic Survey, Marianne Marashal of Ecole Polytechnique, Mike Bostock of U. of British Columbia. Supported by the National Science Foundation International Division.  Click here for pictures of the Abitibi Field Experiement!

Anisotropic Tomography of California

This work is being done with graduate student Anca Rosca and Mike Fehler of Los Alamos National Laboratory. We are using the Pn phase to determine lateral variations in both mantle velocity and anisotropy. Supported by the Institute for Geophysics and Planetary Physics at Los Alamos National Laboratory.

A Brief Bibliography -Tom Hearn

Rondenay, S., M. Bostock, T. Hearn, D. White, H. Wu, G. Senechal, S. Ji, M. Mareschal, Teleseismic studies of the lithosphere below the Lithoprobe Abitibi-Grenville transect, Canadian J. Earth Sci., submitted to Abitibi Transect volume, 1998, will be published when everybody else gets their papers for this volume done.

Rondenay, S., M. Bostock, T. Hearn, D. White, R. Ellis, Lithospheric assembly and modification of the SE Canadian Shield: The Abitibi-Grenville teleseismic experiment, accepted to the Journal of Geophysical Research with minor revisions, April 1999.

Hearn, T., Uppermost mantle velocities and anisotropy beneath Europe, J. Geophys. Res., 104 (#B7), 15,123-15,139, July 10, 1999.

Durrani, B., D. Doser, G. Keller, and T. Hearn, Velocity structure of the upper crust under the San Francisco volcanic field, Arizona, Bull. Seismo. Soc. Am., 89 (#1), 239-249, Feb. 1999.

Tandon, K., L. Brown, & T. Hearn, Deep Structure of the northern Rio Grande Rift beneath the San Luis Basin (Colorado) from a seismic reflection survey: Implications for rift evolution, Tectonophysics 203, nos 1-2, 41-56, 1999.

Mele, G., D. Rovelli, D. Seber, T. Hearn, M. Barazangi, Compressional velocity structure and anisotropy in the uppermost mantle beneath Italy and surrounding regions, J. Geophys. Research, 103,12529-12543, 1998.

Rapine, R., J. Ni, and T. Hearn, Regional wave-propagation in China and its surrounding regions, Bulletin of the Seismological Society of America, 87, 1622-1636, 1997.

Rodgers, A., J. Ni, & T. Hearn, Propagation characteristics of short period Sn and Lg in the Middle East, Bulletin of the Seismological Society of America, 87, 396-413, 1997.

Hearn, T. Anisotropic Tomography in the Western United States, Journal of Geophysical Research, 101, 8403-8414, 1996.

Wu, Jianxin, J.F. Ni, and T.M. Hearn, Lg wave attenuation and propagation characteristics in Iran, in Monitoring a Comprehensive Test Ban Treaty, NATO ASI Volume, Eds., E. Husebye and A. Dainty, 655-662, Kluwer Academic Publishers, 1996.

Hearn, T., A. Rosca, & M. Fehler, Pn Tomography beneath the Southern Great Basin, Geophysical Research Letters, 21, 2187-2190, 1994.

Sandvol, E., J. Ni, T. Hearn, & S. Roecker, Seismic Azimuthal Anisotropy beneath the Pakistan Himalayas, Geophysical Research Letters, 21, 1635-1638, 1994.

Sandvol, E., & T. Hearn, Bootstrapping Shear-Wave Splitting Errors, Bulletin of the Seismological Society of America, 84, 1971-1977, 1994.

Hearn, T., & J. Ni, Seismic Velocities beneath Continental Collision Zones: The Turkish-Iranian Plateau, Geophysical Journal International, v117, 273-283, 1994.

Hearn, T.M., M.N. Beghoul, & M. Barazangi, Tomography of the Western United States from regional arrival times, Journal of Geophysical Research, 89, 1843-1855, 1991.

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