Results 51 to 60 of about 3,318 (226)

Assessment of seismic station performance in north Chhattisgarh, India: a comprehensive ambient noise analysis

Geomatics, Natural Hazards & Risk
A new network of 16 broadband seismic stations is operational in the northern Chhattisgarh region to monitor the seismicity arising in the otherwise seismically quiescent zone. Ambient noise is comprehensively analyzed to evaluate station performance and
Maitreyi, Chandrani Singh, Arun Singh, Mita Uthaman, Sukanta Sarkar, Gaurav Kumar, Abhisek Dutta, Aamir Salam Siddiqui, Shirish Bose   +8 more
doaj   +1 more source

Seismic anisotropy from 6C ground motions of ambient seismic noise

Journal of Geophysical Research: Solid Earth
AbstractWe propose a new approach capable of measuring local seismic anisotropy from 6C (three‐component translation and three‐component rotation) amplitude observations of ambient seismic noise data. Our recent theory demonstrates that the amplitude ratio of 6C cross‐correlation functions (CCFs) enables retrieving the local phase velocity.
Tang, Le, Igel, Heiner, Montagner, Jean‐Paul, Vernon, Frank   +3 more
openaire   +4 more sources

High-Resolution Surface-Wave Tomography from Ambient Seismic Noise [PDF]

Science, 2005
Cross-correlation of 1 month of ambient seismic noise recorded at USArray stations in California yields hundreds of short-period surface-wave group-speed measurements on interstation paths. We used these measurements to construct tomographic images of the principal geological units of California, with low-speed anomalies corresponding to the main ...
Shapiro, N.M., Campillo, Michel, Stehly, L., Ritwoller, M.H.   +3 more
openaire   +3 more sources

Multi‐scale geophysical mapping of the brine and bedrock surfaces along the Dolores River, Paradox Valley, Colorado, December 2023

Near Surface Geophysics, Volume 24, Issue 1, Page 36-49, February 2026.
Abstract Total dissolved solids derived from salt dome–sourced brine in the underlying alluvial aquifer substantially increase with distance in the reach of the Dolores River that passes through Paradox Valley in southwestern Colorado. The area has been the site of salinity control operations since the 1990s to reduce salt loading to the downstream ...
Neil Terry, Alisa Mast, Andrea Creighton, Joel Homan, Connor Newman, Suzanne Paschke   +5 more
wiley   +1 more source

SeisMIC - an Open Source Python Toolset to Compute Velocity Changes from Ambient Seismic Noise

Seismica
We present SeisMIC, a fast, versatile, and adaptable open-source software to estimate seismic velocity changes from ambient seismic noise. SeisMIC includes a broad set of tools and functions to facilitate end-to-end processing of ambient noise data ...
Peter Makus, Christoph Sens-Schönfelder
doaj   +1 more source

Rayleigh waves from correlation of seismic noise in Great Island of Tierra del Fuego, Argentina: Constraints on upper crustal structure

Geodesy and Geodynamics, 2018
In this study, the ambient seismic noise cross-correlation technique is applied to estimate the upper structure of the crust beneath Great Island of Tierra del Fuego (TdF), Argentina, by the analysis of short-period Rayleigh wave group velocities.
Carolina Buffoni, Martin Schimmel, Nora Cristina Sabbione, María Laura Rosa, Gerardo Connon   +4 more
doaj   +1 more source

Seismic attenuation tomography of Eastern Europe from ambient seismic noise analysis

Geophysical Journal International, 2023
SUMMARY The Eastern-Europe region (EER), is a complex geotectonic area that captures part of the Alpine-Himalayan Orogen, the subduction of multiple NeoTethys Branches and part of the East European Craton. It is one of the most exciting geological areas in Europe due to a diversity of tectonic processes acting within it: extensional ...
F Borleanu, L Petrescu, A O Placinta, F Magrini, B Grecu, M Radulian, L De Siena   +6 more
openaire   +1 more source

Lithospheric Delamination Below the North American Midcontinent Ceased Subsidence in Cratonic Basins

AGU Advances, Volume 7, Issue 1, February 2026.
Abstract Cratonic lithospheres carry a long history of tectonic modifications that result in heterogeneous structures, as revealed by an increasing number of geophysical observations. The existence of cratonic basins indicates protracted periods of tectonic modification, causing subsidence within global continental interiors.
Xiaotao Yang, Lihang Peng, Andrea Stevens Goddard, Lijun Liu   +3 more
wiley   +1 more source

Ambient noise multimode surface wave tomography

Progress in Earth and Planetary Science
Seismic techniques using earthquakes are powerful tools for exploring the Earth’s internal structure. However, the earthquake distribution limits the spatial resolution.
Kiwamu Nishida, Ryota Takagi, Akiko Takeo   +2 more
doaj   +1 more source

Density of Sodium Aluminosilicate Melts Along the NaAlSiO4‐NaAlSi3O8 Join at High Pressure: In‐Situ Measurements and Re‐Calibration of a Modified Hard‐Sphere Equation of State For Silicate Melts

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.
Abstract Silicate melts play a crucial role in planetary differentiation. The density contrast between silicate melts and the surrounding solid residue exerts a primary control on many magmatic processes. However, direct measurements of the density of silicate melts at high pressure (P) and temperature (T) conditions remain challenging, particularly ...
Man Xu, Zhicheng Jing, James A. Van Orman, Qingyang Hu, Qi Chen, Tony Yu, Yanbin Wang   +6 more
wiley   +1 more source