Coda Wave Interferometry for Estimating Nonlinear Behavior in Seismic Velocity

Snieder, Roel; Grêt, Alexandre; Douma, Huub; Scales, John A.

doi:10.1126/science.1070015

Cited by 536 publications

(523 citation statements)

References 28 publications

(22 reference statements)

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“…The comparison of such NCFs from different times is the second step of PII that usually makes use of the high sensitivity of scattered coda waves to changes of subsurface properties (Poupinet et al 1984;Snieder et al 2002). This allows to monitor tiny velocity changes very precisely down to a fraction of 1 per cent, for example 0.2 per cent reported by Poupinet et al (1984), 0.1 per cent by Sens-Schönfelder & Wegler (2006) or 0.05 per cent by Brenguier et al (2008b).…”

Section: Introductionmentioning

confidence: 99%

Monitoring of environmental influences on seismic velocity at the geological storage site for CO2 in Ketzin (Germany) with ambient seismic noise

Gassenmeier¹,

Sens‐Schönfelder²,

Delatre³

et al. 2014

Geophysical Journal International

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Originally published as:Gassenmeier, M., Sens-Schönfelder, C., Delatre, M., Korn, M. (2015): Monitoring of environmental influences on seismic velocity at the geological storage site for CO2 in Ketzin (Germany) with ambient seismic noise. S U M M A R YRegarding the exploitation of natural resources, storage of waste or subsurface construction, there is an increasing need to obtain comprehensive knowledge about the subsurface and its temporal changes. We investigate the possibility of a passive monitoring using ambient seismic noise, which is cheap and continuous compared to active seismics. We work with data acquired with a seismic network in Ketzin (Germany) where 67 271 tons of CO 2 were injected from 2008 June until 2013 August into a saline aquifer at a depth of about 650 m. Monitoring the expansion of the CO 2 plume is essential for the characterization of the reservoir as well as the detection of potential leakage. By cross-correlating about 4 yr of passive seismic data in a frequency range of 0.05-4.5 Hz we found periodic velocity variations with a period of approximately 1 yr that cannot be caused by the CO 2 injection. The prominent direction of the noise wavefield indicates a wind farm as the dominant source providing the temporally stable noise field. This spacial stability excludes variations of the noise source distribution as a cause of spurious velocity variations. Based on an amplitude decrease associated with time windows towards later parts of the coda, we show that the variations must be generated in the shallow subsurface. A comparison to groundwater level data reveals a direct correlation between depth of the groundwater level and the seismic velocity. The influence of ground frost on the seismic velocities is documented by a sharp increase of velocity when the maximum daily temperature stays below 0 • C. Although the observed periodic changes and the changes due to ground frost affect only the shallow subsurface, they mask potential signals of material changes from the reservoir depths.

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Section: Introductionmentioning

confidence: 99%

Monitoring of environmental influences on seismic velocity at the geological storage site for CO2 in Ketzin (Germany) with ambient seismic noise

Gassenmeier¹,

Sens‐Schönfelder²,

Delatre³

et al. 2014

Geophysical Journal International

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“…As suggested by Poupinet et al (1984), the key to the precise observation of minute changes is the use of the scattered seismic wavefield that forms the coda of seismic records. This concept was extended and termed Coda Wave Interferometry by Snieder et al (2002) and Snieder (2006). Coda waves are highly sensitive to changes of subsurface properties because they accumulate the effect of medium changes during their extended propagation time.…”

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confidence: 99%

Field observations of seismic velocity changes caused by shaking-induced damage and healing due to mesoscopic nonlinearity

et al. 2016

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“…Because they travel very long paths, scattered waves are much more sensitive to weak variations of medium properties than direct waves. This idea has led to the to seismic "doublet" technique [1], and has recently undergone a vigorous revival under the name Coda Wave Interferometry [15]. This idea was also investigated in optics and in acoustics where it has led to the so-called Diffuse (Acoustic) Waves Spectroscopy technique [16,17].…”

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confidence: 99%

Temporal changes in the lunar soil from correlation of diffuse vibrations

Sens‐Schönfelder

Larose

2008

Phys. Rev. E

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International audienceIt was recently demonstrated that one can reconstruct the impulse response between passive sensors, by cross-correlating diffuse waves or ambient noise. Using seismic waves recorded on the moon, we show here that not only direct waves can be retrieved but also late arrivals that have been scattered before reaching the seismometers. As these late arrivals propagate for longer time, they are more sensitive to weak perturbations of the medium such as velocity changes. This high sensitivity of scattered waves is used to monitor periodic velocity changes in the lunar soil by measuring small delays of the passively retrieved coda waves. The velocity changes result from temperature variations due to periodic heating of the lunar surface by the sun

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Coda Wave Interferometry for Estimating Nonlinear Behavior in Seismic Velocity

Cited by 536 publications

References 28 publications

Monitoring of environmental influences on seismic velocity at the geological storage site for CO2 in Ketzin (Germany) with ambient seismic noise

Monitoring of environmental influences on seismic velocity at the geological storage site for CO2 in Ketzin (Germany) with ambient seismic noise

Field observations of seismic velocity changes caused by shaking-induced damage and healing due to mesoscopic nonlinearity

Temporal changes in the lunar soil from correlation of diffuse vibrations

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