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Now showing items 161-170 of 170
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 ...
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 ...
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 ...
Yield estimates for the six North Korean nuclear tests from teleseismic P wave modeling and intercorrelation of P and Pn recordings
(AGU Advancing Earth and Space Sciences, 2019)
The yields of the six declared underground nuclear tests at the North Korean test site are estimated using high-frequency teleseismic P wave amplitude modeling and waveform equalization of short-period teleseismic P waves ...
Yield estimate (230 kt) for a Mueller-Murphy model of the 3 september 2017, North Korean nuclear test (mbNEIC = 6.3) from teleseismic broadband P waves assuming extensive near-source damage
(AGU Advancing Earth and Space Sciences, 2018)
The 3 September 2017 underground nuclear test (mbNEIC= 6.3) is the largest of six announced North Korean explosions. The event generated many P wave seismograms at global broadband seismic stations with good signal-to-noise ...
The 27 February 2022 Lop Nor earthquake: detectability, location, and discrimination
(Seismological Society of America (SSA), 2022)
A seismic event with mb 4.8 (Mw 4.2) was detected close to the Chinese Lop Nor nuclear test site on 27 February 2022. Waveforms recorded at regional and far regional distances in central Asia indicate greater likeness with ...
Repeating earthquakes record fault weakening and healing in areas of megathrust postseismic slip
(American Association for the Advancement of Sciences (AAAS), 2020)
Repeating earthquakes (REs) rupture the same fault patches at different times allowing temporal variations in the mechanical behavior of specific areas of the fault to be interrogated over the earthquake cycle. We study ...
Global quieting of high-frequency seismic noise due to COVID-19 pandemic lockdown measures
(American Association for the Advancement of Science (AAAS), 2020)
Human activity causes vibrations that propagate into the ground as high-frequency seismic waves. Measures to mitigate the coronavirus disease 2019 (COVID-19) pandemic caused widespread changes in human activity, leading ...
El sismo del Cerro de la Muerte, Pérez Zeledón, Ml=5,4, del 21 de octubre de 2023
(Universidad Nacional, Costa Rica, 2023)
Informe enmarcado dentro del Proyecto Red de Monitoreo Geodinámico de Costa Rica 2019-2023
Resumen de sismicidad por meses en Costa Rica enero- diciembre 2023
(Universidad Nacional, Costa Rica, 2023)
Se presenta un resumen del comportamiento sismológico en los meses de enero a diciembre del año 2023