Tsunamis Recorded in Tide Gauges at Costa Rica Pacific Coast and their Numerical Modeling
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2017
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Chacon-Barrantes, Silvia
Gutiérrez-Echeverría, Alejandro
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Resumen Aquí realizamos un inventario de tsunamis registrado por mareógrafos en la costa del Pacífico de Costa Rica. Este documento también revela nueve registros de tsunamis que no se habían publicado antes, en el indicador de mareas de Puntarenas correspondiente al tsunami de Colombia de 1979 y en el indicador de mareas de Quepos correspondiente a los tsunamis gemelos de México de 1985, los tsunamis de Chile de 2010, 2014 y 2015, el tsunami de Tonga de 2006 , el tsunami de Japón de 2011 y el tsunami de las Islas Salomón de 2013. El registro original del tsunami de Cóbano de 1990 en Quepos se digitalizó nuevamente a una resolución más alta y se volvió a procesar. La llegada de los tsunamis de 1979, 1985, 2006 y 2014 a Costa Rica no figura en los catálogos de tsunamis. La altura máxima del tsunami obtenida aquí después de procesar los registros de 1990, 2011 y 2013 fue mayor que la informada en los catálogos. Lo contrario sucedió con el tsunami de 2010. Se analizó el registro del indicador de Quepos para enero de 2007, ya que parecía haber registrado el tsunami de las Islas Kuriles, pero los resultados no fueron concluyentes debido a la baja tasa de muestreo y la pequeña amplitud del tsunami, si la hubiera. Todos esos once tsunamis fueron modelados y los resultados comparados con los registros. Se obtuvo un buen acuerdo para el indicador de Quepos, aunque los tsunamis modelados de 2011 y 2013 tuvieron una diferencia de 8 minutos en la hora de llegada. Se obtuvo un acuerdo aceptable para el indicador de Puntarenas para el tsunami de 1979, considerando que se pierden al menos las primeras 4 h de la caligrafía.
Here we perform an inventory of tsunamis recorded by tide gauges in the Pacific coast of Costa Rica. This paper also reveals nine tsunami records that had not been published before, at Puntarenas tide gauge corresponding to the 1979 Colombia tsunami and at Quepos tide gauge corresponding to the 1985 Mexico twin tsunamis, the 2010, 2014 and 2015 Chile tsunamis, the 2006 Tonga tsunami, the 2011 Japan tsunami and the 2013 Solomon Islands tsunami. The original record of 1990 Co´bano tsunami at Quepos was digitized again at a higher resolution and re-processed. The arrival of 1979, 1985, 2006 and 2014 tsunamis to Costa Rica is not listed on tsunami catalogs. The maximum tsunami height obtained here after processing 1990, 2011 and 2013 records was higher than reported on catalogs. The opposite happened for the 2010 tsunami. Quepos gauge record for January 2007 was analyzed as it seemed to have registered the Kuril Islands tsunami, but the results were not conclusive due to the low sample rate and the small tsunami amplitude if any. All those eleven tsunamis were modeled and the results compared with the records. A good agreement was obtained for the Quepos gauge, although the modeled 2011 and 2013 tsunamis had a difference of 8 min on the arrival time. An acceptable agreement was obtained for the Puntarenas gauge for 1979 tsunami, considering at least the first 4 h of the marigram is lost.
Here we perform an inventory of tsunamis recorded by tide gauges in the Pacific coast of Costa Rica. This paper also reveals nine tsunami records that had not been published before, at Puntarenas tide gauge corresponding to the 1979 Colombia tsunami and at Quepos tide gauge corresponding to the 1985 Mexico twin tsunamis, the 2010, 2014 and 2015 Chile tsunamis, the 2006 Tonga tsunami, the 2011 Japan tsunami and the 2013 Solomon Islands tsunami. The original record of 1990 Co´bano tsunami at Quepos was digitized again at a higher resolution and re-processed. The arrival of 1979, 1985, 2006 and 2014 tsunamis to Costa Rica is not listed on tsunami catalogs. The maximum tsunami height obtained here after processing 1990, 2011 and 2013 records was higher than reported on catalogs. The opposite happened for the 2010 tsunami. Quepos gauge record for January 2007 was analyzed as it seemed to have registered the Kuril Islands tsunami, but the results were not conclusive due to the low sample rate and the small tsunami amplitude if any. All those eleven tsunamis were modeled and the results compared with the records. A good agreement was obtained for the Quepos gauge, although the modeled 2011 and 2013 tsunamis had a difference of 8 min on the arrival time. An acceptable agreement was obtained for the Puntarenas gauge for 1979 tsunami, considering at least the first 4 h of the marigram is lost.
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TSUNAMIS, COSTA RICAN, QUEPOS (AGUIRRE), TiIDE GAUGES, NUMERICAL MODEL