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Volcanology and Seismology x clear all

A 2-D enlarged cell technique (ECT) for elastic wave modelling on a curved free surface

Songlin Wei, Mingwei Zhuang, Jianyang Zhou and Qing Huo Liu.

in Geophysical Journal International

P ublished online March 2015 .

Journal Article. Subjects: Volcanology and Seismology. 5701 words.

The conventional finite-difference time-domain (FDTD) method for elastic waves suffers from the staircasing error when applied to model a curved free surface because of the structured grid....

A 3-D enlarged cell technique (ECT) for elastic wave modelling of a curved free surface

Songlin Wei, Jianyang Zhou, Mingwei Zhuang and Qing Huo Liu.

in Geophysical Journal International

P ublished online July 2016 .

Journal Article. Subjects: Volcanology and Seismology. 7215 words.

The conventional finite-difference time-domain (FDTD) method for elastic waves suffers from the staircasing error when applied to model a curved free surface because of its structured grid....

Absorption and scattering 2-D volcano images from numerically calculated space-weighting functions

Edoardo Del Pezzo, Jesus Ibañez, Janire Prudencio, Francesca Bianco and Luca De Siena.

in Geophysical Journal International

P ublished online April 2016 .

Journal Article. Subjects: Volcanology and Seismology. 5959 words.

Short-period small magnitude seismograms mainly comprise scattered waves in the form of coda waves (the tail part of the seismogram, starting after S waves and ending when the noise...

Accuracy of the water column approximation in numerically simulating propagation of teleseismic PP waves and Rayleigh waves

Yong Zhou, Sidao Ni, Risheng Chu and Huajian Yao.

in Geophysical Journal International

P ublished online June 2016 .

Journal Article. Subjects: Volcanology and Seismology. 8739 words.

Numerical solvers of wave equations have been widely used to simulate global seismic waves including PP waves for modelling 410/660 km discontinuity and Rayleigh waves for imaging crustal...

Accurate 3-D finite difference computation of traveltimes in strongly heterogeneous media

M. Noble, A. Gesret and N. Belayouni.

in Geophysical Journal International

P ublished online October 2014 .

Journal Article. Subjects: Volcanology and Seismology. 6698 words.

Seismic traveltimes and their spatial derivatives are the basis of many imaging methods such as pre-stack depth migration and tomography. A common approach to compute these quantities is to...

Acoustic- and elastic-waveform inversion using a modified total-variation regularization scheme

Youzuo Lin and Lianjie Huang.

in Geophysical Journal International

P ublished online November 2014 .

Journal Article. Subjects: Volcanology and Seismology. 7757 words.

Subsurface velocities within the Earth often contain piecewise-constant structures with sharp interfaces. Acoustic- and elastic-waveform inversion (AEWI) usually produces smoothed inversion...

Acoustic wave-equation-based earthquake location

Ping Tong, Dinghui Yang, Qinya Liu, Xu Yang and Jerry Harris.

in Geophysical Journal International

P ublished online February 2016 .

Journal Article. Subjects: Volcanology and Seismology. 8269 words.

We present a novel earthquake location method using acoustic wave-equation-based traveltime inversion. The linear relationship between the location perturbation (δt 0, δxnull...

Active transverse faulting within underthrust Indian crust beneath the Sikkim Himalaya

Himangshu Paul, Supriyo Mitra, S.N. Bhattacharya and G. Suresh.

in Geophysical Journal International

P ublished online March 2015 .

Journal Article. Subjects: Volcanology and Seismology. 7462 words.

Deep focus earthquakes within the underthrust Indian lower crust beneath the Himalaya occur in very specific regions and have distinct source characteristics. The study of the source...

An Adaptable Seismic Data Format

Lion Krischer, James Smith, Wenjie Lei, Matthieu Lefebvre, Youyi Ruan, Elliott Sales de Andrade, Norbert Podhorszki, Ebru Bozdağ and Jeroen Tromp.

in Geophysical Journal International

P ublished online August 2016 .

Journal Article. Subjects: Volcanology and Seismology. 7473 words.

We present ASDF, the Adaptable Seismic Data Format, a modern and practical data format for all branches of seismology and beyond. The growing volume of freely available data coupled with...

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Advanced GPR imaging of sedimentary features: integrated attribute analysis applied to sand dunes

Wenke Zhao, Emanuele Forte, Giorgio Fontolan and Michele Pipan.

in Geophysical Journal International

P ublished online December 2017 .

Journal Article. Subjects: Volcanology and Seismology. 7176 words.

Summary

We evaluate the applicability and the effectiveness of integrated GPR attribute analysis to image the internal sedimentary features of the Piscinas...