Anne-Sophie Mreyen

Anne-Sophie Mreyen
University of Liège | ulg · Applied Geophysics (ArGEnCo)

Ph.D.

About

32
Publications
8,867
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59
Citations
Introduction
Anne-Sophie Mreyen currently works at the Department of Applied Geophysics, University of Liège. Anne-Sophie does research in Geophysics, Geomodelling and Engineering Geology. Their most recent publication is 'Multiple geophysical investigations to characterise massive slope failure deposits: application to the Balta rockslide, Carpathians'.
Additional affiliations
February 2021 - July 2021
University of Liège
Position
  • PostDoc Position
Education
October 2016 - January 2021
University of Liège
Field of study
  • Geology
October 2013 - June 2016
RWTH Aachen University
Field of study
  • Geophysics, Engineering Geology, Hydrogeology

Publications

Publications (32)
Article
Ancient landslides of unknown origin can be found in large numbers in mountainous regions; some represent valid markers of (pre-)historic natural regimes referring to either long-term evolution or short-term peak events of climatic and seismotectonic nature. An example is represented by the Balta rockslide in the Romanian Carpathian Mountains. Its...
Preprint
First analyses of landslide distribution and triggering factors are presented for the region affected by the August, 14, 2021, earthquake (Mw=7.2) in the Nippes Department, Haiti. Landslide mapping was mainly carried out by comparing pre- and post-event remote imagery (~0.5–1-m resolution) available on Google Earth Pro® and Sentinel-2 (10-m resolut...
Preprint
Full-text available
Ancient landslides of unknown origin can be found in large numbers in hilly and mountainous regions ; some represent valid markers of (pre-)historic natural regimes referring to either long-term evolution or short-term peak events of climatic and seismotectonic nature. The Balta rockslide in the Romanian Carpathian Mountains represents such a key s...
Article
Full-text available
There have been many studies exploring rainfall-induced slope failures in earthquake-affected terrain. However, studies evaluating the potential effects of both landslide-triggering factors – rainfall and earthquakes – have been infrequent despite rising global landslide mortality risk. The SE Carpathians, which have been subjected to many large hi...
Preprint
There have been many studies exploring the rainfall induced slope failures in the earthquake affected terrain. However, studies evaluating the potential effects of both landslide triggering factors; rainfall and earthquake have been infrequent despite the rising global landslide mortality risk. The SE Carpathians, which have been subjected to many...
Conference Paper
Full-text available
The proposed research aims at the investigation of large mass movements on volcanic islands, like the San Andres landslide on El Hierro island (Canary Islands, Spain). These coastal and submarine landslides are extremely large (with run-out exceeding tens of km) and voluminous (up to hundreds of km 3). They represent therefore a major geological ha...
Article
Full-text available
In the frame of a Belgo-Haitian cooperation project (PIC 2012-2016), a study of the local seismic hazard was performed in Fond Parisien, an area located on the foothills of the "Massif de la Selle", along the easternmost portion of the Enriquillo Plantain Garden Fault (EPGF). The H/V Spectral Ratio (HVSR) technique was applied to study the resonanc...
Conference Paper
Full-text available
To better comprehend mechanisms at the origin of natural slope failures, a vast number ofpotential slope weakening and failure triggering factors ought to be considered. Especially forrather ancient slope failures, such factors can be difficult to identify and strongly depend on theregional to local climatic as well as seismo-tectonic context.An ex...
Conference Paper
Full-text available
Seismic stability evaluation plays a crucial role in landslide disaster risk reduction. Related modeling also has to consider the potential influences of the rainfall on the hillslopes. This study aims at understanding the relative influence of the seismic loading and extreme cumulative rainfall on a massive active landslide in the seismically acti...
Article
Origins of ancient rockslides in seismic regions can be controversial and must not necessarily be seismic. Certain slope morphologies hint at a possible co-seismic development, though further analyses are required to better comprehend their failure history, such as modelling the slope in its pre-failure state and failure development in static and d...
Chapter
Full-text available
The stability of rock slopes is often guided by the structural geology of the rocks composing the slope. In this work, we analyse the influence of structural characteristics, and of their seismic response, on large and deep-seated rock slope failure development. The study is focused on the Tamins and Fernpass rockslides in the Alps and on the Balta...
Article
Full-text available
The stability of rock slopes is often guided significantly by the structural geology of the rocks composing the slope. In this work, we analysed the influences of structural characteristics, and of their seismic responses, on large and deep-seated rock slope failure development. The study was focused on the Tamins and Fernpass rockslides in the Eur...
Poster
Full-text available
Assessing the geometry and volume of mass movements is essential for the appraisal of slope stability and for the understanding of slope failure trigger mechanisms. For the latter, we developed seismic ambient noise measurement techniques in order to better characterize the sub-surface of ancient deep-seated landslides in seismic regions, as in Car...
Conference Paper
Assessing the geometry and volume of mass movements is essential for the appraisal of slope stability and for the understanding of slope failure trigger mechanisms. For the latter, we developed seismic ambient noise measurement techniques in order to better characterize the sub-surface of ancient deep-seated landslides in seismic regions, as in Car...
Poster
Full-text available
The mapping of internal structures of landslides is a challenging task. However, several investigation methods are commonly used to comprehend the interior of a slope. First, there is direct exploration, such as drilling and trenching, enabling a direct contact to the material of the subsoil. Secondly, there is indirect exploration comprising geoph...
