2026-10-11T06:29:14Z https://oai.datacite.org/oai

doi:10.13127/wisefm/1990-2019 2026-04-09T06:57:07Z WNGN CRUI.INGV

4 CRUI.INGV 10.13127/WISEFM/1990-2019 Barberi, Graziella Graziella Barberi https://orcid.org/0000-0002-8273-0458 Istituto Nazionale di Geofisica e Vulcanologia (INGV) Sgroi, Tiziana Tiziana Sgroi https://orcid.org/0000-0001-7030-0699 Istituto Nazionale di Geofisica e Vulcanologia (INGV) Marchetti, Alessandro Alessandro Marchetti https://orcid.org/0000-0002-9978-2369 Istituto Nazionale di Geofisica e Vulcanologia (INGV) Istituto Nazionale di Geofisica e Vulcanologia (INGV) 2024 Focal solutions of earthquakes recorded in the Western Ionian Sea between 1990 and 2019. Western Ionian Sea Land and seafloor seismic stations Focal mechanisms Istituto Nazionale di Geofisica e Vulcanologia (INGV) https://ror.org/00qps9a02 1990/2019 1990/2019 2024 2024 2024 10.13127/iside 10.3133/ofr85739 10.1038/s41598-020-79719-8 10.4401/ag-8575 10.3389/feart.2021.661311 10.1029/2009gc002709 10.1038/s41597-026-06979-w https://data.ingv.it/metadata/iso19115/10.13127/wisefm/1990-2019.xml 70 KB application/vnd.openxmlformats-officedocument.spreadsheetml.sheet Open Access Creative Commons Attribution 4.0 International We computed new 421 focal solutions (1.5≤ML≤4.7), with rays traced through the 3D velocity model of Sgroi et al. 2021 (https://doi.org/10.1038/s41598-020-79719-8), of events occurred in the western Ionian Sea in the period between 1990 and 2019. Earthquakes were recorded by the land seismic network managed by the INGV and by a seafloor network, comprising the NEMO-SN1 seafloor observatory (October 2002 – February 2003; June 2012 - June 2013) and 7 Ocean Bottom Seismometers (OBS) deployed during the SEISMOFAULTS experiment (April 2017 – April 2018). Abbiamo calcolato 421 nuove soluzioni focali (1.5≤ML≤4.7), con raggi tracciati attraverso il modello di velocità 3D di Sgroi et al. 2021 (https://doi.org/10.1038/s41598-020-79719-8), degli eventi avvenuti nel Mar Ionio occidentale nel periodo compreso tra il 1990 e il 2019. I terremoti sono stati registrati dalla rete sismica terrestre gestita dall'INGV e da una rete sottomarina, comprendente l'osservatorio multiparametrico NEMO-SN1 (ottobre 2002 – febbraio 2003; giugno 2012 - giugno 2013) e 7 sismometri da fondo oceanico (OBS) dispiegati durante l'esperimento SEISMOFAULTS (aprile 2017 – aprile 2018). We collected basic data (travel times) from available datasets (ISIDe Working Group, 2007) and published studies (Sgroi et al., 2021) and processed them using the tomoDDPS algorithm (Zhang et al., 2009) and the 3D velocity model of Sgroi et al. (2021, https://doi.org/10.1038/s41598-020-79719-8). By using FPFIT software (Reasenberg and Oppenheimer, 1985), we obtained 421 focal solutions with an average uncertainty on the orientation of the nodal planes of about 10°. These focal mechanisms can be considered representative of the kinematics characterising the western Ionian Sea and the eastern Sicily and south Calabria coasts, since they are distributed in all the main seismogenically active areas of the region. The table (WISeFM_1990-2019) shows focal parameters of the analysed earthquakes. Specifically: ID = identification number; DATE (year-month-day); Origin Time (hour, minute, second and cent); LAT = latitude north in degrees; LONG = longitude east in degrees; DEPTH in km; ML= magnitude; N = number of polarities; PLANE 1 (STRK, DIP, RAKE), PLANE 2 (STRK, DIP, RAKE) = strike, dip and rake of the first and the second nodal plane; P-AXIS (STRK, DIP), T-AXIS (STRK, DIP) = strike and dip of the P- and T-axes; Q = quality of the focal mechanism (2 = best quality; 1 = medium quality; 0 = low quality); CAT = category (NF = normal fault, NS = normal-strike, SS = strike-slip, TF = thrust fault, TS = thrust-strike, HV = horizontal-vertical). Western Ionian Sea Western Ionian Sea 14.5 18 35.7 38.5