Results 31 to 40 of about 286 (143)

Brittle‐Ductile Deformation and Tensile Rupture of Dome Lava During Inflation at Santiaguito, Guatemala

Journal of Geophysical Research: Solid Earth, Volume 124, Issue 10, Page 10107-10131, October 2019., 2019
Abstract Gas‐and‐ash explosions at the Santiaguito dome complex, Guatemala, commonly occur through arcuate fractures, following a 5‐ to 6‐min period of inflation observed in long‐period seismic signals. Observation of active faults across the dome suggests a strong shear component, but as fault propagation generally proceeds through the coalescence of ...
Adrian J. Hornby, Yan Lavallée, Jackie E. Kendrick, Silvio De Angelis, Anthony Lamur, Oliver D. Lamb, Andreas Rietbrock, Gustavo Chigna   +7 more
wiley   +1 more source

Procesamiento Digital de Señales Sismicas con Matlab

Revista de Investigación de Física, 2007
El objetivo del presente trabajo es implementar un algoritmo para la identificación de los parámetros de la onda sísmica como son: las fases P y S, amplitud, periodo y duración.
César Omar Jiménez Tintaya
doaj   +1 more source

Seismic Waveform Inversion for 3‐D S‐ and P‐Wave Velocity Structure in D″ Beneath Central America and the Caribbean: Evidence for Chemical Heterogeneity Due To MORB Accumulation

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 10, October 2025.
Abstract We perform inversion of seismic waveforms for three‐dimensional (3‐D) models of shear and compressional seismic wave velocities (VS ${V}_{S}$ and VP ${V}_{P}$, respectively) in the lowermost 400 km of the mantle (the D″ region) beneath Central America and the Caribbean. We use data primarily from USArray stations.
Rei Sato, Kenji Kawai, Robert J. Geller
wiley   +1 more source

Radial S wave velocity structure of the D” region under a spot of the D" region under a spot of the east central Pacific Ocean

Geofísica Internacional, 2012
Se determinó la estructura radial de velocidades para la onda S en la base del manto en un área del Océano Pacífico centro-oriental centrada en los 19°N, 132°O. Se aplicó la técnica de la constante de disipación en el dominio de la frecuencia a las ondas
Luis F. Terán-Mendieta, Raúl Valenzuela Wong   +1 more
doaj   +1 more source

Refining the Eruption Chronology of Atitlán Caldera Through Zircon Double‐Dating

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 3, March 2025.
Abstract Precise dating of Quaternary volcanism is vital for risk mitigation, understanding volcano‐climate interactions, and deciphering the evolution of large silicic magmatic systems. The Atitlán caldera in Guatemala has experienced major eruptions that challenge radiometric dating techniques and complicate eruption chronology in this densely ...
Alejandro Cisneros de León, Martin Danišík, Axel K. Schmitt, Julie C. Schindlbeck‐Belo, Steffen Kutterolf, Tushar Mittal, Jennifer M. Garrison, Kenneth W. W. Sims   +7 more
wiley   +1 more source

Resolución del problema directo de tomografía sísmica: trazado de rayos sísmicos en el clúster de Pisayambo

La Granja: Revista de Ciencias de la Vida, 2012
Este ensayo muestra los resultados prácticos de la aplicación del principio de Fermat para trazar rayos sísmicos a través de un medio heterogéneo. Para comenzar se muestran las ventajas de aplicar este principio físico en lugar de resolver las ecuaciones
Sebastián Araujo
doaj   +1 more source

Widespread D″ ${\mathbf{D}}^{\mathbf{{\prime\prime}}}$ Anisotropy Beneath North America and the Northeastern Pacific and Implications for Upper Mantle Anisotropy Measurements

Journal of Geophysical Research: Solid Earth, Volume 129, Issue 10, October 2024.
Abstract Observations of seismic waves that have passed through the Earth's lowermost mantle provide insight into deep mantle structure and dynamics, often on relatively small spatial scales. Here we use SKS, S2KS, S3KS, and PKS signals recorded across a large region including the United States, Mexico, and Central America to study the deepest mantle ...
Jonathan Wolf, Daniel A. Frost, Alexia Brewster, Maureen D. Long, Ed Garnero, John D. West   +5 more
wiley   +1 more source

Bubble pulses and power spectra of some marine seismograms

Geofísica Internacional, 1975
Sismogramas marinos de un reconocimiento marino de refracción hecho en el Lago Superior con explosivos "geogel" se estudian en función de su contenido espectral en relación a varios tamaños de detonación (1.25-200 libras).
L.N.S. Kunar
doaj   +1 more source

Investigating the Last Millennium Coulomb Stress Transfer in the Central Apennine Fault System (CAFS)

Tectonics, Volume 43, Issue 10, October 2024.
Abstract The Central Apennine Fault System (CAFS) characterizes an active tectonic region of significant importance, witnessing numerous destructive seismic events over the last millennia. Although numerous studies have underscored the role of Coulomb stress transfer (CST) in initiating some of the most catastrophic earthquakes, investigations focusing
G. Valentini, T. Volatili, P. Galli, E. Tondi   +3 more
wiley   +1 more source

Travel times and ray paths for continous media

Geofísica Internacional, 1985
Las observaciones de tiempos de recorrido y amplitudes son de gran importancia en la interpretación sismológica tanto de fuente como de estructura. Se presenta aquí un método nuevo para obtener tiempos de recorrido y rayos para medios cuya velocidad de ...
A. Madrid
doaj   +1 more source