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Curriculum Vitae DON HELMBERGER Professor of Geophysics

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Curriculum Vitae DON HELMBERGER Professor of Geophysics Curriculum Vitae DON HELMBERGER Professor of Geophysics Seismological Laboratory 252-21 California Institute of Technology Pasadena, CA 91125 Tel. (626) 395-6998; Fax (626) 564-0715 Email: [email protected] EDUCATION: B. A. (Geophysics) University of Minnesota (five year curriculum), 1962 M. S. University of California, San Diego, 1965. Ph.D. University of California, San Diego, 1967. PROFESSIONAL EXPERIENCE: Research Associate, Department of Geology and Geophysics, MIT, 1968 Assistant Professor of Geophysics, Princeton University, 1969 Assistant Professor of Geophysics, California Institute of Technology, 1970-1974 Associate Professor of Geophysics, California Institute of Technology, 1974-1979 Professor of Geophysics, California Institute of Technology, 1979 - present. Director, Seismological Laboratory, Caltech, May 1998-May 2003 RECENT HONORS AND AWARDS: First American Geophysical Union recipient of the Inge Lehmann Medal, 1997 Smits Family Professorship, California Institute of Technology, 2000-2011 Medal of the Seismological Society of America, 2002 National Academy of Sciences Member, 2004 RESEARCH INTERESTS: Seismic wave propagation and the inversion of waveforms to recover detailed information about earthquake characteristics and earth structure; particularly interested in mapping ultra-low-velocity zones and possible post-perovskite effects at the Core-Mantle Boundary. PUBLICATIONS: Helmberger, D. V. (1967). Head Waves from the Oceanic Mohorovicic Discontinuity, Ph.D. Thesis, University of California, San Diego, La Jolla, California. Helmberger, D. V. (1968). The crust-mantle transition in the Bering Sea, Seismol. Soc. Am. Bull., 58, No. 1, 179-214. Helmberger, D. V. and G. B. Morris (1969). A travel time and amplitude interpretation of a marine refraction profile, primary waves, J. Geophys. Res., 74, No. 2, 438-494. Helmberger, D. V. and G. B. Morris (1970). A travel time and amplitude interpretation of a marine refraction profile, transformed shear waves, Seismol. Soc. Am. Bull., 60, No. 2, 593-600. Staff and students, Div. Geol. and Planet. Sci., California Institute of Technology, including Helmberger, D. V. (1971). Preliminary seismological and geological studies 1 of the San Fernando, California, earthquake of February 9, 1971, Seismol. Soc. Am. Bull., 61, No. 2, 491-495. Gilbert, F. J. and D. V. Helmberger (1972). Generalized ray theory for a layered sphere, Geophys. J. R. Astron. Soc., 27, 57-80. Helmberger, D. V. (1972). Long-period body-wave propagation from 4o to 13o, Seismol. Soc. Am. Bull., 62, No. 1, 325-341. Helmberger, D. V. and D. G. Harkrider (1972). Seismic Source Descriptions of Underground Explosions and a Depth Discriminate, Geophys. J. R. Astron. Soc., 31, 45-66. Allen, C. R. and D. V. Helmberger (1973). Search for temporal changes in seismic velocities using large explosions in southern California, Proc. Conf. on Tectonic Problems of the San Andreas Fault System, Stanford Univ. Publication, Geol. Sci., XIII, 436-445. Helmberger, D. V. (1973). Numerical seismograms of long period body waves from 17o to 40o, Seismol. Soc. Am. Bull., 68, No. 2, 633-646. Helmberger, D. V. (1973). On the structure of the low velocity zone, Geophys. J. R. Astron. Soc., 34, 251-263. Helmberger, D. V. and R. A. Wiggins (1973). Upper mantle structure of mid-western United States, J. Geophys. Res., 76, No. 14, 3229-3244. Mitchell, B. J. and D. V. Helmberger (1973). Shear velocities at the base of the mantle from observations of S and ScS, J. Geophys. Res., 78, No. 26, 6009-6020. Wiggins, R. A. and D. V. Helmberger (1973). Upper mantle structure of the western United States, J. Geophys. Res., 78, No. 11, 1870-1888. York, J. E. and D. V. Helmberger (1973). Low-velocity zone variations in the southwestern United States, J. Geophys. Res., 78, No. 11, 1883-1886. Burdick, L. J. and D. V. Helmberger (1974). Time functions appropriate for deep earthquakes, Seismol. Soc. Am. Bull., 64, No. 5, 1419-1428. Helmberger, D. V. (1974). Generalized Ray Theory for Shear Dislocations, Seismol. Soc. Am. Bull., 64, No. 1, 45-64. Helmberger, D. V. (1974). Understanding seismograms by constructing numerical models, Engineering and Sci., 38, No. 1, 26-29. Helmberger, D. V. and G. R. Engen (1974). Upper Mantle Shear Structure, J. Geophys. Res., 79, No. 26, 4017-4028. Langston, C. A. and D. V. Helmberger (1974). A procedure for modeling shallow dislocation sources, Geophys. J. R. Astron. Soc., 42, 117-130. Langston, C. A. and D. V. Helmberger (1974). Interpretation of body and Rayleigh waves from NTS to Tucson, Seismol. Soc. Am. Bull., 64, No. 6, 1919-1929. Mellman, G. R. and D. V. Helmberger (1974). High frequency attenuation by a thin high velocity layer, Seismol. Soc. Am. Bull., 64, No. 5, 1383-1388. Wiggins, R. A. and D. V. Helmberger (1974). Synthetic seismogram computation by expansion in generalized rays, Geophys. J. R. Astron. Soc., 37, 73-90. Helmberger, D. V. and S. D. Malone (1975). Modeling Local Earthquakes as Shear Dislocations in a Layered Half Space, J. Geophys. Res., 80, No. 35, 4881-4888. King, D. and D. V. Helmberger (1975). Time functions appropriate for some aftershocks following the Point Mugu, California earthquake of 21 February 1973, Seismol. Soc. Am. Bull., 65, No. 1, 127-132. 