A5079170679- Geological and Geochemical Analysis
- earthquake and tectonic studies
- High-pressure geophysics and materials
- Seismic Waves and Analysis
- Geophysical and Geoelectrical Methods
- Landslides and related hazards
- Geological and Tectonic Studies in Latin America
- Seismic Imaging and Inversion Techniques
- Geochemistry and Geologic Mapping
- Geological and Geophysical Studies
- Geophysical Methods and Applications
- Geotechnical Engineering and Underground Structures
- Mineral Processing and Grinding
- Geomagnetism and Paleomagnetism Studies
- Karst Systems and Hydrogeology
- Infrastructure Resilience and Vulnerability Analysis
- Geological and Geophysical Studies Worldwide
- Botany and Geology in Latin America and Caribbean
- Tree Root and Stability Studies
- Business, Education, Mathematics Research
- Hydrocarbon exploration and reservoir analysis
- Administrative Law and Governance
- Geological Modeling and Analysis
- Dam Engineering and Safety
- Human Rights and Immigration
Universidad Nacional de San Agustin de Arequipa
2017-2024
Universidade de Brasília
2017-2020
Instituto Geofísico del Perú
2014-2018
Universidade do Oeste Paulista
2018
Instituto de Geociencias
2018
Centro de Tecnologias Estratégicas do Nordeste
2018
Center for Scientific Research and Higher Education at Ensenada
2008
The use of geophysical characterization karst systems can provide an economical and non-invasive alternative for extracting information about cavities, sinkholes, pathways water infiltration as well the degree karstification underlying carbonate rocks. In present study, three techniques, namely, Ground Penetrating Radar (GPR), Electrical Resistivity Tomography (ERT) Very Low Frequency Electromagnetic (VLFEM) methods were applied at different locations in relation to fluvial karst, which is...
Abstract Nazca subduction beneath South America is one of our best modern examples long‐lived ocean‐continent on the planet, serving as a foundation for understanding processes. Within that framework, persistent heterogeneities at range scales in both and plates difficult to reconcile without detailed knowledge subducted slab structure. Here we use teleseismic travel time residuals from >1,000 broadband short‐period seismic stations across single tomographic inversion produce...
Abstract The dynamics of flat subduction, particularly the interaction between a slab and overriding plate, are poorly understood. Here we study (seismically) anisotropic properties deformational regime mantle directly above Peruvian slab. We analyze shear wave splitting from 370 local S events at 49 stations across southern Peru. find that appears to be anisotropic, with modest average delay times (~0.28 s) consistent ~4% anisotropy in ~30 km thick layer. most likely mechanism is...
We studied the attenuation of local and regional earthquake body waves recorded by seismic network northeastern Sonora, Mexico (Red Sismica del Noreste de Sonora [RESNES]). The source-station paths selected data set cover epicentral region May 1887 ( M w 7.5) earthquake. used best-located earthquakes RESNES between 2003 2004 to analyze spectral amplitude decay with hypocentral distance. database consists 44 magnitudes 1.8 3.2 distances 25 150 km. calculated Fourier amplitudes from more than...
SUMMARY The Andean Subduction Zone is one of the longest continuous subduction zones on Earth. relative simplicity two-plate system has makes it an ideal natural laboratory to study dynamics in zones. We measure teleseismic S and SKS traveltime residuals at >1000 seismic stations that have been deployed across South America over last 30 yr produce a finite-frequency S-wave tomography model mantle beneath related Nazca Plate, spanning from ∼5°N 45°S depths ∼130 1200 km. Within our...
Earth and Space Science Open Archive This is a preprint has not been peer reviewed. ESSOAr venue for early communication or feedback before review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing an older version [v1]Go to new versionThe potential use of geophysical methods identify cavities, sinkholes pathways water infiltration: case study from Mambaí, BrazilAuthors Yawar Hussain iD Rogério Uagoda Welitom Borges José Gustavo da Silva Nunes Omar Hamza...
Rainfall-induced variations in pore water pressures are the most common sources of significant disasters like landslides, dams’ failure, and other structural collapses. This study aimed at communicating preliminary results seasonal monitoring Sobradinho landslide, Brasilia, Brazil, using ambient seismic noise. The noise was recorded before, during after rainy season with three L4-3A seismometers (2Hz) installed a triangular array landslide mass. These records were processed horizontal to...
Earth and Space Science Open Archive This is a preprint has not been peer reviewed. ESSOAr venue for early communication or feedback before review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v2]The potential use of geophysical methods to identify cavities, sinkholes pathways water infiltration: case study from Mambaí, BrazilAuthors Yawar Hussain iD Rogério Uagoda Welitom Borges José Gustavo da Silva Nunes Omar Hamza...
Mudflow is often associated with seismic activities. The present study applied a based detection of the surface waves generated by mudflow Brumadinho dam collapse using records Brazilian Seismographic Network. signal envelope and time-frequency spectrograms signals were used in analysis. As result, successfully detected from data recorded at nearby station. findings this provide good basis for future research to develop flood early warning system on cost-effective, remote contentious...
ABSTRACT. Recent studies have shown that urban ambient noise (UAN) decreased at many sites due to a slowdown in human activities brought by the SARS-CoV-2 (COVID-19) pandemic lockdowns. Such understanding is inferred from historical record of levels, which may also help us disambiguate sources as required for tomography, microseismic and other seismic based studies. As UAN site-specific, its analysis enables passive situational awareness, therefore, present study, we analyzed temporal...
The aim of this work was study the effects climate and vegetation on moisture content present in soils that support a complex system which comprises pasture micro-forest area, at Center for Innovation Technology Transfer Technological University Panama located Aguadulce, Coclé. For such purposes, geophysical monitoring carried out through four electrical resistivity tomographies 23.5 m long profile developed rainy season from July 9 to October 29, 2019 with time lapses 38, 34 39 days between...