Publications

Latest update : 3 March 2015.

Latest articles

Asymmetry of coda cross-correlation function: dependence of the epicenter location

K. Emoto , M. Campillo , F. Brenguier , X. Briand , and T. Takeda

Tuesday 3 March 2015, by briandx // Publications

Asymmetry of coda cross-correlation function: dependence of the epicenter location
K. Emoto , M. Campillo , F. Brenguier , X. Briand , and T. Takeda
Abstract
We analyze the cross-correlation function (CCF) of coda of earthquakes, which is used to retrieve the Green’s function between two stations as well as the CCF of ambient noise. We select 74 Hi-net stations located in eastern Japan and 66 earthquakes to calculate the CCF. For each earthquake, we calculate the CCFs 10 between (...) Read more »

Imaging pre- and co-eruptive structural and mechanical changes on a volcano with ambient seismic noise

Anne Obermann, Thomas Planes, Eric Larose, Michel Campillo

Thursday 24 April 2014, by briandx // Publications

Imaging pre- and co-eruptive structural and mechanical changes on a volcano with ambient seismic noise.
Anne Obermann, Thomas Planes, Eric Larose, Michel Campillo
Abstract
Forecasting the location of an eruption is of primary importance for risk management in volcanic regions. Locating the underground structural changes associated with a potential eruption is also a key issue to better understand the dynamics at work in a volcano. Based on recent results in wave physics, we develop an (...) Read more »

Seismic velocity variations at TCDP are controlled by MJO driven precipitation pattern and high fluid discharge properties

G. Hillers, M. Campillo, K.-F. Ma

Thursday 24 April 2014, by briandx // Publications

Seismic velocity variations at TCDP are controlled by MJO driven precipitation pattern and high fluid discharge properties
G. Hillers, M. Campillo, K.-F. Ma
Abstract
Using seismic noise based monitoring techniques we find that seismic velocity variations (dv / v) observed with the borehole array of the Taiwan Chelungpu-fault Drilling Project (TCDP) are controlled by strong precipitation events associated with the Madden–Julian Oscillation (MJO), a dynamic intraseasonal atmospheric (...) Read more »

Depth sensitivity of seismic coda waves to velocity perturbations in an elastic heterogeneous medium

Anne Obermann, Thomas Planes, Eric Larose, Christoph Sens-Schonfelder, Michel Campillo

Wednesday 16 April 2014, by briandx // Publications

Depth sensitivity of seismic coda waves to velocity perturbations in an elastic heterogeneous medium.
Anne Obermann, Thomas Planes, Eric Larose, Christoph Sens-Schonfelder,Michel Campillo
Abstract
Numerous monitoring applications make use of seismic coda waves to evaluate velocity changes in the Earth. This raises the question of the spatial sensitivity of coda-wave-based measurements. Here, we investigate the depth sensitivity of coda waves to local velocity perturbations using (...) Read more »

Seismic noise correlations to image structural and mechanical changes associated with the Mw7.9 2008 Wenchuan earthquake.

A. Obermann, B. Froment, M. Campillo, E. Larose, T. Planes,B. Valette, J.H. Chen, Q.Y. Liu.

Wednesday 16 April 2014, by briandx // Publications

Seismic noise correlations to image structural and mechanical changes associated with the Mw7.9 2008 Wenchuan earthquake.
A. Obermann, B. Froment, M. Campillo, E. Larose, T. Planes,B. Valette, J.H. Chen, Q.Y. Liu.
JOURNAL OF GEOPHYSICAL RESEARCH
Abstract
We locate temporal changes of seismic wave speed and scattering properties of the crust associated with the 2008 Mw 7.9 Wenchuan earthquake. To that end, we analyze ambient seismic noise records from 2007 until the end of 2008 in the (...) Read more »

Double beamforming processing in a seismic prospecting.

Pierre Boue, Philippe Roux, Michel Campillo and Benoit de Cacqueray.

Monday 29 April 2013, by briandx // Publications

Double beamforming processing in a seismic prospecting.
Pierre Boue, Philippe Roux, Michel Campillo and Benoit de Cacqueray.
In GEOPHYSICS, 78(3), V101–V108.
Abstract
The use of large number of sensors is becoming more common both at large continental scale for deep-structure in seismology and at smaller scale with exploration geophysics objectives. Seismic arrays require array processing from which new type of observables contribute to a better understanding of the wave propagation (...) Read more »

Teleseismic correlations of ambient seismic noise for deep global imaging of the Earth.

P. Boué, P. Poli, M. Campillo, H. Pedersen, X. Briand, P. Roux.

Monday 29 April 2013, by briandx // Publications

Teleseismic correlations of ambient seismic noise for deep global imaging of the Earth.
P. Boué, P. Poli, M. Campillo, H. Pedersen, X. Briand, P. Roux.
Geophysical Journal International 2013, in press.
Abstract
We present here a global analysis showing that wave paths probing the deepest part of the Earth can be obtained from ambient noise records. Correlations of seismic noise recorded at sensors located various distances
apart provide new virtual seismograms for paths that are not (...) Read more »

Helmholtz Tomography of ambient noise surface wave data to estimate Scholte wave phase velocity at Valhall Life of the Field.

Aurelien Mordret, Nikolai M. Shapiro, Satish S. Singh, Philippe Roux, and Olav I. Barkved.

Thursday 11 April 2013, by briandx // Publications

Helmholtz Tomography of ambient noise surface wave data to estimate Scholte wave phase velocity at Valhall Life of the Field.
Aurelien Mordret, Nikolai M. Shapiro, Satish S. Singh, Philippe Roux, and Olav I. Barkved.
GEOPHYSICS, VOL. 78, NO. 2 (MARCH-APRIL 2013)
Abstract
We applied the ’Helmholtz tomography’ technique to 6.5 hours of continuous seismic noise record dataset of the Valhall Life of Field network. This network, that has 2320 receivers, allows us to perform a multi-frequency (...) Read more »

Azimuthal Anisotropy at Valhall: the Helmholtz Equation Approach.

Aurélien Mordret, Nikolaı M. Shapiro, Satish Singh, Philippe Roux, Jean-Paul Montagner, Olav. I. Barkved.

Thursday 11 April 2013, by briandx // Publications

Azimuthal Anisotropy at Valhall: the Helmholtz Equation Approach.
Aurélien Mordret, Nikolaı M. Shapiro, Satish Singh, Philippe Roux, Jean-Paul Montagner, Olav. I. Barkved.
GEOPHYSICAL RESEARCH LETTERS.
Abstract
We used 6 hours of continuous vertical records from 2320 sensors of the Valhall Life of Fields Seismic network to compute 2 690 040 cross-correlation functions between the full set of sensor pair combinations. We applied the ’Helmholtz tomography’ approach combined with the ambient (...) Read more »

Near surface study at the Valhall oil field from Ambient Noise Surface Wave Tomography.

A. Mordret, M. Landes, N. M. Shapiro, S. C. Singh, P. Roux and O. I. Barkved.

Wednesday 20 March 2013, by briandx // Publications

Near surface study at the Valhall oil field from Ambient Noise Surface Wave Tomography.
A. Mordret, M. Landes , N. M. Shapiro, S. C. Singh, P. Roux and O. I. Barkved
Abstract
We used 6 hours of continuous seismic noise records from 2320 4-components sensors of the Valhall Life of Field Seismic network to compute cross-correlations of ambient seismic noise. A beamforming analysis showed that at low frequencies (below 2 Hz) the seismic noise sources were spatially homogeneously (...) Read more »

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