Minimum 1D P wave velocity model for the Cordillera Volcanica de Guanacaste, Costa Rica
- 1. Universidad de Costa Rica, Escuela Centroamericana de Geologia (Costa Rica)
- 2. Red Sismologica Nacional (RSN: UCR-ICE), Apdo. 214-2060, San Pedro, Costa Rica (Costa Rica)
- 3. Instituto Costarricense de Electricidad, Observatorio Sismologico Vulcanologico Arenal-Miravalles (OSIVAM), Apdo. 0032-1000, San Jose, Costa Rica (Costa Rica)
Description
A minimum velocity model is derived from 475 local earthquakes registered by the Observatorio Vulcanologico y Sismologico Arenal Miravalles (OSIVAM) for the Cordillera Volcanica de Guanacaste, between January 2006 and July 2014. The model has consisted of six layers from the surface up to 80 km the depth. The model has presented speeds varying between 3,96 and 7,79 km/s. The corrections obtained from the seismic stations have varied between -0,28 to 0,45, and they have shown a trend of positive values on the volcanic arc and negative on the forearc, in concordance with the crustal thickness. The relocation of earthquakes have presented three main groups of epicenters that could be associated with activity in inferred failures. The minimum ID velocity model has provided a simplified idea of the crustal structure and aims to contribute with the improvement of the routine location of earthquakes performed by OSIVAM. (author)
Availability note (English)
Also available from Biblioteca Luis Demetrio Tinoco, Universidad de Costa Rica; Also available on line: https://revistas.ucr.ac.cr/index.php/geologica/article/view/23283/24611Abstract (Spanish)
Un modelo minimo unidimensional de velocidades es calculado a partir de 475 sismos locales registrados por el Observatorio Vulcanologico y Sismologico Arenal Miravalles (OSIVAM) para la Cordillera Volcanica de Guanacaste, entre enero del 2006 y julio del 2014. El modelo ha consistido de seis capas desde la superficie hasta 80 km de profundidad. El modelo ha presentado velocidades variantes entre 3,96 y 7,79 km/s. Las correciones obtenidas de las estaciones sismicas han variado entre -0,28 a 0,45, y han mostrado una tendencia de valores positivos sobre el arco volcanico y negativos en el antearco, en concordancia con el espesor de la corteza. La relocalizacion de los sismos han presentado tres grupos principales de epicentros que podrian asociarse con actividad en fallas inferidas. El modelo minimo unidimensional de velocidades ha brindado una idea simplificada de la estructura de la corteza y pretende contribuir con el mejoramiento de la localizacion rutinaria de sismos realizados por el OSIVAM. (autor)Additional details
Additional titles
- Original title (Spanish)
- Modelo minimo unidimensional de velocidades de la onda P para la Cordillera Volcanica de Guanacaste, Costa Rica
Publishing Information
- Journal Title
- Revista Geologica de America Central
- Journal Issue
- no.54
- Journal Page Range
- p. 179-191
- ISSN
- 0256-7024
INIS
- Country of Publication
- Costa Rica
- Country of Input or Organization
- Costa Rica
- INIS RN
- 48069942
- Subject category
- S58: GEOSCIENCES;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- CORRECTIONS; EARTH CRUST; EARTHQUAKES; EVALUATED DATA; GEOLOGIC STRUCTURES; ONE-DIMENSIONAL CALCULATIONS; SEISMIC DETECTION; SEISMIC P WAVES; SEISMIC WAVES; SEISMOLOGY; TOMOGRAPHY; VELOCITY
- Descriptors DEC
- DATA; DETECTION; DIAGNOSTIC TECHNIQUES; INFORMATION; NUMERICAL DATA; SEISMIC EVENTS; SEISMIC WAVES
Optional Information
- Notes
- Figs., tabs., refs.