Seismic wave propagation and pressure measurements near explosions. by George R. Pickett

Cover of: Seismic wave propagation and pressure measurements near explosions. | George R. Pickett

Published by Colorado School of Mines in Golden, Col .

Written in English

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SeriesQuarterly of the Colorado School of Mines -- vol.50, no.4, Quarterly (Colorado School of Mines) -- vol.50, no.4.
ContributionsColorado School of Mines.
ID Numbers
Open LibraryOL13956113M

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Seismic wave propagation and pressure measurements near explosions. Golden, Colorado School of Mines, (OCoLC) Online version: Pickett, G.R.

(George Richard). Seismic wave propagation and pressure measurements near explosions. Golden, Colorado School of Mines, (OCoLC) Document Type: Book: All Authors / Contributors. The title is "wave propagation", but the book is all about ray, which is a high frequency approximation of waves.

Most of the topics in the book are irrelevant to any thing that can be used by a practitioner Cited by: A wave-theoretical interpretation is given of pressure waves generated in shallow water by explosions of charges of T.N.T. ranging from to lbs., and recorded by Ewing and Worzel.

Outdoor sound propagation Ground vibration Seismic wave propagation Building damage criteria. abstract. Measurements of seismic signatures produced by airborne, near-surface detonations of explosive charges over a variety of ground types show two distinct ground vibration arrivals.

In all cases, the earlier arrival. Ground vibrations produced by surface and near-surface explosions Article in Applied Acoustics 74(11)– November with Reads How we measure 'reads'.

The team incorporated SW4’s solid-earth seismic wave propagation method into ElAc, giving the new code all the features needed for realistic seismic wave simulations.

(left) Conventional codes used for seismic modeling, such as Livermore’s SW4, treat the atmosphere as a vacuum when simulating seismic waves from below-surface energetic events. seismic wave propagation in acoustic, elastic and anisotropic media is developed to al-low seismic waves to be modelled in complex, realistic three-dimensional Earth mod-els.

This book provides a consistent and thorough development of modelling methods widely used in elastic wave propagation ranging from the whole Earth, through re.

sensor, V is the seismic wave propagation velocity, and t is the time of seismic wave propagation from the source of excitation to the sensor. The method developed for the measurement of the seismic wave propagation velocity at the actual terrain consists of the following: • On the terrain for which we want to calculate the seismic wave propagation velocity,File Size: KB.

Seismic Wave Propagation in Stratified Media B.L.N. Kennett Title Page Contents JJ II J I Page 2 of Back Full Screen Close Quit RS S E ANU Contents Preface page 8 1 Introduction 12 Seismic signals 13 Seismogram analysis 20 Seismic waves 22 The effect of prestress 22 Material anisotropy 24 Attenuation 26 File Size: 5MB.

that was first introduced for seismic wave propagation prob-lems by [5]. The key idea is to map each of the six sides of a cube to the surface of the sphere. An increase in element size, to adapt it to the variations of wave speed with depth, can be obtained by first doubling the mesh in one lateral di.

In studying the physical processes involved in the generation of seismic waves by explosions, L. ()Wave Propagation near Explosive SourcesPL-TR–, Phillips Sammis C.G. () Effects of Rock Damage on Seismic Waves Generated by Explosions. In: Ekström G., Denny M., Murphy J.R. (eds) Monitoring the Comprehensive Nuclear Cited by: Experimental measurements of the acoustic and seismic signatures produced by near-surface explosions were conducted at seven different locations having a variety of ground and vegetative conditions for propagation distances from 8 to by: P-waves are compressional waves in which particle motion is in the direction of the wave propagation.

The compression and extension of the medium, and the propagation of the wave, can be seen in the diagram on the right [1]. Seismic waves can be generated by a sudden release of energy such as an earthquake, volcanic eruption, or chemical explosion.

There are several types of seismic waves, often classified as body waves, which propagate through the volume of the Earth, and surface waves, which travel along the surface of the : Xianyun Wu, Ru-Shan Wu.