2 Mellman, G., L. Burdick, and D. V. Helmberger (1975). Determination of source parameters from long period wave seismograms, Earthquake Notes, 46, p. 44. Heaton, T. H. and D. V. Helmberger (1977). A study of the strong ground motion of the Borrego Mountain, California earthquake, Seismol. Soc. Am. Bull., 67, No. 2, 315- 330. Helmberger, D. V. (1977). Fine structure of an Aleutian crustal section, Geophys. J. R. Astron. Soc., 48, 81-90. Helmberger, D. V. and L. R. Johnson (1977). Source parameters of moderate size earthquakes and the importance of receiver crustal structure in interpreting observations of local earthquakes, Seismol. Soc. Am. Bull., 67, No. 2, 301-313. Hong, T.-L. and D. V. Helmberger (1977). Generalized ray theory for dipping structure, Seismol. Soc. Am. Bull., 67, No. 4, 995-1008. Burdick, L. J. and D. V. Helmberger (1978). The upper mantle P velocity structure of the western United States, J. Geophys. Res., 83, No. B4, 1699-1712. Harkrider, D. G. and D. V. Helmberger (1978). A note on non-equivalent quadruple source cylindrical shear potentials which give equal displacements, Seismol. Soc. Am., Bull., 68, No. 1, 125-132. Heaton, Thomas H. and D. V. Helmberger (1978). Predictability of strong ground motion in the Imperial Valley: Modeling the M = 4.9, November 4, 1976 Brawley earthquake, Seismol. Soc. Am. Bull., 68, No. 1, 31-48. Helmberger, D. V. and G. R. Engen (1978). Fine structure of an oceanic crustal section near the East Pacific Rise, Seismol. Soc. Am. Bull., 68, No. 2, 369-382. Helmberger, D. V. and D. G. Harkrider (1978). Modeling earthquakes with generalized ray theory: Modern Problems in Elastic Wave Propagation, IUTAM Symposium, eds. J. Miklowitz and J. Achenbach, John Wiley & Sons, New York, 499-518. Hong, T.-L. and D. V. Helmberger (1978). Glorified Optics and Wave Propagations in Non-Planar Structure, Seismol. Soc. Am. Bull., 68, No. 5, 1313-1330. Jennings, P. and D. V. Helmberger (1978). Strong motion seismology: Proc. of the Second Int. Conf. on Microzonation, sponsored by UNESCO, 1, 27-41. Mellman, G. R. and D. V. Helmberger (1978). A modified first motion approximation for the synthesis of body wave seismograms, Geophys. J. R. Astron. Soc., 54, 129-140. Burdick, L. J. and D. V. Helmberger (1979). Time Functions Appropriate for Nuclear Explosions, Bull. Seismol. Soc. Am., 69, No. 4, 957-973. Heaton, Thomas H. and D. V. Helmberger (1979). Generalized Ray models of the San Fernando Earthquake, Seismol. Soc. Am. Bull. 69, No. 5, 1311-1341. Helmberger, D. V. and L. J. Burdick (1979). Synthetic Seismograms, Ann. Rev. of Earth and Planet. Sci., 7, 417-442. Helmberger, D. V., G. R. Engen, and P. Scott (1979). A note on velocity, density, and attenuation models for marine sediments determined from multi-bounce phases, J. Geophys. Res., 84, No. B2, 667-671. Helmberger, D. V. and P. C. Jennings (1979). Strong ground motion: Proc. of the Rancho Santa Fe Strong Motion Workshop, sponsored by the National Science Foundation, eds. P. Jennings and D. Helmberger, 102 p. Spudich, P. K. P. and D. V. Helmberger (1979). Synthetic seismograms from model ocean bottoms, J. Geophys. Res., 84, No. B1, 667-671. Hadley, David M. and D. V. Helmberger (1980). Simulation of strong ground motions, Seismol. Soc. Am. Bull., 70, No. 2, 617-630. 3 Helmberger, D. V. and G. R. Engen (1980). Modeling the long-period body waves from shallow earthquakes at regional ranges, Seismol. Soc. Am. Bull., 70, No. 5, 1699- 1714. Given, J. and D. V. Helmberger (1980). Upper mantle structure of northwest Eurasia, J. Geophys. Res., 85, No. B12, 1783-1794. Helmberger, D. V. and D. Hadley (1981). Seismic Source Functions and Attenuation from Local and Teleseismic Observations of the NTS Events JORUM and HANDLEY, Bull. Seismol. Soc. Am., 71, No. 1, 51-67. Lay, T. and D. V. Helmberger (1981). Body wave amplitude patterns and upper mantle attenuation variations across North America, Geophys. J. Roy. Astr. Soc., 66, 691- 726. Stewart, G. S. and D. V. Helmberger (1981). The Bermuda earthquake of March 24, 1978: A significant oceanic intraplate event, J. Geophys. Res., 86, No. B8, 7027- 7036. Wallace, T. C., D. V. Helmberger, and J. E. Ebel (198l). A broadband study of the August 13, 1978 Santa Barbara earthquake, Seismol. Soc. Am. Bull., 71, No. 6, 1701-1718. Wallace, T. C., D. V. Helmberger, and G. Mellman (1981). A technique for the inversion of regional data in source parameter studies, J. Geophys. Res., 86, No. B3, 1679- 1685. Cohn, S. N., T.-L. Hong, and D. V. Helmberger (1982). The Oroville earthquakes: A study of source characteristics and site effects, J.
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