Results 31 to 40 of about 1,427 (180)

On the correlation between earthquake coda horizontal-to-vertical spectral ratios and amplification functions at the KiK-net network

Frontiers in Earth Science, 2022
The Japanese KiK-net network comprises about 700 stations spread across the whole territory of Japan. For most of the stations, VP and VS profiles were measured down to the bottom borehole station.
Francesco Panzera, Paolo Bergamo, Vincent Perron, Donat Fäh   +3 more
doaj   +1 more source

Impact of External Mechanical Loads on Coda Waves in Concrete

Materials, 2022
During their life span, concrete structures interact with many kinds of external mechanical loads. Most of these loads are considered in advance and result in reversible deformations. Nevertheless, some of the loads cause irreversible, sometimes unnoticed changes below the macroscopic scale depending on the type and dimension of the impact.
Fabian Diewald, Niklas Epple, Thomas Kraenkel, Christoph Gehlen, Ernst Niederleithinger   +4 more
openaire   +2 more sources

Numerically Calculated 3D Space-Weighting Functions to Image Crustal Volcanic Structures Using Diffuse Coda Waves

Geosciences, 2018
Seismic coda measurements retrieve parameters linked to the physical characteristics of rock volumes illuminated by high frequency scattered waves. Space weighting functions (SWF) and kernels are different tools that model the spatial sensitivity of coda
Edoardo Del Pezzo, Angel De La Torre, Francesca Bianco, Jesús Ibanez, Simona Gabrielli, Luca De Siena   +5 more
doaj   +1 more source

Special focus/Rapid Communication Moment magnitudes of two large Turkish earthquakes on February 6, 2023 from long-period codaKey points

Earthquake Science, 2023
Two large earthquakes (an earthquake doublet) occurred in south-central Turkey on February 6, 2023, causing massive damages and casualties. The magnitudes and the relative sizes of the two mainshocks are essential information for scientific research and ...
Xinyu Jiang, Xiaodong Song, Tian Li, Kaixin Wu   +3 more
doaj   +1 more source

Coda-derived source properties estimated using local earthquakes in the Sea of Marmara, Türkiye [PDF]

Solid Earth
Accurate estimates of the moment magnitude of earthquakes that physically measure the earthquake source energy are crucial for improving our understanding of seismic hazard in regions prone to tectonic activity. To address this demand, a method involving
B. Özkan, T. Eken, P. Gaebler, T. Taymaz   +3 more
doaj   +1 more source

Moment magnitude estimates for central Anatolian earthquakes using coda waves [PDF]

Solid Earth, 2019
A proper estimate of moment magnitude, which is a physical measure of the energy released at an earthquake source, is essential for better seismic hazard assessments in tectonically active regions.
T. Eken
doaj   +1 more source

Probing environmental and tectonic changes underneath Mexico City with the urban seismic field [PDF]

Solid Earth, 2023
The sediments underneath Mexico City have unique mechanical properties that give rise to strong site effects. We investigated temporal changes in the seismic velocity at strong-motion and broadband seismic stations throughout Mexico City, including sites
L. A. Ermert, L. A. Ermert, E. Cabral-Cano, E. Chaussard, D. Solano-Rojas, L. Quintanar, D. Morales Padilla, E. A. Fernández-Torres, M. A. Denolle   +8 more
doaj   +1 more source

Perturbation analysis of travel-time accuracy for core phases reconstructed from seismic interferometry [PDF]

Solid Earth
Correlating late coda waves from large earthquakes produces stable waveforms that approximate inter-station core phases. However, the properties of these coda waves often violate the strict assumptions underlying classical Green's function retrieval ...
Y. Xia, Y. Xia, Y. Xia, X. Feng, X. Feng, X. Chen, X. Chen   +6 more
doaj   +1 more source

P-wave scattering and the distribution of heterogeneity around Etna volcano

Annals of Geophysics, 2016
Volcanoes and fault zones are areas of increased heterogeneity in the Earth crust that leads to strong scattering of seismic waves. For the understanding of the volcanic structure and the role of attenuation and scattering processes it is important to ...
Toni Zieger, Christoph Sens-Schönfelder, Joachim R.R. Ritter, Birger-Gottfried Lühr, Torsten Dahm   +4 more
doaj   +1 more source

Time-Lapse Cross-Well Monitoring of CO₂ Sequestration Using Coda Wave Interferometry

Remote Sensing, 2022
In this study, we explored the capability of coda wave interferometry (CWI) for monitoring CO2 storage by estimating the seismic velocity changes caused by CO2 injection. Given that the CWI method is highly efficient, the primary aim of this study was to
Zhuo Xu, Fengjiao Zhang, Christopher Juhlin, Xiangbo Gong, Liguo Han, Calin Cosma, Stefan Lueth   +6 more
doaj   +1 more source