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Hoshiba, Mitsuyuki; Rietbrock, Andreas; Scherbaum, Frank; Nakahara, Hisashi; Haberland, Christian

doi:10.1023/a:1011478202750

Cited by 72 publications

(2 citation statements)

References 29 publications

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“…Fehler et al (1992) introduced the MLTWA method for calculating the attenuation property of the subsurface. Further studies have already successfully applied the method (Hoshiba et al 2001;Giampiccolo et al 2006;Carcolé & Sato 2010;Meirova & Pinsky 2014;Bachura & Fischer 2016). Since the two attenuation parameters Q −1 i and Q −1 sc have a different influence on the envelope, the relative energy change of several time windows and over different distances can be used to determine the respective attenuation.…”

Section: Multiple Lapse Time Window Analysismentioning

confidence: 99%

Comparison of Multiple Lapse Time Window Analysis and Qopen to determine intrinsic and scattering attenuation

Laaten

Eulenfeld

Wegler

2021

Geophysical Journal International

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Summary This study compares the results of Multiple Lapse Time Windows Analysis (MLTWA) and full envelope inversion (Qopen) to determine intrinsic and scattering attenuation of the crust using the region around the central part of the Leipzig-Regensburg fault zone in Germany as an example. We use 18 of the region’s strongest earthquakes from 2008 to 2019 with a magnitude between 1.4 and 3.0 in the frequency band range between 3 and 34 Hz. The determined attenuation values of both methods are similar within their error bars. The inverse quality factors of the shear wave are relatively low compared to other regions, with values of 3.2 · 10−4 to 8.7 · 10−4 for $Q^{-1}_{i}$ and 1.4 · 10−4 to 2.8 · 10−4 for $Q^{-1}_{sc}$, respectively. As a by-product of Qopen, we also obtain the energy site amplification of the stations used in the inversion as well as source displacement spectra and moment magnitudes of the inverted earthquakes. Several combinations of inversion parameters were tested for MLTWA, with $Q^{-1}_{i}$ and $Q^{-1}_{sc}$ providing the lowest trade-off. Likewise, we investigated the influence of window length on the results of Qopen. We found a dependency of the results on the length, if the windows are shorter than 30 s. For longer time windows, the dependence disappears, and the result becomes independent of window length.

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Section: Multiple Lapse Time Window Analysismentioning

confidence: 99%

Comparison of Multiple Lapse Time Window Analysis and Qopen to determine intrinsic and scattering attenuation

Laaten

Eulenfeld

Wegler

2021

Geophysical Journal International

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“…By using these secondary incoherent arrivals in the seismogram, total attenuation may be separated into intrinsic attenuation (energy dissipated by the seismic waves while travelling through the medium) and scattering attenuation (energy lost due to the interaction of the seismic waves with the medium heterogeneities, and effectively recorded later in the seismogram as coda). Several methods have been devised to separate and image these two contributions to total attenuation (Hoshiba et al, 2001;Akinci et al, 1995;Del Pezzo et al, 2001Giampiccolo et al, 2006). In one of the first applications of scattering attenuation imaging, Nishigami (1997) found strong scattering bodies beneath volcanic areas, extending to 7 km (Mount Ontake volcano, Japan) and 20 km depths (Mount Nikko-Shirane volcano, Japan), respectively.…”

Section: Introductionmentioning

confidence: 99%

Scattering images from autocorrelation functions of P-wave seismic velocity images: the case of Tenerife Island (Canary Islands, Spain)

et al. 2018

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We present a P-wave scattering image of the volcanic structures under Tenerife Island using the autocorrelation functions of P-wave vertical velocity fluctuations. We have applied a cluster analysis to total quality factor attenuation (−1) and scattering quality factor attenuation (−1) images to interpret the structures in terms of intrinsic and scattering attenuation variations on a 2D plane, corresponding to a depth of 2000 m, and check the robustness of the scattering imaging. The results show that scattering patterns are similar to total attenuation patterns in the South of the island. There are two main areas where patterns differ: at Cañadas-Teide-Pico Viejo Complex high total attenuation and average-to-low scattering values are observed. We interpret the difference as induced by intrinsic attenuation. In the Santiago Ridge Zone (SRZ) region, high scattering values correspond to average total attenuation. In our interpretation, the anomaly is induced by an extended scatterer, geometrically related to the surficial traces of Garachico and El Chinyero historical eruptions and the area of highest seismic activity during the 2004-2008 seismic crises.

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Coda-Wave Based Monitoring of Pore-Pressure Depletion-driven Compaction of Slochteren Sandstone Samples from the Groningen Gas Field

Zotz-wilson¹,

Filippidou²,

Linden³

et al. 2020

Preprint

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Untitled

Cited by 72 publications

References 29 publications

Comparison of Multiple Lapse Time Window Analysis and Qopen to determine intrinsic and scattering attenuation

Comparison of Multiple Lapse Time Window Analysis and Qopen to determine intrinsic and scattering attenuation

Scattering images from autocorrelation functions of P-wave seismic velocity images: the case of Tenerife Island (Canary Islands, Spain)

Coda-Wave Based Monitoring of Pore-Pressure Depletion-driven Compaction of Slochteren Sandstone Samples from the Groningen Gas Field

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