Results 251 to 260 of about 180,931 (300)

Seismic energy determination from local and regional seismic events

2012
New Manual of Seismological Observatory Practice 2 (NMSOP2)
Choy, George L., Boatwright, John L.
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Portable seismic energy source

The Journal of the Acoustical Society of America, 1983
A portable seismic energy source having a base for resting on the earth's surface, a gun providing a means of firing a projectile to impact the earth and generate a seismic signal and a ball and socket to mount the gun on the base to permit the projectile fired by the gun to strike the surface of the earth at a selectable angle.
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Comparison of seismic energy sources

Proceedings, 1996
Knowledge about the power and other characteristic parameters of a seismic source is of general interest. Especially for shallow reflection seismic surveys many alternate sources are published and already in use. Common shallow reflection seismic energy sources are e.g. the sledge hammer, the Buffalo Gun and small amounts of explosives.
R. K. Fruhwirth, R. Schmöller
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Modeling injection-induced seismicity through calculation of radiated seismic energy

Journal of Natural Gas Science and Engineering, 2018
Abstract Seismicity induced by the injection of fluid into the fractured ground is one of the most challenging issues facing geothermal and deep wastewater disposal industries. This paper introduces an energy-based numerical methodology to study roles of fluid injection in triggering rupture (seismic slip) along preexisting faults. The methodology is
Zoheir Khademian, Masami Nakagawa, Ugur Ozbay   +2 more
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Effect of Seismic Characteristics on Seismic Energy Response of Bridge

Advanced Materials Research, 2011
The energy equations of MDOF bridges are established based on the energy equilibrium theory. With considering the seismic characteristics, the FEA model of one double-column pier of passenger dedicated line is established in order to research the seismic energy response and its distribution rules when MDOF bridges entry the nonlinear state.
Yu Li, Hua Bai, Tao Wang
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Seismic energy releases from volcanoes

Bulletin of Volcanology, 1988
Seismic energy release during the precursory, eruptive and declining stages of volcanic activities provides various information about the mechanisms of volcanic eruptions and the temporary developments of their activities. Hitherto the energy release patterns from precursory earthquake swarms were used to predict the eruption times, especially of ...
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Evaluation of seismic energy in structures

Earthquake Engineering & Structural Dynamics, 1990
AbstractResearch engineers use two types of energy equations to study single‐degree‐of‐freedom (SDOF) systems subject to earthquake induced ground motions. The first method uses an absolute energy formulation; the second method uses a relative energy formulation.
Chia‐Ming Uang, Vitelmo V. Bertero
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Evaluation of seismic energy demand

Earthquake Engineering & Structural Dynamics, 2001
AbstractIn this paper, a method is proposed in order to obtain a simplified representation of hysteretic and input energy spectra. The method is based on the evaluation of the equivalent number of cycles correlated to the earthquake characteristics by the proposed seismic index ID.
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Constituent Energy of Regional Seismic Coda

Bulletin of the Seismological Society of America, 2008
Seismic coda is composed of scattered wavelets originated from various heterogeneities. The phase composition of regional seismic coda still remains unknown, despite its use for several decades. This is caused partly because the ray paths of scattered wavelets in coda are not on the great-circle path between a source and receiver.
T.-K. Hong, W. Menke
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Energy Partitioning of Seismic Waves

2011
When an incoming P wave strikes an interface between two isotropic homogeneous elastic media at some angle other than the vertical, some of the energy is converted into S wave which gets reflected and transmitted in the same way as the P wave. This is known as the energy partitioning of seismic wave.
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