Reply to Comment by A. Argnani on “Geometry of the Deep Calabrian Subduction From Wide‐Angle Seismic Data and 3‐D Gravity Modeling”

Andrea Argnani in his comment on Dellong et al. (2020, https://doi.org/10.1029/2019gc008586) (Geometry of the deep Calabrian subduction (Central Mediterranean Sea) from wide‐angle seismic data and 3‐D gravity modeling) proposes an alternate interpretation of the wide‐angle seismic velocity models presented by Dellong et al. (2018, https://doi.org/10.1002/2017JB015312) and Dellong et al. (2020) and proposes a correction of the literature citations in these paper. In this reply, we discuss in detail all points raised by Andrea Argnani.

Argnani, A. (2020). Comment on “Geometry of the deep Calabrian subduction (Central Mediterranean Sea) from wideangle seismic data
and 3‐D gravity modeling” by Dellong Et Al. Geochemistry, Geophysics, Geosystems. https://doi.org/10.1029/2020gc009077
Argnani, A., & Bonazzi, C. (2005). Malta Escarpment fault zone offshore eastern Sicily: Plio‐Quaternary tectonic evolution based on new
multi-channel seismic data. Tectonics, 24, TC4009. https://doi.org/10.1029/2004TC001656
Barreca, G., Scarfì, L., Gross, F., Monaco, C., & De Guidi, G. (2019). Fault pattern and seismotectonic potential at the south‐western edge of
the Ionian Subduction system (southern Italy): New field and geophysical constraints. Tectonophysics, 761, 31–45. https://doi.org/
10.1016/j.tecto.2019.04.020
Cernobori, L., Hirn, A., McBride, J. H., Nicolich, R., Petronio, L., & Romanelli, M. (1996). Crustal image of the Ionian basin and its
Calabrian margins. Tectonophysics, 264(1–4), 175–189. https://doi.org/10.1016/S0040-1951(96)00125-4
Dellong, D., Klingelhoefer F., Dannowski A., Kopp H., Murphy S., Graindorge D., et al. (2020). Geometry of the deep Calabrian subduction
(Central Mediterranean Sea) from wide‐angle seismic data and 3‐D gravity modeling. Geochemistry, Geophysics, Geosystems, 21(3),
https://doi.org/10.1029/2019gc008586
Cifelli, F., Rossetti, F., Mattei, M., Hirt, A. M., Funiciello, R., & Tortorici, L. (2004). An AMS, structural and paleomagnetic study of quaternary
deformation in eastern Sicily. Journal of Structural Geology, 26(1), 29–46. https://doi.org/10.1016/S0191-8141(03)00092-0
Dellong, D. (2018). Active faulting and deep crustal structure of the Eastern Sicily Margin (Doctoral dissertation). Université de Bretagne
Occidentale.
Dellong, D., Klingelhoefer, F., Kopp, H., Graindorge, D., Margheriti, L., Moretti, M., et al. (2018). Crustal structure of the Ionian Basin and
eastern Sicily margin: Results from a wide‐angle seismic survey. Journal of Geophysical Research: Solid Earth, 123, 2090–2114. https://
doi.org/10.1002/2017JB015312
Gallais, F., Graindorge, D., Gutscher, M. A., & Klaeschen, D. (2013). Propagation of a lithospheric tear fault (STEP) through the western
boundary of the Calabrian accretionary wedge offshore eastern Sicily (southern Italy). Tectonophysics, 602, 141–152. https://doi.org/
10.1016/j.tecto.2012.12.026
Govers, R., & Wortel M. J. R. (2005). Lithosphere tearing at STEP faults: Response to edges of subduction zones. Earth and Planetary Science
Letters, 236(1‐2), 505–523. https://doi.org/10.1016/j.epsl.2005.03.022
Gutscher, M.‐A., Dominguez, S., Mercier de Lepinay, B., Pinheiro, L., Gallais, F., Babonneau, N., et al. (2016). Tectonic expression of an