Numerical Modeling of Seismic Wave Propagation (Geophysics Reprints Series, No 13) (Geophysics Reprint Series) [Kelly, Kevin R., Marfurt, K. J.] on *FREE* shipping on qualifying offers. Numerical Modeling of Seismic Wave Propagation (Geophysics Reprints Series, No Author: Kevin R.

Kelly. Introduction [2] Earth structure can be inferred from seismic wave propagation resulting from numerous kinds of sources such as earthquakes, explosions, forced vibrations (Vibroseis), and ground impact. Our purpose in this report is to show that there is a very common atmospheric source, infrasound from thunder, which can be recorded acoustically and seismically and can be used to infer the Cited by: 9.

The seismic wave may be generated by an explosion, a dropped weight, a mechanical vibrator, a bubble of high-pressure air injected into water, or other sources.

The seismic wave is detected by a Geophone on land or by a hydrophone in water. Since each of these parts depends on the other, it should be noted that they are carried out as an iterative process to minimize the differences between models and field measurements.

Adjustment of seismic signals due to geometric attenuation. The energy of seismic waves in 3D can be seen as distributed along the wavefront by: The 9C vertical seismic profile is capable of generating P-wave mode and the fundamental S-wave mode (SH-SH and SV-SV) directly at the source station and permits the basic components of elastic Author: Niranjan Nanda.

The obtained wave propagation properties, such as wave travel time and wave amplitude ratio, at each story of the building are found to reflect the structural properties like rigidity and damping ratio at that story.

Further, a new method for wave-propagation analysis—called evolutionary normalized input-output minimization—is : H.

Kawakami, M. Oyunchimeg, E. Tingatinga. A near‐surface chemical explosion excites an atmospheric pressure disturbance, which propagates as blast waves in the atmosphere.

Explosion forensics utilizes waveform characteristics of the blast waves (e.g., peak overpressure, impulse per unit area, and/or duration) to estimate the explosion Cited by: Attenuation is frequency-dependent and is strongly affected by scattering.

Scattering is an important factor caused by the heterogeneity of the Earth's crust and mantle and availability of hydrocarbon reservoirs. Scattering theory states that rocks containing oil and gas can cause energy attenuation in seismic waves. ected waves and refracted/head waves are discussed.

Introduction The seismic method makes use of the properties of the velocity of sound. This velocity is di erent for di erent rocks and it is this di erence which is exploited in the seismic method. When we create sound at or near the surface of the earth, some energy will be re ected back File Size: KB.

An Introduction to Seismology, Earthquakes and Earth Structures is an introduction to seismology and its role in the earth sciences, and is written for advanced undergraduate and beginning graduate students.

The fundamentals of seismic wave propagation are developed using a physical approach and then applied to show how refraction, reflection, and teleseismic techniques are used to 4/5(1). Simulation of topographic effects on seismic waves from shallow explosions near the North Korean nuclear test site with emphasis on shear wave generation Arthur J.

Rodgers,1,2 N. Anders Petersson,3 and Bjorn Sjogreen3 Received 17 May ; revised 2 August ; accepted 20 August ; published 10 November Cited by: C.

Effects of Explosions. An explosion is a gas dynamic phenomenon there are a variety of effects of the spherically expanding heat and pressure wave. These effects assist the investigator in understanding the dynamics of the explosion and the sequence of events that took place during the explosion.

Blast Pressure Front Effect. This wave behaviour can also be used on a smaller scale by recording waves generated by explosions or ground vibrators in the search for oil and gas. Types of seismic waves. There are three basic types of seismic waves – P-waves, S-waves and surface waves.

P-waves and S-waves are sometimes collectively called body waves. P-waves. Wave Propagation in Dispersive Media. 1 Superposition of two plane harmonic waves in a non-dispersive artificial explosions and analogous sources, and pr~pagate along the Earth's surface, are referred to as seismic surface waves.

transverse seismic waves propagating through the Earth). The division of the Earth into the. Wave propagation is any of the ways in which waves travel. With respect to the direction of the oscillation relative to the propagation direction, we can distinguish between longitudinal wave and transverse waves.

