Identification and localization of unknown seismic signals via reverse time migration within the Costa Rica Rift
The study was conducted in the Panama Basin, a zone with a complex system of mid-ocean ridges (MORs), explaining its intriguing thermal and seismic qualities and thereby making it an integral place for research. Similarly, the Panama Basin is a bathymetrically restricted oceanic basin situated in th...
- Autores:
-
Londoño Vargas, Juan Pablo
- Tipo de recurso:
- Trabajo de grado de pregrado
- Fecha de publicación:
- 2023
- Institución:
- Universidad de los Andes
- Repositorio:
- Séneca: repositorio Uniandes
- Idioma:
- eng
- OAI Identifier:
- oai:repositorio.uniandes.edu.co:1992/64012
- Acceso en línea:
- http://hdl.handle.net/1992/64012
- Palabra clave:
- Costa Rica Rift
Slow-slip earthquake
Non-volcanic tremor
Reverse time migration
Geociencias
- Rights
- openAccess
- License
- Atribución-NoComercial 4.0 Internacional
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oai:repositorio.uniandes.edu.co:1992/64012 |
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Séneca: repositorio Uniandes |
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|
dc.title.none.fl_str_mv |
Identification and localization of unknown seismic signals via reverse time migration within the Costa Rica Rift |
title |
Identification and localization of unknown seismic signals via reverse time migration within the Costa Rica Rift |
spellingShingle |
Identification and localization of unknown seismic signals via reverse time migration within the Costa Rica Rift Costa Rica Rift Slow-slip earthquake Non-volcanic tremor Reverse time migration Geociencias |
title_short |
Identification and localization of unknown seismic signals via reverse time migration within the Costa Rica Rift |
title_full |
Identification and localization of unknown seismic signals via reverse time migration within the Costa Rica Rift |
title_fullStr |
Identification and localization of unknown seismic signals via reverse time migration within the Costa Rica Rift |
title_full_unstemmed |
Identification and localization of unknown seismic signals via reverse time migration within the Costa Rica Rift |
title_sort |
Identification and localization of unknown seismic signals via reverse time migration within the Costa Rica Rift |
dc.creator.fl_str_mv |
Londoño Vargas, Juan Pablo |
dc.contributor.advisor.none.fl_str_mv |
Tary, Jean Baptiste |
dc.contributor.author.none.fl_str_mv |
Londoño Vargas, Juan Pablo |
dc.contributor.jury.none.fl_str_mv |
Poveda Núñez, Hugo Esteban |
dc.subject.keyword.none.fl_str_mv |
Costa Rica Rift Slow-slip earthquake Non-volcanic tremor Reverse time migration |
topic |
Costa Rica Rift Slow-slip earthquake Non-volcanic tremor Reverse time migration Geociencias |
dc.subject.themes.es_CO.fl_str_mv |
Geociencias |
description |
The study was conducted in the Panama Basin, a zone with a complex system of mid-ocean ridges (MORs), explaining its intriguing thermal and seismic qualities and thereby making it an integral place for research. Similarly, the Panama Basin is a bathymetrically restricted oceanic basin situated in the Eastern Pacific near the subduction zone of Central and South America. A network of ocean bottom seismometers (OBS) was deployed in one of the mid ocean ridges, the Costa Rica Rift, and operated for 23 days from January 26 to February 16, 2015. Previous studies have used this data and discovered several microearthquakes following compelling spatiotemporal trends. Regardless, non-volcanic tremor indagation has remained quiet on this site. Non-volcanic tremors are the most familiar seismic waves detected during slow-slip events. They are weak continuous vibrations with no clear impulsive phases. We processed all available data from this network to investigate if non-volcanic tremors are occurring within the zone. To tackle the task, we developed a pipeline that consisted of generating seismograms, filtering them, extracting the event, and finally locating the events. We used the reverse time migration (RTM) technique to map the events since it detects and locates events with a low signal-to-noise ratio (SNR) with no need for phase identification or picking. We identified and mapped 226 possible tremor events in the vicinity of the Costa Rica Rift. They were compactly clustered around the southwest of the network, did not show temporal clusterization, and predominantly occurred on a day-by-day basis along the survey. The results are relevant since no non-volcanic tremor was reported either in that zone or in that tectonic setting (divergent margin). However, limited station availability in the last weeks and an incomplete location method could introduce biases in the results. |
