Browsing by Subject "EARTHQUAKES"
Now showing items 1-20 of 31
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A Creep Event on the Shallow Interface of the Nicoya Peninsula, Costa Rica Seismogenic Zone
(American Geophysical Union, 2004)Summary of the paper "A Creep Event on the Shallow Interface of the Nicoya Peninsula, Costa Rica Seismogenic Zone" -
Aftershocks of the 2012 Mw 7.6 Nicoya, Costa Rica, earthquake and mechanics of the plate interface
(Seismological Society of America (SSA), 2017-05-02)Subduction of the Cocos plate beneath the Nicoya Peninsula, Costa Rica, generates large underthrusting earthquakes with a recurrence interval of about 50 yrs. The most recent of these events occurred on 5 September 2012 ... -
Along-strike variability in the seismogenic zone below Nicoya Peninsula, Costa Rica
(American Geophysical Union, 2002)At the subduction zone in northwestern Costa Rica, the seismogenic zone lies directly beneath the Nicoya Peninsula, allowing for near source seismic studies of earthquake activity. We located 650 earthquakes along the ... -
Análisis de la actividad sísmica en Costa Rica durante el 2010 y resumen de los eventos sísmicos más importantes presentados en Costa Rica de 1983 - 2012
(Universidad de Costa Rica, 2014-01)El objetivo de este trabajo es analizar la actividad sísmica registrada por la red sismográfica del OVSICORI-UNA en el año 2010; además de recopilar información de los sismos más importantes sentidos por la población del ... -
Coda wave attenuation in the Parecis Basin, Amazon Craton, Brazil: sensitivity to basement depth
(Springer, 2011)Small local earthquakes from two aftershock sequences in Porto dos Gaúchos, Amazon craton—Brazil, were used to estimate the coda wave attenuation in the frequency band of 1 to 24 Hz. The time-domain coda-decay method of ... -
Deslizamientos provocados por el terremoto de Cinchona de 2009, Costa Rica
(Universidad Nacional, Costa Rica., 2013)El 8 de enero del 2009 ocurrió un sismo que generó una gran cantidad de deslizamientos, los cuales fueron la causa de severos daños ambientales y sociales. La nubosidad de la zona solo permitió hacer mapas aproximados del ... -
Earthquake and tsunami forecasts: Relation of slow slip events to subsequent earthquake rupture
(National Academy of Sciences, 2014-11-17)The 5 September 2012 Mw 7.6 earthquake on the Costa Rica subduction plate boundary followed a 62-y interseismic period. Highprecision GPS recorded numerous slow slip events (SSEs) in the decade leading up to the earthquake, ... -
Earthquake magnitude calculation without saturation from the scaling of peak ground displacement
(Geophysical Research Letters, 2015-06-02)GPS instruments are noninertial and directly measure displacements with respect to a global reference frame, while inertial sensors are affected by systematic offsets—primarily tilting—that adversely impact integration to ... -
Estimating tsunami potential of earthquakes in the Sumatra-Andaman region based on broadband seismograms in India
(Universidad Nacional, Costa Rica., 2012)In this paper, we report that the ratio of broadband energy (0.01–2 Hz) to highfrequency energy (0.3–2 Hz), Er, estimated from regional seismograms of India, might be a useful parameter in estimating tsunami potential of ... -
Estudio del efecto de un terremoto sobre un marco geodésico de referencia
(Universidad Nacional (Costa Rica), 2020-01-31)El objetivo de esta investigación es determinar el impacto en un conjunto de dieciséis estaciones GNSS localizadas en Costa Rica, tras el terremoto del 05 de septiembre de 2012. La investigación ... -
Estudio planimétrico y altimétrico de deformación de la corteza terrestre en la Ciudad Santiago de Puriscal, mediante el GPS
(Universidad Nacional (Costa Rica), 2007)Catastro y Geodesia y del Instituto Costarricense de Electricidad, se realizó el siguiente proyecto que consiste en un estudio de deformación. Para este fin, se llevaron a cabo mediciones planimétricas en la ciudad con ... -
Far-field triggering of foreshocks near the nucleation zone of the 5 September 2012 (MW 7.6) Nicoya Peninsula, Costa Rica earthquak
(Elsevier, 2015-12-01)On 5 September 2012, a moment magnitude (MW) 7.6 earthquake occurred directly beneath the Nicoya Peninsula, an area with dense seismic and geodetic network coverage. The mainshock ruptured a portion of a previously identified ... -
Intensidades macrosísmicas del sismo de Capellades del 30 de noviembre de 2016 (Mw = 5,4) y el contexto sísmico de la región central de Costa Rica
(Universidad Industrial de Santander, 2020-01)El 30 de noviembre del 2016, a las 18:25 hora local, se generó un sismo que se localizó a 4,4 km al noroeste de Capellades de Alvarado, Cartago, Costa Rica; con una magnitud de Mw = 5,4. De acuerdo con la Escala de ... -
Mantenimiento de marcos geodésicos de referencia: estudio de la evolución post-sísmica tras el terremoto del 05 de setiembre del 2012 en Nicoya, Costa Rica
(Universidad Nacional (Costa Rica), 2016-11)Se muestran los resultados del estudio realizado sobre la cinemática de la zona afectada por el terremoto ocurrido en la región de Samara en el año 2012, a través del procesamiento de las observaciones de un conjunto de ... -
Mechanics of back arc deformation in Costa Rica: Evidence from an aftershock study of the April 22, 1991, Valle de la Estrella, Costa Rica, earthquake (Mw=7.7)
(American Geophysical Union, 1994-10)The April 22, 1991, Mw=7.7 Valle de la Estrella, Costa Rica, earthquake represents back arc thrusting of the Caribbean plate beneath the Panama block along the North Panama Thrust Belt. Large back arc thrusting events are ... -
Monitoring transient changes within overpressured regions of subduction zones using ambient seismic noise
(American Association for the Advancement of Sciences (AAAS), 2016)In subduction zones, elevated pore fluid pressure, generally linked to metamorphic dehydration reactions, has a profound influence on the mechanical behavior of the plate interface and forearc crust through its control on ... -
Nicoya earthquake rupture anticipated by geodetic measurement of the locked plate interface
(Nature Research, 2013-12-22)The Nicoya Peninsula in Costa Rica is one of the few places on Earth where the seismically active plate interface of a subduction zone is directly overlaid by land rather than ocean. At this plate interface, large megathrust ... -
OKSP: a novel deep learning automatic event detection pipeline for seismic monitoring in Costa Rica
(Instituto de Ingenieros Eléctricos y Electrónicos (IEEE), 2021)Small magnitude earthquakes are the most abundant but the most difficult to locate robustly and well due to their low amplitudes and high frequencies usually obscured by heterogeneous noise sources. They highlight crucial ... -
Recurrencia de sismos en el Valle Central de Costa Rica
(REVISTA GEOGRÁFICA DE AMÉRICA CENTRAL, 2018)En los periodos 1910-1912, 1951-1955 y 1990-1993 se localizaron en el Valle Central de Costa Rica sismos superficiales importantes, por su magnitud y daños causados en la población, estructura y paisaje. La recurrencia de ... -
Regional characteristics of observable foreshocks
(Seismological Society of America (SSA), 2022)Measures of foreshock occurrence are systematically examined using earthquake catalogs for eight regions (Italy, southern California, northern California, Costa Rica, Onshore Japan, Alaska, Turkey, and Greece) after imposing ...