Results 31 to 40 of about 35,702 (291)

The influence of noise sources on cross-correlation amplitudes [PDF]

open access: yes, 2012
We use analytical examples and asymptotic forms to examine the mathematical structure and physical meaning of the seismic cross correlation measurement.
Hanasoge, Shravan M.
core   +1 more source

Seismological expression of the iron spin crossover in ferropericlase in the Earth’s lower mantle

open access: yesNature Communications, 2021
This study identifies the predicted seismic expression of the high-to-low iron spin crossover in the deep Earth mineral ferropericlase. A depth-dependent signal is detected in the fastest and slowest regions, related to lateral temperature variations, of
Grace E. Shephard   +5 more
doaj   +1 more source

Combining ground penetrating radar and seismic surveys in the assessment of cultural heritage buildings: The study of roofs, columns, and ground of the gothic church Santa Maria del Mar, in Barcelona (Spain) [PDF]

open access: yes, 2019
Combined non-destructive techniques are applied in the study of a historical building in Barcelona. Santa Maria del Mar is a magnificent Mediterranean gothic church built between 1329 and 1383.
Caselles Magallón, Josep Oriol   +4 more
core   +2 more sources

Juan de Fuca subduction zone from a mixture of tomography and waveform modeling [PDF]

open access: yes, 2012
Seismic tomography images of the upper mantle structures beneath the Pacific Northwestern United States display a maze of high-velocity anomalies, many of which produce distorted waveforms evident in the USArray observations indicative of the Juan de ...
Chu, Risheng   +2 more
core   +1 more source

Validating tomographic model with broad-band waveform modelling: an example from the LA RISTRA transect in the southwestern United States [PDF]

open access: yes, 2007
Traveltime tomographic models of the LA RISTRA transect produce excellent waveform fits if we amplify the damped images. We observe systematic waveform distortions across the western edge of the Great Plains from South American events, starting about 300
Helmberger, Don. V., Song, Teh-Ru Alex
core   +1 more source

Time‐evolving seismic tomography: The method and its application to the 1989 Loma Prieta and 2014 South Napa earthquake area, California

open access: yesGeophysical Research Letters, 2017
We propose a time‐evolving approach to conduct traveltime seismic tomography in the 1989 Mw 6.9 Loma Prieta earthquake and 2014 Mw 6.0 South Napa earthquake area, California.
Ping Tong   +3 more
doaj   +1 more source

Imaging the Subsurface Structure of Mount Agung in Bali (Indonesia) Using Volcano-Tectonic (VT) Earthquake Tomography

open access: yesFrontiers in Earth Science, 2021
Local seismic tomography is a well-known and commonly used method for obtaining detailed information about the internal structure of volcanoes. The eruption of Mt. Agung in 2017 was a vital opportunity scientifically because it is the first eruption that
Ardianto Ardianto   +20 more
doaj   +1 more source

Measurements and Kernels for Source-Structure Inversions in Noise Tomography [PDF]

open access: yes, 2013
Seismic noise cross correlations are used to image crustal structure and heterogeneity. Typically, seismic networks are only anisotropically illuminated by seismic noise, a consequence of the non-uniform distribution of sources.
Hanasoge, Shravan M.
core   +1 more source

Recent progress on wave gradiometry method

open access: yes地球与行星物理论评, 2023
Wave gradiometry method is a data processing technique based on dense seismic arrays and is suitable for a variety of seismic signals/phases such as P-waves, S-waves, Rayleigh waves, Love waves, and ambient noise.
Feihuang Cao, Chuntao Liang
doaj   +1 more source

The Hudson Bay Lithospheric Experiment (HuBLE) : Insights into Precambrian Plate Tectonics and the Development of Mantle Keels [PDF]

open access: yes, 2015
The UK component of HuBLE was supported by Natural Environment Research Council (NERC) grant NE/F007337/1, with financial and logistical support from the Geological Survey of Canada, Canada–Nunavut Geoscience Office, SEIS-UK (the seismic node of NERC ...
Bastow, I. D.   +8 more
core   +2 more sources

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