publishDate |
2023 |
dc.date.accessioned.none.fl_str_mv |
2023-01-19T19:55:41Z |
dc.date.available.none.fl_str_mv |
2023-01-19T19:55:41Z |
dc.date.issued.none.fl_str_mv |
2023-01-18 |
dc.type.es_CO.fl_str_mv |
Trabajo de grado - Pregrado |
dc.type.driver.none.fl_str_mv |
info:eu-repo/semantics/bachelorThesis |
dc.type.version.none.fl_str_mv |
info:eu-repo/semantics/acceptedVersion |
dc.type.coar.none.fl_str_mv |
http://purl.org/coar/resource_type/c_7a1f |
dc.type.content.es_CO.fl_str_mv |
Text |
dc.type.redcol.none.fl_str_mv |
http://purl.org/redcol/resource_type/TP |
format |
http://purl.org/coar/resource_type/c_7a1f |
status_str |
acceptedVersion |
dc.identifier.uri.none.fl_str_mv |
http://hdl.handle.net/1992/64012 |
dc.identifier.instname.es_CO.fl_str_mv |
instname:Universidad de los Andes |
dc.identifier.reponame.es_CO.fl_str_mv |
reponame:Repositorio Institucional Séneca |
dc.identifier.repourl.es_CO.fl_str_mv |
repourl:https://repositorio.uniandes.edu.co/ |
url |
http://hdl.handle.net/1992/64012 |
identifier_str_mv |
instname:Universidad de los Andes reponame:Repositorio Institucional Séneca repourl:https://repositorio.uniandes.edu.co/ |
dc.language.iso.es_CO.fl_str_mv |
eng |
language |
eng |
dc.rights.license.spa.fl_str_mv |
Atribución-NoComercial 4.0 Internacional |
dc.rights.uri.*.fl_str_mv |
http://creativecommons.org/licenses/by-nc/4.0/ |
dc.rights.accessrights.spa.fl_str_mv |
info:eu-repo/semantics/openAccess |
dc.rights.coar.spa.fl_str_mv |
http://purl.org/coar/access_right/c_abf2 |
rights_invalid_str_mv |
Atribución-NoComercial 4.0 Internacional http://creativecommons.org/licenses/by-nc/4.0/ http://purl.org/coar/access_right/c_abf2 |
eu_rights_str_mv |
openAccess |
dc.format.extent.es_CO.fl_str_mv |
36 páginas |
dc.format.mimetype.es_CO.fl_str_mv |
application/pdf |
dc.publisher.es_CO.fl_str_mv |
Universidad de los Andes |
dc.publisher.program.es_CO.fl_str_mv |
Geociencias |
dc.publisher.faculty.es_CO.fl_str_mv |
Facultad de Ciencias |
dc.publisher.department.es_CO.fl_str_mv |
Departamento de Geociencias |
institution |
Universidad de los Andes |
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Atribución-NoComercial 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Tary, Jean Baptistea4a003f8-5cbc-40e3-92a3-f86c011c9cf0600Londoño Vargas, Juan Pablo37afb24e-76b2-4f61-9b2d-b2640b65e3e9600Poveda Núñez, Hugo Esteban2023-01-19T19:55:41Z2023-01-19T19:55:41Z2023-01-18http://hdl.handle.net/1992/64012instname:Universidad de los Andesreponame:Repositorio Institucional Sénecarepourl:https://repositorio.uniandes.edu.co/The study was conducted in the Panama Basin, a zone with a complex system of mid-ocean ridges (MORs), explaining its intriguing thermal and seismic qualities and thereby making it an integral place for research. Similarly, the Panama Basin is a bathymetrically restricted oceanic basin situated in the Eastern Pacific near the subduction zone of Central and South America. A network of ocean bottom seismometers (OBS) was deployed in one of the mid ocean ridges, the Costa Rica Rift, and operated for 23 days from January 26 to February 16, 2015. Previous studies have used this data and discovered several microearthquakes following compelling spatiotemporal trends. Regardless, non-volcanic tremor indagation has remained quiet on this site. Non-volcanic tremors are the most familiar seismic waves detected during slow-slip events. They are weak continuous vibrations with no clear impulsive phases. We processed all available data from this network to investigate if non-volcanic tremors are occurring within the zone. To tackle the task, we developed a pipeline that consisted of generating seismograms, filtering them, extracting the event, and finally locating the events. We used the reverse time migration (RTM) technique to map the events since it detects and locates events with a low signal-to-noise ratio (SNR) with no need for phase identification or picking. We identified and mapped 226 possible tremor events in the vicinity of the Costa Rica Rift. They were compactly clustered around the southwest of the network, did not show temporal clusterization, and predominantly occurred on a day-by-day basis along the survey. The results are relevant since no non-volcanic tremor was reported either in that zone or in that tectonic setting (divergent margin). 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