Estructura del subsuelo de la Sabana de Bogotá. Análisis de dispersión de ondas superficiales a partir de sismos y ruido sísmicos
We present the results of the analysis of vertical component from earthquake and seismic noise records obtained in the Sabana de Bogotá to determine subsoil structure in that region. Rayleigh waves present in the earthquake data were processed to estimate to estimate group velocities. In the case of...
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| Format: | Article |
| Language: | English |
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Universidad Nacional Autónoma de México, Instituto de Geofísica
2023-01-01
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| Series: | Geofísica Internacional |
| Subjects: | |
| Online Access: | http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1449/1570 |
| _version_ | 1797845223409188864 |
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| author | Francisco J. Chávez-García Hugo Monsalve-Jaramillo Joaquín Vila-Ortega |
| author_facet | Francisco J. Chávez-García Hugo Monsalve-Jaramillo Joaquín Vila-Ortega |
| author_sort | Francisco J. Chávez-García |
| collection | DOAJ |
| description | We present the results of the analysis of vertical component from earthquake and seismic noise records obtained in the Sabana de Bogotá to determine subsoil structure in that region. Rayleigh waves present in the earthquake data were processed to estimate to estimate group velocities. In the case of seismic noise, we used seismic interferometry to estimate Green’s functions between stations from average cross-correlation. Rayleigh wave pulses were recovered between stations from seismic noise. We processed the results to estimate group velocities in all cases. The results show the impact of geology on group velocities in the studied region. Different station pairs show varying group velocities depending on the age of the rocks along the paths. Our estimated impedance contrast between surficial deposits and underlying bedrock suggest possible amplification of ground motion larger than a factor of 10. The poor quality and the limited quantity of our data limited the comprehensiveness of our results. The frequency ranges of the results showed poor overlap, hindering comparisons among paths. In spite of their limitations, our results highlight the importance of site effects in the Sabana de Bogotá and the need to take them into account to estimate ground motion for future events in that region. |
| first_indexed | 2024-04-09T17:36:42Z |
| format | Article |
| id | doaj.art-cd1c9885ae414f4aa7167363b5d7d908 |
| institution | Directory Open Access Journal |
| issn | 2954-436X |
| language | English |
| last_indexed | 2024-04-09T17:36:42Z |
| publishDate | 2023-01-01 |
| publisher | Universidad Nacional Autónoma de México, Instituto de Geofísica |
| record_format | Article |
| series | Geofísica Internacional |
| spelling | doaj.art-cd1c9885ae414f4aa7167363b5d7d9082023-04-17T23:15:27ZengUniversidad Nacional Autónoma de México, Instituto de GeofísicaGeofísica Internacional2954-436X2023-01-0162141942910.22201/igeof.2954436xe.2023.62.1.1449Estructura del subsuelo de la Sabana de Bogotá. Análisis de dispersión de ondas superficiales a partir de sismos y ruido sísmicosFrancisco J. Chávez-García0https://orcid.org/0000-0002-5490-9792Hugo Monsalve-Jaramillo1https://orcid.org/0000-0003-0159-1116Joaquín Vila-Ortega2https://orcid.org/0000-0001-9358-4903Universidad Nacional Autónoma de México, Instituto de Ingeniería, Coordinación de Ingeniería Sismológica, Ciudad Universitaria, Coyoacán 04510 CDMX, MéxicoUniversidad del Quindío, Centro de Estudios e Investigaciones de la Facultad de IngenieríaUniversidad del Quindío, Centro de Estudios e Investigaciones de la Facultad de IngenieríaWe present the results of the analysis of vertical component from earthquake and seismic noise records obtained in the Sabana de Bogotá to determine subsoil structure in that region. Rayleigh waves present in the earthquake data were processed to estimate to estimate group velocities. In the case of seismic noise, we used seismic interferometry to estimate Green’s functions between stations from average cross-correlation. Rayleigh wave pulses were recovered between stations from seismic noise. We processed the results to estimate group velocities in all cases. The results show the impact of geology on group velocities in the studied region. Different station pairs show varying group velocities depending on the age of the rocks along the paths. Our estimated impedance contrast between surficial deposits and underlying bedrock suggest possible amplification of ground motion larger than a factor of 10. The poor quality and the limited quantity of our data limited the comprehensiveness of our results. The frequency ranges of the results showed poor overlap, hindering comparisons among paths. In spite of their limitations, our results highlight the importance of site effects in the Sabana de Bogotá and the need to take them into account to estimate ground motion for future events in that region.http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1449/1570correlación cruzadaondas de rayleighdispersión de velocidad de grupoefectos de sitio |
| spellingShingle | Francisco J. Chávez-García Hugo Monsalve-Jaramillo Joaquín Vila-Ortega Estructura del subsuelo de la Sabana de Bogotá. Análisis de dispersión de ondas superficiales a partir de sismos y ruido sísmicos Geofísica Internacional correlación cruzada ondas de rayleigh dispersión de velocidad de grupo efectos de sitio |
| title | Estructura del subsuelo de la Sabana de Bogotá. Análisis de dispersión de ondas superficiales a partir de sismos y ruido sísmicos |
| title_full | Estructura del subsuelo de la Sabana de Bogotá. Análisis de dispersión de ondas superficiales a partir de sismos y ruido sísmicos |
| title_fullStr | Estructura del subsuelo de la Sabana de Bogotá. Análisis de dispersión de ondas superficiales a partir de sismos y ruido sísmicos |
| title_full_unstemmed | Estructura del subsuelo de la Sabana de Bogotá. Análisis de dispersión de ondas superficiales a partir de sismos y ruido sísmicos |
| title_short | Estructura del subsuelo de la Sabana de Bogotá. Análisis de dispersión de ondas superficiales a partir de sismos y ruido sísmicos |
| title_sort | estructura del subsuelo de la sabana de bogota analisis de dispersion de ondas superficiales a partir de sismos y ruido sismicos |
| topic | correlación cruzada ondas de rayleigh dispersión de velocidad de grupo efectos de sitio |
| url | http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1449/1570 |
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