Mauro Häusler


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Häusler

First Name

Mauro

ORCID

0000-0002-0755-5434

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2016 - 2019262020 - 202618
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Publications1 - 10 of 44
  • Monitoring Rock Slope Instabilities Using Frequency Domain Decomposition Modal Analysis
    Item type: Conference Poster
    Häusler, Mauro; Michel, Clotaire; Burjánek, Jan; et al. (2021)
  • Structural Characterization of a Toppling Rock Slab From Array-Based Ambient Vibration Measurements and Numerical Modal Analysis
    Item type: Journal Article
    Bessette-Kirton, Erin K.; Moore, Jeffrey R.; Geimer, Paul R.; et al. (2022)
    Journal of Geophysical Research: Earth Surface
    Accurate assessments of the internal structure and boundary conditions of unstable rock slopes are imperative for evaluating landslide hazard scenarios. However, instability characterization at depth remains challenging and is often limited by costly or invasive subsurface investigations. Here, we develop a new approach coupling array-based ambient vibration modal analysis and numerical modeling to improve structural characterization of rock slope instabilities at depth. We used ambient noise cross-correlation on 4 hr of seismic data recorded by an array of 30 nodal geophones at a 500-m-long toppling rock slab in Utah, USA to identify modal frequencies between 0.8 and 3.5 Hz and derive modal displacements. We show that transverse and longitudinal bending modes span the length of the instability, indicating an interconnected slab. Statistical comparison of field results with outputs from >1,000 finite element models with varying boundary conditions showed that the instability depth varies between 40-70 and 10-20 m in the middle and lateral regions, respectively. Our approach yields new information on the structural conditions of rock cliff and column instabilities at depth, which is not easily obtained by other means but is imperative for change detection monitoring and improved hazard assessments.
  • Investigating neotectonic expressions of the Neuhausen fault zone with seismic exploration techniques
    Item type: Conference Poster
    Häusler, Mauro; Schmelzbach, Cédric; Spillman, Thomas; et al. (2018)
  • Earthquake-induced mass movements in Switzerland: overview on past and ongoing projects
    Item type: Other Conference Item
    Häusler, Mauro; Glueer, Franziska; Fäh, Donat (2020)
    Abstract Volume 18th Swiss Geoscience Meeting
  • Seismic spatial wavefield gradient and rotation measurements in land-seismic exploration
    Item type: Conference Poster
    Schmelzbach, Cédric; Sollberger, David Andres; van Renterghem, Cédéric; et al. (2016)
  • Analysis of large rock slope instabilities using frequency domaindecomposition modal analysis
    Item type: Other Conference Item
    Häusler, Mauro; Michel, Clotaire; Burjánek, Jan; et al. (2019)
    Geophysical Research Abstracts
  • Rotational motion and spatial wavefield gradient data in seismic exploraiton - a review
    Item type: Other Conference Item
    Schmelzbach, Cédric; Sollberger, David Andres; Van Renterghem, Cédéric; et al. (2019)
    Online Abstracts: 5th International Working Group on Rotational Seismology Workshop (IWGoRS 2019)
  • Source-side spatial wavefield gradients in land seismic exploration
    Item type: Journal Article
    Van Renterghem, Cédéric; Schmelzbach, Cédric; Sollberger, David Andres; et al. (2019)
    Geophysics
  • 36 Component Seismic Data: Investigating Translational and Rotational Components in Exploration Seismology
    Item type: Master Thesis
    Häusler, Mauro (2016)
    In conventional multicomponent seismic exploration, the wavefield is recorded by measuring translational motions in three directions using three-component sensors. A novel approach in land seismic acquisition is to additionally record the rotational components of the wavefield around the various Cartesian axes and to combine them with translational measurements. Additional rotational measurements provide the opportunity to locally extract valuable information on the propagating wavefield, that either cannot be obtained from conventional translational measurements alone or are challenging to extract. For example, rotational data facilitate wavefield separation, shear-wave (S-wave) imaging, and ground roll suppression because of the direct link between rotation and the S-wave component, but also enable local instantaneous phase velocity estimation. At the Earth’s free surface, rotational motions can be expressed in terms of spatial seismic wavefield gradients. Wavefield gradients can be estimated by differencing the outputs of closely spaced three-component translational sensors. The same approach can be adapted to source arrays: differencing of recordings from closely spaced translational (directed) sources can be used to simulate rotational sources that primarily emit S-waves. The combination of three components of translation and three components of rotation on both the source and the receiver side leads to a total of 36 measurable seismic components. In this thesis, I first verify that array-derived rotational rates, estimated using spatial seismic wavefield gradients, correspond to direct rotation measurements from rotational sensors. Then, I investigate the value of 36-component seismic data using synthetic as well as real field data. I show that rotational components around the vertical axis mainly contain horizontally polarized S-waves. I found that rotational components around the crossline (transverse horizontal) axis mainly contain ground-roll and vertically polarized S-waves and that these data can be combined with translational data to suppress ground roll. I show that the amplitudes of rotational components are dependent on the angle of incidence of the wavefield and that source-sided rotational components are reciprocal to receiver-sided rotational components. To accelerate multicomponent acquisition, I furthermore present a new multicomponent seismic vector-source, which uses the Galperin configuration to obtain orthogonal vector sources of equal impact patterns and constant source-coupling. This source allows a fast multicomponent dataacquisition in engineering and environmental exploration seismology.
  • Seismic spatial wavefield gradient and rotation measurements as new observables in seismic exploration
    Item type: Other Conference Item
    Schmelzbach, Cédric; Häusler, Mauro; Sollberger, David Andres; et al. (2016)
Publications1 - 10 of 44