D. Köhn
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View article: Seismic data acquisition to combine high-resolution seismic reflection and full-waveform inversion – a case study for overdeepened valleys
Seismic data acquisition to combine high-resolution seismic reflection and full-waveform inversion – a case study for overdeepened valleys Open
In the context of the ICDP-project “Drilling Overdeepened Alpine Valleys”, the integration of high-resolution seismic reflection (HRSR) and full waveform inversion (FWI) is used to enhance detailed near-surface imaging in heterogeneous gla…
View article: Structure of the Multiphase Chalcolithic Tell Chiselet–Grădiștea Fundeanca (Romania) From SH‐Wave Full‐Waveform Inversion, Borehole Geophysics and Coring
Structure of the Multiphase Chalcolithic Tell Chiselet–Grădiștea Fundeanca (Romania) From SH‐Wave Full‐Waveform Inversion, Borehole Geophysics and Coring Open
The emergence and development of settlement mounds, also called tells, is of major interest for the analysis of socio‐economic transformations occurring in the lower Danube plain during the East European Chalcolithic period. In this contex…
View article: High-resolution SH-wave crosshole seismic full-waveform inversion in the glacially overdeepened Tannwald Basin
High-resolution SH-wave crosshole seismic full-waveform inversion in the glacially overdeepened Tannwald Basin Open
During the Quaternary, the Rhine Glacier formed several overdeepened valleys, including the Tannwald Basin (ICDP site 5068_1, Germany) about 45 km North of Lake Constance. These structures form sedimentary climate archives and thus help to…
View article: A comprehensive crosshole seismic experiment in glacial sediments at the ICDP DOVE site in the Tannwald Basin
A comprehensive crosshole seismic experiment in glacial sediments at the ICDP DOVE site in the Tannwald Basin Open
Glaciers have shaped the Alpine landscape by carving deep valleys and depositing sediments to form overdeepened basins. Understanding these processes provides information on the evolution of the climate and landscape. One such overdeepened…
View article: High-resolution crosshole seismic imaging of glacial sediments by full-waveform inversion
High-resolution crosshole seismic imaging of glacial sediments by full-waveform inversion Open
During the Quaternary, glaciers shaped the Alpine region by excavating deep valleys and refilling them with the sediments that they transported. One such overdeepened valley is the Tannwald Basin (ICDP site 5068_1), which was created by th…
View article: A novel seismic full waveform inversion approach for assessing the internal structure of a medieval sea dike
A novel seismic full waveform inversion approach for assessing the internal structure of a medieval sea dike Open
Coastal protection in the form of dike constructions has a long history at the German North Frisian coast dating back to the High Middle Ages. As the vast majority of the dikes built prior to the devastating storm surges of the Middle Ages…
View article: Testicular torsion, time is of the essence: a case for testicular preservation
Testicular torsion, time is of the essence: a case for testicular preservation Open
Testicular torsion around the spermatic cord causes arterial and venous occlusion, which can lead to swelling, ischemia, and eventually necrosis of the testicle. It is a urologic emergency that requires a time-dependent diagnosis to preven…
View article: Seismic full waveform inversion in archaeological prospecting
Seismic full waveform inversion in archaeological prospecting Open
Seismic full waveform inversion is introduced as novel high-resolution imaging tool in archaeological prospection. The full waveform inversion approach allows the high-resolution characterization of low-contrast sedimentary layers, high-co…
View article: First results from stratigraphic investigation of Chiselet tell (Romania) using seismic full waveform inversion
First results from stratigraphic investigation of Chiselet tell (Romania) using seismic full waveform inversion Open
In this paper we analyze the applicability of seismic full-waveform inversion (FWI) for investigation of tells, which are often characterized by heterogeneous and small-scale stratigraphy. Major aim is to identify location and shape of set…
View article: A Cyclic Multi-Stage Implementation of the Full-Waveform Inversion for the Identification of Anomalies in Dams
A Cyclic Multi-Stage Implementation of the Full-Waveform Inversion for the Identification of Anomalies in Dams Open
For the safe and efficient operation of dams, frequent monitoring and maintenance are required. These are usually expensive, time consuming, and cumbersome. To alleviate these issues, we propose applying a wave-based scheme for the locatio…
View article: Prehistoric chamber tombs or geological pitfall? A multimethod case study from Ancient Aigeira with a focus on seismic full‐waveform inversion
Prehistoric chamber tombs or geological pitfall? A multimethod case study from Ancient Aigeira with a focus on seismic full‐waveform inversion Open
We show an extensive multimethod geophysical study of focusing on some enigmatic subsurface structures found at Ancient Aigeira (N Peloponnes, Greece) that could be interpreted either as prehistoric chamber tombs or complex weathering patt…
View article: Using Seismic Full-Waveform Inversion (FWI) for Structural Investigation of the Danevirke
Using Seismic Full-Waveform Inversion (FWI) for Structural Investigation of the Danevirke Open
– Applicability of seismic FWI to archaeological targets with strong topography.– Reconstruction of building phases and state of preservation using seismic FWI.
View article: The Slab Puzzle of the Alpine‐Mediterranean Region: Insights From a New, High‐Resolution, Shear Wave Velocity Model of the Upper Mantle
The Slab Puzzle of the Alpine‐Mediterranean Region: Insights From a New, High‐Resolution, Shear Wave Velocity Model of the Upper Mantle Open
Mediterranean tectonics since the Lower Cretaceous has been characterized by a multiphase subduction and collision history with temporally and spatially variable, small‐scale plate configurations. A new shear wave velocity model of the Med…
View article: The Slab Puzzle of the Alpine-Mediterranean Region: Insights from a new, High-Resolution, Shear-Wave Velocity Model of the Upper Mantle
The Slab Puzzle of the Alpine-Mediterranean Region: Insights from a new, High-Resolution, Shear-Wave Velocity Model of the Upper Mantle Open
<p>The fascinatingly complex tectonic make-up of the Mediterranean region comprises small, strongly-curved retreating subduction zones, associated back-arc basins, and the continental collisions along the northern and eastern margins…
View article: Characterization of silty to fine‐sandy sediments with SH waves: full waveform inversion in comparison with other geophysical methods
Characterization of silty to fine‐sandy sediments with SH waves: full waveform inversion in comparison with other geophysical methods Open
We apply seismic full waveform inversion to SH‐ and Love‐wave data for investigating the near‐surface lithology at an archaeological site. We evaluate the resolution of the applied full waveform inversion algorithm through ground truthing …
View article: Seismic Velocity Uncertainties and their Effect on Geothermal Predictions: A Case Study
Seismic Velocity Uncertainties and their Effect on Geothermal Predictions: A Case Study Open
Geothermal exploration relies in large parts on subsurface models derived from seismic reflection profiling. Based on a case study of the Larderello area we discuss the influence of seismic velocity uncertainties in geothermal prospecting …
View article: Waveform inversion in triclinic anisotropic media—a resolution study
Waveform inversion in triclinic anisotropic media—a resolution study Open
Seismic full waveform inversion (FWI) has been applied to simple elastic problems with certain symmetries, such as isotropic, transverse isotropic or vertical transversely isotropic media. In this study, the FWI concept is extended to the …