active slab tear from high‐resolution seismic and bathymetric data offshore Sicily (Ionian Sea). Tectonics, 35, 39–54. https://doi.org/
10.1002/2015TC003898
Gutscher, M.‐A., Kopp, H., Krastel, S., Bohrmann, G., Garlan, T., Zaragosi, S., et al. (2017). Active tectonics of the Calabrian subduction
revealed by new multi‐beam bathymetric data and high resolution seismic profiles in the Ionian Sea (Central Mediterranean). Earth and
Planetary Science Letters, 461, 61–72. https://doi.org/10.1016/j.epsl.2016.12.020
Maesano, F. E., Tiberti, M. M., & Basili, R. (2017). The Calabrian Arc: Three‐dimensional modeling of the subduction interface. Scientific
Reports, 7, 8887. https://doi.org/10.1038/s41598-017-09074-8
Maesano, F. E., Tiberti, M. M., & Basili, R. (2020). Deformation and fault propagation at the lateral termination of a subduction zone: The
Alfeo fault system in the Calabrian Arc, Southern Italy. Frontiers in Earth Science, 8, 107. https://doi.org/10.3389/feart.2020.00107
Nicolich, R., Laigle, M., Hirn, A., Cernobori, L., & Gallart, J. (2000). Crustal structure of the Ionian margin of Sicily: Etna volcano in the
frame of regional evolution. Tectonophysics, 329(1–4), 121–139. https://doi.org/10.1016/S0040-1951(00)00192-X
Palano, M., Ferranti, L., Monaco, C., Mattia, M., Aloisi, M., Bruno, V., et al. (2012). GPS velocity and strain fields in Sicily and southern
Calabria, Italy: Updated geodetic constraints on tectonic block interaction in the central Mediterranean. Journal of Geophysical Research,
117, B07401. https://doi.org/10.1029/2012JB009254
Polonia, A., Nelson, C. H., Romano, S., Vaiani, S. C., Colizza, E., Gasparotto, G., & Gasperini, L. (2017). A depositional model for
seismo‐turbidites in confined basins based on Ionian Sea deposits. Marine Geology, 384, 177–198. https://doi.org/10.1016/j.
margeo.2016.05.010
Polonia, A., Torelli, L., Artoni, A., Carlini, M., Faccenna, C., Ferranti, L., et al. (2016). The Ionian and Alfeo‐Etna fault zones: New segments
of an evolving plate boundary in the central Mediterranean Sea? Tectonophysics, 675, 69–90. https://doi.org/10.1016/j.tecto.2016.03.016
Polonia, A., Torelli, L., Mussoni, P., Gasperini, L., Artoni, A., & Klaeschen, D. (2011). The Calabrian Arc subduction complex in the Ionian
Sea: Regional architecture, active deformation, and seismic hazard. Tectonics, 30, TC5018. https://doi.org/10.1029/2010TC002821
Torelli, L., Grasso, M., Mazzoldi, G., & Peis, D. (1998). Plio‐Quaternary tectonic evolution and structure of the Catania foredeep, the
northern Hyblean Plateau and the Ionian shelf (SE Sicily). Tectonophysics, 298(1–3), 209–221. https://doi.org/10.1016/S0040-
1951(98)00185-1
Ventura, B. M., Serpelloni, E., Argnani, A., Bonforte, A., Bürgmann, R., Anzidei, M., et al. (2014). Fast geodetic strain‐rates in eastern Sicily
(southern Italy): New insights into block tectonics and seismic potential in the area of the great 1693 earthquake. Earth and Planetary
Science Letters, 404, 77–88. https://doi.org/10.1016/j.epsl.2014.07.025

Reply to Argnani, A. (2020). Comment on“Geometry of the deep Calabriansubduction (Central MediterraneanSea) from wide-angle seismic data and3-D gravity modeling” by Dellong et al.Geochemistry, Geophysics, Geosyste ms,21, e2020GC009077, https://doi.org/10.1029/2020GC009077