...M.-P. Bouin; P. Bernard Abstract This article illustrates the use of near-source S -wave polarization analyses for constraining some rupture parameters of large earthquakes, in the particular case of the 1979 Imperial Valley mainshock. The ten SMA1 strong-motion records closest to the source have...

...GARY M. NORRIS Abstract The Meloland Overcrossing is located 0.3 mi from the Imperial fault and was shaken by ground surface motions of up to 0.3 g during the Imperial Valley earthquake of 1979 (magnitude M = 6.4). While there was no significant damage to this instrumented highway bridge or any...

...Hsui-Lin Liu; Donald V. Helmberger Abstract The well-recorded strong ground motion data for the 23:19 aftershock of the 15 October 1979 Imperial Valley earthquake provide a good opportunity to study the high-frequency source characteristics and the path effects at near-source distances. The best...

...Paul Spudich; Edward Cranswick Abstract The 1979 Imperial Valley, California, earthquake ( M s = 6.9) was recorded on the El Centro differential array, a 213-m-long linear array of 5 three-component digital accelerometers 5.6 km from the nearest tectonic surface rupture. Although absolute time...

...Martin A. Slade; Gregory A. Lyzenga; Arthur Raefsky Abstract Synthesis of geodetic and seismological results for the 1979 Imperial Valley earthquake is approached using three-dimensional finite element modeling techniques. The displacements and stresses are calculated elastically throughout...

...Stephen H. Hartzell; Thomas H. Heaton Abstract A least-squares point-by-point inversion of strong ground motion and teleseismic body waves is used to infer the fault rupture history of the 1979 Imperial Valley, California, earthquake. The Imperial fault is represented by a plane embedded in a half...

...Thomas H. Heaton; John G. Anderson; Peter T. German abstract We recognized a number of ground failures along the south bank of the New River north of Brawley, California, following the 15 October 1979 Imperial Valley, California, earthquake sequence. The zone includes a large pond and numerous sand...

...J. Langbein; A. McGarr; M. J. S. Johnston; P. W. Harsh abstract A geodetic trilateration network comprising 54 baselines was established around the northern part of the Imperial fault beginning 12 days after the Imperial Valley earthquake of 15 October 1979, and the line lengths were repeatedly...

... motion , Earthquake Eng. Struct. Dyn. 3 , 365 - 374 . Porcella R. Mattiesen R. (1979) Strong motion records, October 15, 1979 Imperial Valley earthquake , U.S. Geol...

...Ralph J. Archuleta abstract Gross features of the rupture mechanism of the 1979 Imperial Valley earthquake ( M L = 6.6) are inferred from qualitative analysis of near-source ground motion data and observed surface rupture. A lower bound on the event's seismic moment of 2.5 × 10 25 dyne-cm...

...Mansour Niazi abstract Two sets of observations obtained during the 15 October 1979 Imperial Valley earthquake, M S 6.9, are presented. The data suggest different dynamic characteristics of the source when viewed in different frequency bands. The first data set consists of the observed residuals...

... in the data is quantitatively stated. The inversion methodology is applied to 77 components of near-field ground acceleration recorded during the 15 October 1979 Imperial Valley earthquake. The faulting is constrained to propagate bilaterally away from the epicenter at an average velocity of 90 per cent...

...Stephen Hartzell; Donald V. Helmberger Abstract Twelve three-component strong-motion displacement records are modeled for the 1979 Imperial Valley earthquake to recover the distribution of slip on the Imperial fault plane. The final model, for which point source responses are calculated...

... B. G. Stover C. W. Hopper M. G. Barnhard L. M. (1979) . The Imperial Valley, California, earthquake of October 15, 1979...

...Stewart W. Smith; John E. Ehrenberg; E. Norman Hernandez abstract Two methods of analysis have been applied to the El Centro differential array data from the 1979 Imperial Valley earthquake. Spectral ratios of array averages were developed as one way of estimating the spatial averaging of ground...

.... Porcella R. L. (1981) . Peak horizontal ground motions from the 1979 Imperial Valley earthquake: comparison with data from previous earthquakes , in The Imperial Valley, California Earthquake of October 15, 1979 , U.S. Geol. Surv. Profess. Paper (in press...