Results 31 to 40 of about 287 (147)

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

Impacts of Spatial and Temporal Station Availability on Gridded Precipitation Products in Central America

Earth and Space Science, Volume 12, Issue 12, December 2025.
Abstract Gridded precipitation data sets have become essential for understanding climate variability and long‐term trends; however, their accuracy and reliability strongly depend on the availability and the spatial and temporal distribution of in situ meteorological observations. Here, we evaluate the performance of four gridded precipitation products:
Isabel González‐Méndez, Diego Pons, Talia G. Anderson, Irma Ayes Rivera, Kevin J. Anchukaitis   +4 more
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

Impact assessment of earthquake early warning systems in Central America

Earthquake Spectra, Volume 41, Issue 4, Page 3094-3122, November 2025.
Earthquake Early Warning (EEW) systems aim to alert users in advance of imminent shaking, enabling them to take action. In collaboration with local seismic agencies, the Swiss Seismological Service (SED), has developed national EEW systems across Central America.
Benazir Orihuela, Athanasios N Papadopoulos, John Clinton, Griselda Marroquin, Marino Protti, Wilfried Strauch, Robin Yani‐Quiyuch, Laurentiu Danciu, Stefan Wiemer   +8 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

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

Locations of aftershocks of the Oaxaca earthquake using smoked paper recorders and digital event recorders

Geofísica Internacional, 1978
Dentro de un proyecto cooperativo entre ClCESE y UCSD, .se instaló una red de 15 sismográfos en la región de las réplicas del temblor de Oaxaca (Ms= 7.8), de Noviembre 29, 1978.
A. Reyes, J. González, L. Munguia, A. Nava, F. Nernon, J. N. Brune   +5 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

The Oaxaca Mexico, earthquake of 29 november 1978: a preliminary report on aftershocks

Geofísica Internacional, 1978
El área de réplicas del período del 1 o. al 12 de diciembre de 1978 para el temblor de Oaxaca (29 de noviembre, 1978; Ms= 7.8) se estima en 6000 km2.  El temblor· parece llenar el tramo de quietud sísmico entre los temblores de 196.5 (Ms =7.6) y .1968 ...
S. K. Singh, J. Havskov, K. Mcnally, L. Ponce, T. Hearh, M. Vassilious   +5 more
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