Topic
Microseism
About: Microseism is a research topic. Over the lifetime, 2044 publications have been published within this topic receiving 41756 citations.
Papers published on a yearly basis
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Papers
Book•
1 Jan 1995
TL;DR: A review of the history of global seismology can be found in this article, where the authors present a survey of the current state of the art in the field of Seismology.
Abstract: Introduction: Historical Development of Global Seismology. The Topics of Global Seismology. Elasticity: Strain. Stress. Equation of Motion. Wave Equations: and S Waves. Body Waves and Ray Theory:The Eikonal Equation and Ray Geometry. Travel Times in a Layered Earth. Travel-Time Curves in a Continuous Media. Travel Times in a Spherical Earth. Wave Amplitude, Energy, and Geometric Spreading. Partitioning of Seismic Energy at a Boundary. Attenuation and Scattering. Surface Waves and Free Oscillations: Free-Surface Interactions. Rayleigh Waves. Love Waves. Dispersion. Tsunamis. Free Oscillations. Attenuation of Surface Waves and Free Oscillations. Seismometry: Inertial Pendulum Systems.Earth Noise. Electromagnetic Instruments and Early Global Networks. Force-Feedback Instruments and Digital Global Networks. Seismic Arrays and Regional Networks. Seismogram Interpretation: Nomenclature. Travel-Time Curves. Locating Earthquakes. Generalized Inverse. Determination of Earth Structure: Earth Structure Inversions. Earth Structure. Seismic Sources: Faulting Sources. Equivalent Body Forces. Elastostatics. Elastodynamics. The Seismic Moment Tensor. Determination of Faulting Orientation. Earthquake Kinematics and Dynamics: The 1-D Haskell Source. The Source Spectrum. Stress Drop, Particle Velocity, and Rupture Velocity. Magnitude Scales. Seismic Energy and Magnitude. Aftershocks and Fault Area. Scaling and Earthquake Self-Similarity. Earthquake Statistics. Seismic Waveform Modeling: Body Waveform Modeling: The Finite Fault. Surface-Wave Modeling for the Seismic Source. The Source Time Function and Fault Slip. Complex Earthquakes. Very Broadband Seismic Source Models.Seismotectonics: Divergent Boundaries. Transcurrent Boundaries. Convergent Boundaries. Intraplate Earthquakes. The Earthquake Cycle. Earthquake Prediction. Subject Index.
1,566 citations
TL;DR: In this paper, the authors demonstrate that coherent information about the Earth structure can be extracted from the ambient seismic noise using a cross-correlations of vertical component records of several days of seismic noise at different pairs of stations separated by distances from about one hundred to more than two thousand kilometers.
Abstract: [1] We demonstrate that the coherent information about the Earth structure can be extracted from the ambient seismic noise We compute cross-correlations of vertical component records of several days of seismic noise at different pairs of stations separated by distances from about one hundred to more than two thousand kilometers Coherent broadband dispersive wavetrains clearly emerge with group velocities similar to those predicted from the global Rayleigh-wave tomographic maps that have been constrained using ballistic surface waves Those results show that coherent Rayleigh waves can be extracted from the ambient seismic noise and that their dispersion characteristics can be measured in a broad range of periods This provides a source for new types of surface-wave measurements that can be obtained for numerous paths that could not be sampled with the ballistic waves and, therefore, can significantly improve the resolution of seismic images
1,539 citations
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TL;DR: In most circumstances, the properties of rogue waves and their probability of occurrence appear to be consistent with second-order random-wave theory as mentioned in this paper, although it is unclear whether these represent measurement errors or statistical flukes, or are caused by physical mechanisms not covered by the model.
Abstract: Oceanic rogue waves are surface gravity waves whose wave heights are much larger than expected for the sea state. The common operational definition requires them to be at least twice as large as the significant wave height. In most circumstances, the properties of rogue waves and their probability of occurrence appear to be consistent with second-order random-wave theory. There are exceptions, although it is unclear whether these represent measurement errors or statistical flukes, or are caused by physical mechanisms not covered by the model. A clear deviation from second-order theory occurs in numerical simulations and wave-tank experiments, in which a higher frequency of occurrence of rogue waves is found in long-crested waves owing to a nonlinear instability.
971 citations
1 Jan 1972
725 citations
TL;DR: In this article, an alternative approach based on spectral transfer functions and the local energy-balance equation of the seismic field is proposed, which enables a rigorous analysis of the statistical aspects of the problem, which could be treated only approximately and under restrictive conditions in terms of the far-field representations used previously.
Abstract: Theories of the origin of microseisms have in the past generally been expressed in terms of the Green functions of the elastic systems considered. An alternative approach based on spectral transfer functions and the local energy-balance equation of the seismic field is proposed. The method enables a rigorous analysis of the statistical aspects of the problem, which could be treated only approximately and under restrictive conditions in terms of the far-field representations used previously. Three suggested origins of microseisms are considered: (1) the action of ocean waves on coasts, originally proposed by Wiechert; (2) atmospheric pressure fluctuations, as suggested by Gherzi, Scholte, and others; and (3) nonlinear interactions between ocean waves as proposed by Longuet-Higgins. In all cases appreciable microseisms are generated only by Fourier components of the random exciting fields that have the same phase velocities as free modes of the elastic system. The effect of pressure fluctuations associated with turbulence in the atmosphere is found to be negligible. The theory for Wiechert's and Longuet-Higgins' mechanisms is in good agreement with recent measurements by Haubrich et al.
673 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2025 | 157 |
| 2024 | 221 |
| 2023 | 368 |
| 2022 | 507 |
| 2021 | 75 |
| 2020 | 94 |