... Lepanto, AR 35.614N 90.413W Site E Memphis, TN 35.136N 89.846Wto bedrock at this site is 750 m. DEEP SHEARWAVEVELOCITY PROFILES FROM SURFACEWAVE MEASUREMENTS, MS EMBAYMENT 795SITE D: LEPANTO,ARKANSAS Site D is located west of Route 140 in Lepanto, Arkansas. This site is near the loca- tion of a seismic...

.... These origin times could then be used as constraints with which to use body waves and surface waves to locate the epicenters. The initial results of relocating natural seismic events are promising. The magnitudes of the epicenter shifts and origin time corrections determined for these events are reason- able...

... to revolutionize onshore seismic acquisition : 80th Conference and Exhibition, EAGE, Extended Abstracts , https://doi.org/10.3997/2214-4609.201801402 . Papadopoulou , M. , 2021 , Surfacewave methods for mineral exploration : PhD thesis, Politecnico di Torino. Papadopoulou , M. , F. Da Col...

... A. M. Bloch S. Landisman M. (1969) . A technique for the analysis of transient seismic signals , Bull. Seism. Soc. Am. 59 , 427 - 444...

... or seismicity, rather than subaxial mantle them drop through the ocean to the seafloor. We use the structure beneath the ridge. Nevertheless, we stress the im- Rayleigh waves and Love waves to determine the rotation portance of appropriately designing future arrays so that suf- angles for the two working off...

...Praveen K. Malhotra, M.EERI Seismic ground motions excite long-period sloshing response in liquid-storage tanks. A minimum freeboard is needed to prevent the sloshing waves from impacting the roof of tanks. Since freeboard results in unused storage capacity, many tanks are not provided...

... inferred from the body waves closely matched those determined from the surface waves. Further, we were able to determine the seismic moments for the tectonic release by comparison with several shallow, strike-slip earthquakes. Although the SH waveforms provide the most direct measure of the tectonic...

...David F. Halliday; Taiwo Fawumi; Johan O. A. Robertsson; Ed Kragh ABSTRACT We investigated the use of seismic sensors as small seismic sources. A voltage signal is applied to a geophone that forces the mass within the geophone to move. The movement of the mass generates a seismic wavefield...

... areas of seismic activity in northern Iran. This region is dominated by the central Alborz Mountains belt and a large composite cone, the Damavand volcano. Located in the foothills of the Alborz Mountains, the city of Tehran, with a population of ∼15 million, is subject to high seismic risk ( Jackson...

... recorded. Anyone who has spent some time looking at seismic records, however, will recognize that most events in the sense defined above will turn out not to be earthquakes. The program must therefore be able to determine very quickly that a spurious event is not an earthquake and return to monitoring...

... forms from a seismic event which occurred reasonably close to the Alma Ata site. Measurements using the spectra or the cepstra appear to be most accurate in determining the delay time between the two events. The analysis methods discussed here generally give results which are in good agreement...

... surface-seismic methods complemented each other in the determination of Vs 30, Vs 40, and Vs -versus-depth structure. Using a multi-method approach when acquiring Vs data helps corroborate results, thus adding confidence that reliable site characterization information has been obtained. Importantly...

... propagation modes of the surface waves. A common approach to estimate the dispersion curves is to manually pick the magnitude maxima from the frequency-phase velocity spectra of the seismic data. This approach is inefficient, time consuming, highly subjective, and not feasible for large surveys. Automatic...

...Harsh K. Gupta; Kazuo Hamada abstract Group velocities for Rayleigh waves extending to 140-sec-period range have been determined for 10 paths in the Indonesia-Philippine region using moving window analysis. The group velocities for five of these paths have been determined from the vertical as well...

.... Soc. Am. , 29 : 427 - 462 (1939) . 3. Byerly P. The Seismic Waves from the Port Chicago Explosion , Bull. Seism. Soc. Am. 36 : 331 - 348 (1946) . 4. Bullen K. E...

... algorithms to focal mechanism determination , Geophys. Res. Lett. 21 , 729 - 732 . Marquardt D. W. (1963) . An algorithm for least squares estimation of nonlinear parameters , J. Soc. Indust. Appl. Math. 11 , 431 - 441...

...Eric P. Chael Abstract The desire to operate denser networks in order to monitor seismic activity at lower thresholds leads to greater emphasis on automated data processing. An algorithm for detecting and characterizing long-period Rayleigh-wave arrivals has been developed and tested. The routine...

... seismic anisotropy . Phys. Earth Planet. Inter. 158 , 264 – 280 . Babuska , V. , Montagner , J.P. , Plomerova , J. , Girardin , N. , 1998 . Age-dependent large-scale fabric of the mantle lithosphere as derived from surfacewave velocity...

... coefficient determination ( Xia et al., 2002a ). Though seismic refraction methods are widely used for shear wave velocity studies ( Palmer, 1980 ), they fail to estimate S-velocity where geological structure is complex ( Xia et al., 2002c ) or where a hidden layer (a layer whose velocity is less than its...

...). Small solid circles are aftershock locations of the earthquake determined by USGS. The solid star is the location of the mainshock. Seismicity 25 Figure 3-2. Source scaling relationship between rupture area and seismic moment (Mo). Management in Ahmedabad also sufferedminor to major shear cracks near...