- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
NARROW
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Caribbean region
-
West Indies
-
Antilles
-
Greater Antilles
-
Cuba (1)
-
-
-
-
-
Europe
-
Alps (1)
-
Southern Europe
-
Italy
-
Apennines (1)
-
Molise Italy (2)
-
Po Valley (1)
-
Sicily Italy
-
Catania Italy (1)
-
-
Tagliamento Valley (1)
-
Venetia (1)
-
-
-
-
-
Primary terms
-
Caribbean region
-
West Indies
-
Antilles
-
Greater Antilles
-
Cuba (1)
-
-
-
-
-
catalogs (1)
-
data processing (2)
-
earthquakes (8)
-
Europe
-
Alps (1)
-
Southern Europe
-
Italy
-
Apennines (1)
-
Molise Italy (2)
-
Po Valley (1)
-
Sicily Italy
-
Catania Italy (1)
-
-
Tagliamento Valley (1)
-
Venetia (1)
-
-
-
-
geophysical methods (1)
-
soil mechanics (1)
-
Evaluation of the Event Detection Level of the Cuban Seismic Network
Site Amplification at Permanent Stations in Northeastern Italy
Microseismic Portrait of the Montello Thrust (Southeastern Alps, Italy) from a Dense High‐Quality Seismic Network
GITANES: A MATLAB Package for Estimation of Site Spectral Amplification with the Generalized Inversion Technique
Misalignment Angle Correction of Borehole Seismic Sensors: The Case Study of the Collalto Seismic Network
Analysis of Site Response and Building Damage Distribution Induced by the 31 October 2002 Earthquake at San Giuliano di Puglia (Italy)
Abstract Few problems in elastodynamics have a closed-form analytical solution. The others can be investigated with semianalytical methods, but in general one is not sure whether these methods give reliable solutions. The same happens with numerical techniques: for instance, finite difference methods solve, in principle, any complex problem, including those with arbitrary inhomogeneities and boundary conditions. However, there is no way to verify the quantitative correctness of the solutions. The major problems are stability with respect to material properties, numerical dispersion, and the treatment of boundary conditions. In practice, these problems may produce inaccurate solutions. In this paper, the study of complex problems with two different numerical grid techniques in order to cross-check the solutions is proposed. Interface waves, in particular, are emphasized, since they pose the major difficulties due to the need to implement boundary conditions. The first method is based on global differential operators where the solution is expanded in terms of the Fourier basis and Chebyshev polynomials, while the second is the spectral element method, an extension of the finite element method that uses Chebyshev polynomials as interpolating functions. Both methods have spectral accuracy up to approximately the Nyquist wave number of the grid. Moreover, both methods implement the boundary conditions in a natural way, particularly the spectra element algorithm. We first solve Lamb’s problem and compare numerical and analytical solutions; then, the problem of dispersed Rayleigh waves, and finally, the two-quarter space problem. We show that the modeling algorithms correctly reproduce the analytical solutions and yield a perfect matching when these solutions do not exist. The combined modeling techniques provide a powerful tool for solving complex problems in elastodynamics.
Abstract In this paper, we present a spectral element method for studying acoustic wave propagation in complex geological structures. Due to complexity (both lithological and stratigraphical), the use of numerical methods of higher accuracy and flexibility is needed to achieve the correct results. The spectral element method shows more accurate results compared to the low-order finite element, the conventional finite difference and the pseudospectral methods. High accuracy is reached even for rather long wave propagation times and dispersion errors are essentially eliminated; pirregular interfaces between different media can be well described so that numerical artifacts or noises are not at all introduced. The method is tested against analytical solutions both in the two-dimensional homogeneous and heterogeneous media. The results of different simulations are presented.