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8 results on '"Petersen, Florian"'

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

Author

Gutscher, Marc-Andre, primary, Royer, Jean-Yves, additional, Graindorge, David, additional, Murphy, Shane, additional, Klingelhoefer, Frauke, additional, Gaillot, Arnaud, additional, Aiken, Chastity, additional, Cattaneo, Antonio, additional, Barreca, Giovanni, additional, Quetel, Lionel, additional, Riccobene, Giorgio, additional, Aurnia, Salvatore, additional, Margheriti, Lucia, additional, Moretti, Milena, additional, Krastel, Sebastian, additional, Petersen, Florian, additional, Urlaub, Morelia, additional, Kopp, Heidrun, additional, Currenti, Gilda, additional, and Jousset, Philippe, additional

Published
2022
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4. Repeated mapping and geological sampling of Mt Etna’s submerged continental margin: First results from RV Meteor expedition M178

Author

Gross, Felix, primary, Kolling, Henriette, additional, Barrett, Rachel, additional, Hadré, Emma, additional, Heinrich, Mirja, additional, Bonforte, Alessandro, additional, Gambino, Salvatore, additional, Petersen, Florian, additional, Morgenweck, Lea, additional, Matzerath, Peter, additional, Wolf, Josephin, additional, Heinrich, Sven, additional, Vollert, Jannes, additional, Hundsdörfer, Marie, additional, Filbrandt, Christian, additional, and Urlaub, Morelia, additional

Published
2022
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6. Basin inversion: reactivated rift structures in the central Ligurian Sea revealed using ocean bottom seismometers

Author

Thorwart, Martin, Dannowski, Anke, Grevemeyer, Ingo, Lange, Dietrich, Kopp, Heidrun, Petersen, Florian, Crawford, Wayne, Paul, Anne, The Alparray Working Group, Thorwart, Martin, Dannowski, Anke, Grevemeyer, Ingo, Lange, Dietrich, Kopp, Heidrun, Petersen, Florian, Crawford, Wayne, Paul, Anne, and The Alparray Working Group

Abstract

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 seismic network with focus on the offshore component, the AlpArray OBS network, consisting of 24 broadband ocean bottom seismometers deployed for eight months, to reveal the seismicity and depth distribution of micro-earthquakes beneath the Ligurian Sea. Two clusters occurred between ~10 km to ~16 km depth below sea surface, within the lower crust and uppermost mantle. Thrust faulting focal mechanisms indicate compression and an inversion of the Ligurian Basin, which is an abandoned Oligocene rift basin. The Basin inversion is suggested to be related to the Africa-Europe plate convergence. The locations and focal mechanisms of seismicity suggest reactivation of pre-existing rift structures. Slightly different striking directions of faults in the basin centre compared to faults further east and hence away from the abandoned rift may mimic the counter-clockwise rotation of the Corsica-Sardinia block during ~20–16 Ma. The observed cluster events support the hypothesis of strengthening of crust and uppermost mantle during rifting related extension and thinning of continental crust.

Published
2021
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8. Patterns of seafloor morphology as a response to tectonic- and sedimentary processes south of the Messina Strait, Italy

Author

Gross, Felix, Klein, Elisa, Urlaub, Morelia, Micallef, Aaron, Schulze, Inken, Laengner, Marieke, Krabbenhoeft, Anne, Geersen, Jacob, Gutscher, Marc-André, Hannemann, Katrin, Petersen, Florian, Fu, Lili, and Krastel, Sebastian

Subjects
Continental margins -- Italy -- Sicily, Seismology -- Italy -- Sicily, Earthquakes -- Italy -- Sicily, Seismic reflection method -- Italy -- Sicily, Geodynamics -- Italy -- Sicily
Abstract

The Ionian Sea between Sicily and Calabria is known for its complex geological setting, as it is located at the convergence zone of the African and Eurasian plates. The seismogenic potential in this region is manifested by several high magnitude and disastrous earthquakes like the 1908 Messina Earthquake. Furthermore, the area is affected by intense volcanism like the Aeolian Island volcanos in the Tyrrhenian Sea and Europe’s largest active volcano, Mt Etna, sitting directly at the eastern coast of Sicily. During the last years, the possible presence of Subduction Tear Edge Propagator faults (STEP-faults) has been heavily debated. The main candidates for these faults are the Ionian Fault in the Northeast and the Alfeo-Etna Fault in the Southwest of the working area between Sicily and Calabria. Nevertheless, only little is known about near seafloor deformation zones and sedimentary processes in the Ionian Sea directly south of the Messina Strait., peer-reviewed

Published
2017

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