Published 2025
| Version v1
Dataset
Open
Earthquake Locations in southern Tyrrhenian Sea and northern Sicily using a 3D velocity model between 1 January 2000 and 31 August 2021 (STyrr_EQ3D_2000-2021)
Creators
- 1. Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Contributors
Rights holder:
Supervisor:
- 1. Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Description
We computed new 3D locations for 8003 earthquakes (0.6≤M≤5.6) that occurred in the southern Tyrrhenian Sea and northern Sicily between 1 January 2000 and 31 August 2021. The events were recorded by the land seismic network managed by the INGV and a seafloor network, consisting of 14 Ocean Bottom Seismometers and Hydrophones, deployed during the Tyrrhenian Deep sea Experiment (TYDE, December 2000 – May 2001; Dahm et al., 2002; Sgroi et al., 2006) and the NEMO-SN1 seafloor observatory (October 2002 – February 2003; June 2012 - June 2013; Sgroi et al. 2021).
Methods (English)
We collected basic data (travel times) from available datasets (ISIDe Working Group, 2007) and published studies (Sgroi et al., 2006; Barberi et al., 2006; Monna et al., 2013) and processed them using the 3D velocity model of Scarfì et al. (2018) and the tomoDDPS algorithm (Zhang et al., 2009). This software has the advantage of using a combination of both absolute and differential arrival times, so that for earthquakes with closely spaced foci, travel times errors due to inaccurate velocity models in the volume outside the cluster will essentially be cancelled. Furthermore, for 116 events, magnitude values were not available because they were located only using the seafloor network. We assigned them the value 999 and added the note "magnitude not available" in the notes field.Technical info (English)
The table (STyrr_EQ3D_2000-2021) shows the origin time and the hypocentre parameters of locations. Specifically: ID = identification number; Date (year/month/day); O.T. = Origin Time (hour, minute, second and cent); Lat = latitude north in degrees; Long = longitude east in degrees; Depth in km; MagType = duration (Md), local (ML) or moment magnitude (Mw); Magnitude; Notes = magnitude not available.Files
Files
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Additional details
Dates
- Collected
-
2000-01-01/2021-08-31
- Valid
-
2000-01-01/2021-08-31