Anke Dannowski
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View article: Calving-driven fjord dynamics resolved by seafloor fibre sensing
Calving-driven fjord dynamics resolved by seafloor fibre sensing Open
Interactions between melting ice and a warming ocean drive the present-day retreat of tidewater glaciers of Greenland 1–3 , with consequences for both sea level rise 4 and the global climate system 5 . Controlling glacier frontal ablation,…
View article: The Role of Salt Tectonics in the 2021 Central Adriatic Seismic Sequence
The Role of Salt Tectonics in the 2021 Central Adriatic Seismic Sequence Open
On 27 March 2021 a 3‐months lasting seismic sequence struck the Central Adriatic Basin that is part of the Adria plate, a relatively undeformed plate since recent times. Analyzing the waveform data acquired by the Italian and Croatian seis…
View article: Lessons learned from marine refraction seismic experiments in the Ligurian Sea
Lessons learned from marine refraction seismic experiments in the Ligurian Sea Open
Wide-angle refraction seismic experiments are generally executed along 2D profiles. In this study, we investigate the potential and limitations of using adjacent 2D wide-angle seismic profiles for 3D tomography. From this, we provide sugge…
View article: Seismic Structure and Tectonics of the North‐Central Chilean Subduction Zone Along the Copiapó Ridge From Amphibious Seismic Refraction Tomography and Local Seismicity
Seismic Structure and Tectonics of the North‐Central Chilean Subduction Zone Along the Copiapó Ridge From Amphibious Seismic Refraction Tomography and Local Seismicity Open
The Chilean margin is one of the Earth's tectonically most active plate boundaries, and yet, some of its segments are still underexplored. Here, we present amphibious data from the Copiapó region at ∼27°S located within the mature Atacama …
View article: From Symmetric Rifting to Asymmetric Spreading—Insights Into Back‐Arc Formation in the Central Mariana Trough
From Symmetric Rifting to Asymmetric Spreading—Insights Into Back‐Arc Formation in the Central Mariana Trough Open
The Mariana Trough is the youngest back‐arc basin in a series of basins and arcs that developed behind the Mariana subduction zone in the western Pacific. Active seafloor spreading is ongoing at a spreading axis close to the Mariana Arc, r…
View article: Do gravity data justify a rifted “Liguro-Provençal Basin”?
Do gravity data justify a rifted “Liguro-Provençal Basin”? Open
The geodynamic evolution of the Liguro-Provençal Basin and its crust and upper mantle structure remain debated, especially regarding the role of rifting in continental break-up and seafloor spreading. Our study incorporates updated dataset…
View article: Crustal and upper mantle 3-D <i>Vs</i> structure of the Pannonian region from joint earthquake and ambient noise Rayleigh wave tomography
Crustal and upper mantle 3-D <i>Vs</i> structure of the Pannonian region from joint earthquake and ambient noise Rayleigh wave tomography Open
SUMMARY The Pannonian Basin, situated in Central Europe, is surrounded by the Alpine, Carpathian and Dinaric orogens. To understand its tectonic characteristics and evolution, we determine a shear wave velocity model of its crust, mantle l…
View article: Tectonic Quiescence in Actively Extending Back‐Arc Regions
Tectonic Quiescence in Actively Extending Back‐Arc Regions Open
We analyzed refraction and reflection seismic data covering the Central Lau Spreading Center (CLSC) and the Tonga volcanic arc at 18°S in the Pacific Ocean to investigate tectonic inactivity in actively extending back‐arc systems. Our P‐wa…
View article: New constraints on the crustal structure and rifting processes of the Liguro-Proven&#231;al Basin, Western Mediterranean
New constraints on the crustal structure and rifting processes of the Liguro-Provençal Basin, Western Mediterranean Open
Geophysical data from the Liguro-Provençal Basin show prominent margin asymmetry but the nature of the crust, especially in the northeastern part of the basin, remains unclear. The basin formed at the junction of the northern Apennine…
View article: The First Network of Ocean Bottom Seismometers in the Red Sea to Investigate the Zabargad Fracture Zone
The First Network of Ocean Bottom Seismometers in the Red Sea to Investigate the Zabargad Fracture Zone Open
In the last decades, the slow-spreading Red Sea rift has been the objective of several geophysical investigations to study the extension of the oceanic crust, the thickness of the sedimentary cover, and the formation of transform faults. H…
