Florian Petersen

Megathrust reflectivity reveals the updip limit of the 2014 Iquique earthquake rupture

Bo Ma, Jacob Geersen, Dietrich Lange, Dirk Klaeschen et autres

The updip limit of seismic rupture during a megathrust earthquake exerts a major control on the size of the resulting tsunami. Offshore Northern Chile, the 2014 Mw 8.1 Iquique earthquake ruptured the plate boundary between 19.5° and 21°S. Rupture terminated under the …

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The AlpArray Research Seismicity-Catalogue

Matteo Bagagli, Irene Molinari, Tobias Diehl, Edi Kissling et autres

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 period 2016 January 1–2019 December 31. We use …

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In-situ monitoring of strain on the seafloor: an overview and results of the GeoSEA projects

Heidrun Kopp, Dietrich Lange, Morelia Urlaub, Florian Petersen et autres

The ocean floor is the outer solid shell for over 70% of our planet, which is continuously moved and deformed in the course of global plate tectonics. These processes lead to tectonic stresses building up in the seafloor, which over long periods …

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How to detect slow slip and long-term seafloor deformation? Lessons from two acoustic ranging campaigns on the submerged flank of Mt Etna

Florian Petersen, Morelia Urlaub, Felix Groß, Alessandro Bonforte et autres

The Earth’s ocean floor deforms continuously under the influence of tectonic and non-tectonic processes. In the recent decade, the installation of seafloor geodetic instruments to accurately monitor fault displacement and strain accumulation has greatly improved our understanding of seafloor deformation and our …

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Repeated mapping and geological sampling of Mt Etna’s submerged continental margin: First results from RV Meteor expedition M178

Felix Groß, Henriette Kolling, Rachel Barrett, Emma Hadré et autres

Mt Etna, Europe’s largest active volcano, is located directly on the Sicilian coastline of the Ionian Sea. In addition to frequent Strombolian eruptions, Etna’s south-eastern flank is currently sliding seawards at a rate of several centimetres per year. Over the past decade, …

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Monitoring a submarine strike-slip fault, using a fiber optic strain cable

Marc‐André Gutscher, Jean‐Yves Royer, David Graindorge, S. M. Murphy et autres

The goal of the ERC (European Research Council) funded project - FOCUS is to apply laser reflectometry on submarine fiber optic cables to detect deformation at the seafloor in real time using BOTDR (Brillouin Optical Time Domain Reflectometry). This technique is commonly …

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Flank instability at Mount Etna: new insights from seafloor deformation monitoring

Morelia Urlaub, Florian Petersen, Alessandro Bonforte, Felix Groß et autres

Coastal and ocean island volcanoes are renowned for having unstable flanks, which expresses as slow seawards flank sliding observable by geodetic techniques and/or catastrophic sector collapses. A large section of these unstable flanks is often below sea level, where information on the …

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The Submarine Boundaries of Mount Etna’s Unstable Southeastern Flank

Morelia Urlaub, Jacob Geersen, Florian Petersen, Felix Groß et autres

Coastal and ocean island volcanoes are renowned for having unstable flanks. This can lead to flank deformation on a variety of temporal and spatial scales ranging from slow creep to catastrophic sector collapse. A large section of these unstable flanks is often …

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Petersen Preis: herausragende Doktorarbeit

Florian Petersen

„Analysis of seismic and aseismic deformation using shoreline-crossing observations” (Analyse seismischer und a-seismischer Verformungen anhand von Beobachtungen über die Küstenlinie hinweg)

Basin inversion: reactivated rift structures in the central Ligurian Sea revealed using ocean bottom seismometers

Martin Thorwart, Anke Dannowski, Ingo Grevemeyer, Dietrich Lange et autres

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-magnitude earthquakes. We analyse data of the amphibious AlpArray …

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Relationship Between Subduction Erosion and the Up‐Dip Limit of the 2014 Mw 8.1 Iquique Earthquake

Florian Petersen, Dietrich Lange, Bo Ma, Ingo Grevemeyer et autres

Abstract The aftershock distribution of the 2014 Mw 8.1 Iquique earthquake offshore northern Chile, identified from a long‐term deployment of ocean bottom seismometers installed eight months after the mainshock, in conjunction with seismic reflection imaging, provides insights into the processes regulating the …

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Local seismicity indicates basin inversion in the Ligurian Sea

Martin Thorwart, Anke Dannowski, Ingo Grevemeyer, Dietrich Lange et autres

International audience

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