For electromagnetic waves, propagation may occur in a vacuum as well as in a material medium. P and S wave propagation through Earths interior. Simulation of Global Seismic Wave Propagation Through Non-Conforming Curved Finite Element Methods - Duration: Ángel Rodríguez-Rozas 1, S waves, also called shear or transverse waves, cause points of solid media to move back and forth perpendicular to the direction of propagation; as the wave passes, the medium is sheared first in one direction and then in the Earth the speed of S waves increases from about km ( miles) per second at the surface to km ( miles) per second near the boundary of the core.

water pressure of 5 are given for propagation directions parallel (vertical) and normal (horizontal) to the borehole axis. In most cases, the foliation is horizontal. Perhaps the most interesting aspect of the velocity measurements is the small influence of confining pressure on seismic wave velocities.

A wave is a representation of the propagation of energy. In the case of seismic waves, energy is propagated through small displacements of the earth away from equilibrium. Energy propagates away from seismic source with a distinct pattern. Most seismic sources can.

The use of building vibrations to measure blast wave propagation in a city is examined in this case study. The Exxon Mobil Corp. oil refinery in Torrance, California experienced an explosion on Febru causing ground shaking equivalent to a magnitude earthquake.

The impulse response for the source was computed from Southern California Seismic Network data for a multi-orthogonal Author: A. Massari, M. Kohler, T. Heaton, H. Kanamori, E. Hauksson, R. Clayton, R. Guy, J. Bunn, M. Seismic Wave Propagation in Stratified Media Book Description: The theoretical development is physically based and is closely tied to the nature of the seismograms observed across a wide range of distance scales - from a few kilometres as in shallow reflection work for geophysical prospecting, to many thousands of kilometres for major earthquakes.

@article{osti_, title = {Seismic wave propagation modeling}, author = {Jones, E M and Olsen, K B}, abstractNote = {This is the final report of a one-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL).

A hybrid, finite-difference technique was developed for modeling nonlinear soil amplification from three-dimensional, finite.

The second type, or waves S, consists of wave propagation of shear, where the particles move in a direction perpendicular to the direction of propagation of the disturbance (Figure B).

These two types of waves can propagate through the interior of the Earth and we will refer to them as waves. Author: Lili Feng Simulation code: SW4 (by Petersson and Sjogreen) Input Earth model: ak with anomaly disks Visualization tool: Paraview Dark green: Low.

This seismic wavelet is small compared with the wavelength of a pressure wave in water (~75 m for a 20 Hz wave). This change in relation between P and V is also seen when close to a small variable volume source in bulk media, that is, within the “near field” of a “simple source” [ 21 ].Cited by: 7.

Two-dimensional array measurements of near-source accelerations have been conducted 6 km from the M L explosion Colwick at Pahute Mesa, Nevada Test Site. The three-component, nine-station array measured m across with interstation spacing of by:. Abstract.

The capability of calculating the close-in effects of the shock wave from an underground nuclear explosion has been demonstrated.

Agreement was obtained between calculation and measurements using a spherically symmetric, hydrodynamic, elastic-plastic code called SCC for the Hardhat event, a 5-kiloton nuclear detonation in granite.Fundamentals of Seismic Wave Propagation presents a comprehensive introduction to the propagation of high-frequency, body-waves in elastodynamics.

The theory of seismic wave propagation in acoustic, elastic and anisotropic media is developed to allow seismic waves to be modelled in complex, realistic three-dimensional Earth models.A seismograph is an instrument that measures and records elastic ground vibrations called seismic waves that are generated by earthquakes and man-made explosions.

By recording the arrival of seismic waves at remote seismograph stations, seismologists deduce information about the initial earthquake fault rupture or explosion, and about the.

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