View article: The role of salt tectonics in the occurrence of the 2021 Central Adriatic seismic sequence
The role of salt tectonics in the occurrence of the 2021 Central Adriatic seismic sequence Open
On 27 March 2021 a three-months lasting seismic sequence struck the Central Adriatic Basin, part of Adria that is considered a relatively undeformed plate since recent times. Analyzing the waveform data acquired by the Italian and Croatian…
View article: Bending-related faulting, hydration, and mantle serpentinization in the incoming Cocos Plate at Middle America Trench: Evidence from wide-angle seismic refraction data
Bending-related faulting, hydration, and mantle serpentinization in the incoming Cocos Plate at Middle America Trench: Evidence from wide-angle seismic refraction data Open
At subduction zones, the bending of incoming plates and associated extensional stresses resulted in strong fault activity in the crust and upper mantle. The severe fracturing of the subducting slab in the trench outer rise facilitates the …
View article: Structure and geometry of the Chilean subduction zone near Copiap&#243; (~27&#176;S) based on an amphibious seismic refraction experiment
Structure and geometry of the Chilean subduction zone near Copiapó (~27°S) based on an amphibious seismic refraction experiment Open
The subduction of the oceanic Nazca plate beneath the continental South American plate shapes the Chilean margin and is known to generate large megathrust earthquakes. Our study focuses on the region defined by the pre-collision and subduc…
View article: Insights into Asymmetric Back-Arc Basin Formation in the Mariana Trough at 17&#176;N from Traveltime Tomography
Insights into Asymmetric Back-Arc Basin Formation in the Mariana Trough at 17°N from Traveltime Tomography Open
The Mariana Trough is the youngest back-arc basin in a series of basins and arcs that developed behind the Izu-Bonin-Mariana subduction zone in the western Pacific. In addition to active seafloor spreading, the Mariana Trough also exhibits…
View article: Harnessing Modern 3D Gravity Analysis Techniques: A Study of the Ligurian Offshore Area
Harnessing Modern 3D Gravity Analysis Techniques: A Study of the Ligurian Offshore Area Open
This interdisciplinary study describes the integration of gravity field analysis, curvature techniques and various spatial applications. The data are based on land-based Free Air and Bouguer gravity data from the AlpArray Gravity Research …
View article: Seismic velocity structure of the 25 &#176;S OCC north of the Rodriguez Triple Junction at the Central Indian Ridge extracted from ocean bottom seismometer
Seismic velocity structure of the 25 °S OCC north of the Rodriguez Triple Junction at the Central Indian Ridge extracted from ocean bottom seismometer Open
Three tectonic plates meet at the Rodriguez Triple Junction in the Central Indian Ocean. The plates are separated by the Central Indian Ridge (CIR), the South-East Indian Ridge (SEIR) and the South-West Indian ridge (SWIR), which all show …
View article: Stress Constraints From Shear‐Wave Analysis in Shallow Sediments at an Actively Seeping Pockmark on the W‐Svalbard Margin
Stress Constraints From Shear‐Wave Analysis in Shallow Sediments at an Actively Seeping Pockmark on the W‐Svalbard Margin Open
Mechanisms related to sub‐seabed fluid flow processes are complex and inadequately understood. Petrophysical properties, availability of gases, topography, stress directions, and various geological parameters determine the location and int…
View article: Extension Dynamics of the Northern Fonualei Rift and Spreading Center and the Southern Mangatolu Triple Junction in the Lau Basin at 16°S
Extension Dynamics of the Northern Fonualei Rift and Spreading Center and the Southern Mangatolu Triple Junction in the Lau Basin at 16°S Open
Due to the complexity of 2D magnetic anomaly maps north of 18°S and the sparsity of seismic data, the tectonic evolution of the northern Lau Basin has not yet been unraveled. We use a multi‐method approach to reconstruct the formation of t…
View article: Enhancing FAIRness for OBS data within the eFAIRs project
Enhancing FAIRness for OBS data within the eFAIRs project Open
Data from Ocean Bottom Seismometer (OBS) deployments nowadays are routinely integrated in federated seismological data centers, but often without following standardized procedures as recommended by the OBS community. This makes it difficul…
View article: Site survey for potential MoHole drilling sites in the Guatemala Basin
