| Seismic Wave Radiation, Propagation and Event Location in Laterally Heterogeneous Media |
01 MAY 95 |
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| Authors:
Ari Ben-Menahem; Matthias G. Imhof; Yingping Li; Oleg Mikhailov; William Rodi; MASSACHUSETTS INST OF TECH CAMBRIDGE
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 | Three studies related to nuclear monitoring and discrimination are reported. First, we present a new approach to modeling elastic wave scattering, based on multiple multipole Expansions. Numerical examples demonstrate that the new algorithm is a very general tool for solving relatively large and complex two dimensional scattering. problems. Second, we apply relative event location and waveform cross-correlation techniques to relocate four presumed nuclear explosions at the Balapan, Kazakhstan Test Site. ... |
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| Seismic Wave Propagation, Attenuation and Scattering over Regional Distances |
11 DEC 89 |
98 pages |
| Authors:
Nafi Toksoez; Ari Ben-Menahem; Edmond E. Charrette; Anton M. Dainty; Richard L. Gibson Jr; MASSACHUSETTS INST OF TECH CAMBRIDGE EARTH RESOURCES LAB
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 | The objective of this project was to conduct basic research on the propagation of seismic energy at regional (100-1000 km) distances for purposes of monitoring underground nuclear explosions. The problems studied were the coherency of the seismic S phases, especially Lg, and the implications in terms of the scattering properties of the earth medium; and scattering from anisotropic inclusions. This Final Report consists of preprints of two papers on these ... |
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| Analysis of Regional Phases Using Three-Component Data |
20 NOV 89 |
233 pages |
| Authors:
M. Nafi Toksoez; Ari Ben-Menahem; Anton M. Dainty; Batakrishna Mandal; Michael Prange; MASSACHUSETTS INST OF TECH CAMBRIDGE EARTH RESOURCES LAB
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| The objective of this project was to conduct basic research on the propagation of seismic energy at regional (100 to 1000 km) distances for purposes of monitoring underground nuclear explosions. The problems studied were scattering of seismic body waves by rough interfaces, the effect of anisotropic media on the seismic radiation from sources embedded in them, and the attenuation of crustal phases. This Final Report consists of preprints of four ... |
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| Research in Seismology. |
01 MAR 1976 |
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| Authors:
Ari Ben-Menahem; WEIZMANN INST OF SCIENCE REHOVOTH (ISRAEL) DEPT OF APPLIED MATHEMATICS
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| Research in seismology during the period April 1973 to March 1975 was concerned with the mechanisms and focal processes of Asian earthquakes, meteor impacts, and explosions. The seismicity, tectonics, and structure of the Afro-Eurasian junction, a complex region of relatively low seismic activity was clarified in terms of the breaking of an incoherent plate. Theoretical seismograms for real earth and source models were applied to earthquake dislocation sources and to ... |
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| Seismic Source Identification Techniques. |
31 DEC 1972 |
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| Authors:
Ari Ben-Menahem; ADOLPHO BLOCH GEOPHYSICAL OBSERVATORY REHOVOT (ISRAEL)
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| ;Contents: Residual deformation of real earth models with application to the Chandler wobble; A unified approach to the representation of seismic sources; Theoretical seismograms by realistic sources in flat multilayered earth models - source coefficients and path integrals; Computation of models of elastic dislocations in the earth; A note on the calibration of the electromagnetic seismograph. |
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| Seismic Source Identification Techniques. |
29 JUN 1971 |
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| Authors:
Ari Ben-Menahem; WEIZMANN INST OF SCIENCE REHOVOTH (ISRAEL) DEPT OF APPLIED MATHEMATICS
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| Research activities within the framework of this contract are documented in twenty-six scientific papers, twenty-one of which were already published in various scientific Journals and the rest are in press. Other activities are the preparation of a comprehensive library of computer programs for various fields of endeavor in theoretical and experimental seismology and the establishment of a modern geophysical observatory near Eilat, Israel, which includes strainmeters, tiltmeters and high-gain displacement-meters. ... |
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| Deformation of a Homogeneous Earth Model by Finite Dislocations, |
1969 |
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| Authors:
Ari Ben-Menahem; Sarva Jit Singh; Faiza Solomon; WEIZMANN INST OF SCIENCE REHOVOTH (ISRAEL) DEPT OF APPLIED MATHEMATICS
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| The deformation of a homogeneous, non-gravitating, elastic sphere induced by a finite displacement dislocation placed inside the sphere is obtained in the form of rapidly converging series for arbitrary value of the Poisson ratio. Surface displacements, tilts, strains, and stresses are computed for strike-slip and dip-slip source models with various vertical extents. The numerical results are mapped on an epicentral tangential plane. Assuming a strike-slip fault of length 600 km ... |
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| Computation of the Divergence Coefficient for Seismic Phases, |
1969 |
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| Authors:
Michael Shimshoni; Ari Ben-Menahem; WEIZMANN INST OF SCIENCE REHOVOTH (ISRAEL) DEPT OF APPLIED MATHEMATICS
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| By using a cubic spline interpolation method a representation of seismological travel time tables is achieved which is highly continuous. Divergence coefficients for seismic phases computed from this representation are free from non-essential discontinuities and are thus more meaningful than those obtained using other methods of interpolation. Results are compared with those obtained by others. For six phases results are given in graphs and tables. (Author) |
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| Comments of Papers by Costain et Al and McCamy et Al on the Solution of Zoeppritz' Amplitude Equations, |
1965 |
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| Authors:
Sarva Jit Singh; Ari Ben-Menahem; Michael Shimshoni; WEIZMANN INST OF SCIENCE REHOVOTH (ISRAEL) DEPT OF APPLIED MATHEMATICS
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| The general equations for reflection and refraction of plane waves at a plane interface between two semi-infinite elastic solids were given by Zoeppritz (1919). The papers discusses these equations. (Author) |
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