Conference Paper
Full-text available
The southeastern part of the Carpathian Mountains (region of Vrancea, Romania) is prone to high magnitude earthquakes (M>7) with deep hypocenters (60-200 km). It is known that the 1940 (M7.7) and 1977 (M7.2) Vrancea earthquakes induced several landslides. This region also presents numerous large slopes with morphologies which might be due to seismi...
Conference Paper
Full-text available
Geophysical prospection methods facilitate near surface investigations, especially in complex or remote environments where direct exploration, such as drilling or trenching, are unfeasible or too expensive. Multiple techniques can be used for a vast number of survey targets in different study areas. However, on very large and heterogeneous sites, s...
Conference Paper
Full-text available
The task of characterising deep-seated mass movements in mountainous regions is challenging, especially if age and circumstances of the failure are unknown. In this work, we illustrate the potential of geophysical investigation methods on two old landslide bodies in the SE Carpathians and present integrated results in the form of high resolution 3D...
Article
Full-text available
Geomorphological markers such as scarps, river diversions and slope failures can be used as proxy indicators for the seismotectonic activity of a region. This study concentrates on the Malmedy-Bévercé area, E-Belgium, where formerly unknown geomorphological features have been recently discovered in the frame of a new regional geological mapping cam...
Chapter
As a geologist, you are always faced with one fundamental problem: the scales under which geology operates do not generally match well with those of humans. A geologist cannot dissect the Earth to watch the tectonic plates shift and slide across the mantle, they can’t peer inside a crystal as it forms and they can’t watch the full saga of climate c...
Chapter
As a geologist, you are always faced with one fundamental problem: the scales under which geology operates do not generally match well with those of humans. A geologist cannot dissect the Earth to watch the tectonic plates shift and slide across the mantle, they can’t peer inside a crystal as it forms and they can’t watch the full saga of climate c...
Article
Full-text available
Geohazard research requires extensive spatiotemporal understanding based on an adequate multi-scale representation of modelling results. The most commonly applied representation basis for collected data is still the one of a 2D plane, typically a map. Digital maps of spatial data can be visualised and processed by using Geographic Information Syste...
Conference Paper
Full-text available
We will present a series of new integrated 3D models of landslide sites that were investigated in distinctive seismotectonic and climatic contexts: (1) along the Hockai Fault Zone in Belgium and (2) in the seismic region of Vrancea, Romania. Both sites are deep-seated failures located in more or less seismically active areas. In such areas, slope s...
Conference Paper
Full-text available
This paper presents a series of new integrated 3D models of landslide sites that were investigated in very distinctive seismotectonic and climatic contexts in NW and SE Europe as well as in Central Asia (Tien Shan). First, we analyse ancient landslides with likely seismic origin marked by deep-seated failures, by a steep scarp and a massive failed...
Poster
Full-text available
We present a series of new integrated 3D models of landslide sites that were investigated in distinctive seismo-tectonic and climatic contexts: (1) along the Hockai Fault Zone in Belgium, with the 1692 Verviers Earthquake (M ~ 6 - 6.5) as most prominent seismic event that occurred in that fault zone, and (2) in the seismic region of Vrancea, Rom...
Conference Paper
Full-text available
In this application paper we'll explain the work flow we use to create immersive visualizations and spatial interaction for geophysical data with a head mounted device (HMD). The data that we analyze consists of two dimensional geographical map data and raw geophysical measurements with devices like seismometers, Electrical Resistivity Tomography (...
Poster
Full-text available
During several years, a series of geophysical surveys have been carried out in East Belgium to study the seismically active Hockai Fault Zone (HFZ). The most prominent earthquake that occurred in that fault zone is the 1692 Verviers Earthquake with a magnitude of M6-6.5; it is also the largest historical seismic event in NW Europe. The geomorphic i...
Poster
During several years, a series of geophysical surveys have been carried out in East Belgium to study the seismically active Hockai Fault Zone (HFZ). The most prominent earthquake that occurred in that fault zone is the 1692 Verviers Earthquake with a magnitude of M6-6.5; it is also the largest historical seismic event in NW Europe. The geomorphic i...

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Projects

Projects (2)
Archived project
This PhD project aims at significantly improving the assessment of earthquake-induced landslide hazards. Thus, it may also contribute to more reliable long-term seismic hazard predictions in seismically active regions marked by a hilly or mountainous relief. Main study areas are, respectively, in NW Europe (Hockai Fault Zone - HFZ, Belgium, marked by the historical 1692 Verviers event with M>=6), in SE Europe (Vrancea-Buzau seismic region, Carpathian Mountains Romania, with the 1802 earthquake of M~7.8–7.9 known as largest historical event) and in China (Longmenshan Mountains, hit by the Mw=7.9 Wenchuan earthquake in 2008).
Project
Together with the Institute of Geography, Romanian Ac. Sciences, we started to look for potential earthquake-triggered landslides in the SE Carpathians. Actually, this part of Europe is prone to high magnitude earthquakes with deep hypocentres. In recent historic times only a few small landslides were triggered by earthquakes (1940, 1977), but we found some large mass movements presenting a series of morphological features of seismically-induced slope failures (deep scarp, anti-dip slope failure, high on mountain, toe of scarp not touching the river). Those are probably older than 300 years and might be remnants of M~8 earthquake effects.