Site survey for potential MoHole drilling sites in the Guatemala Basin Open
A founding ambition of scientific ocean drilling is to drill a MoHole that penetrates the entire ocean crust and into the upper mantle at a location representative of normal crustal accretion and evolution. This remains the only way to tes…
View article: Oceanic crustal structure at ODP Site 1256 from seismic wide-angle tomography and down-hole logging
Oceanic crustal structure at ODP Site 1256 from seismic wide-angle tomography and down-hole logging Open
Our view on the structure of oceanic crust is largely based the interpretation of seismic refraction and wide-angle experiments, revealing that the upper basaltic crust (layer 2) is a region of strong velocity gradients. In contrast, the l…
View article: The AlpArray Research Seismicity-Catalogue
The AlpArray Research Seismicity-Catalogue Open
Summary We take advantage of the new large AlpArray Seismic Network (AASN) as part of the AlpArray research initiative (www.alparray.ethz.ch), to establish a consistent seismicity-catalogue for the greater Alpine region (GAR) for the time …
View article: Tectonic activity at Mangatolu Triple Junction and the Fonualei Rift and Spreading Center: breaking apart the intra-oceanic Niuafo&#8217;ou-Tonga microplate, Lau Basin, South West Pacific Ocean
Tectonic activity at Mangatolu Triple Junction and the Fonualei Rift and Spreading Center: breaking apart the intra-oceanic Niuafo’ou-Tonga microplate, Lau Basin, South West Pacific Ocean Open
<p> The Mangatolu Triple Junction (MTJ) and the Fonualei Rift and Spreading Center (FRSC) are two prominent bathymetric features in the northern Lau Basin in the southwest Pacific Ocean. We present the results of six W-E run…
View article: Crustal evolution and oceanic core complexes at the Ascension fracture zone &#8211; MAR 7&#176; S
Crustal evolution and oceanic core complexes at the Ascension fracture zone – MAR 7° S Open
<p>The Ascension fracture zone (AFZ) is a double transform fault system and offsets the Mid-Atlantic Ridge axis by 230 km at 7 °S. The transform fault system is consisting of two parallel transform faults, the North and Sout…
View article: 3D crustal structure of the Ligurian Basin revealed by surface wave tomography using ocean bottom seismometer data
3D crustal structure of the Ligurian Basin revealed by surface wave tomography using ocean bottom seismometer data Open
The Liguro-Provençal basin was formed as a back-arc basin of the retreating Calabrian–Apennines subduction zone during the Oligocene and Miocene. The resulting rotation of the Corsica–Sardinia block is associated with rifting, shaping the …
View article: Basin inversion: reactivated rift structures in the central Ligurian Sea revealed using ocean bottom seismometers
Basin inversion: reactivated rift structures in the central Ligurian Sea revealed using ocean bottom seismometers Open
The northern margin of the Ligurian Basin shows notable seismicity at the Alpine front, including frequent magnitude 4 events. Seismicity decreases offshore towards the Basin centre and Corsica, revealing a diffuse distribution of low-magn…
View article: Seismic imaging of an active fluid conduit below Scanner Pockmark, Central North Sea
Seismic imaging of an active fluid conduit below Scanner Pockmark, Central North Sea Open
Highlights
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\n• Unprecedented dense coverage of ocean-bottom seismometer data reveals seismic velocity variations within a vertical fluid pathway.
\n• There are zones of both positive (faster) and negative (slower) velocity within the fl…
View article: Shear wave splitting in the Alpine region
Shear wave splitting in the Alpine region Open
SUMMARY To constrain seismic anisotropy under and around the Alps in Europe, we study SKS shear wave splitting from the region densely covered by the AlpArray seismic network. We apply a technique based on measuring the splitting intensity…
View article: Comment on se-2021-55
Comment on se-2021-55 Open
Abstract. The Liguro-Provençal basin was formed as a back-arc basin of the retreating CalabrianâApennines subduction zone during the Oligocene and Miocene. The resulting rotation of the CorsicaâSardinia block is assoc…
View article: Reply on RC1
Reply on RC1 Open
Abstract. The northern margin of the Ligurian Basin shows notable seismicity at the Alpine front, including frequent magnitude 4Â events. Seismicity decreases offshore towards the Basin centre and Corsica, revealing a diff…