Published May 13, 2025
| Version v1
Dataset
Open
Earthquake Locations in the Etna Volcano using a 3D velocity model during 2005-2024 (EtnaEQ3D_2005-2024)
- 1. Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Contributors
Rights holder:
Supervisor:
- 1. Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Description
This catalogue presents the seismicity recorded in the Etna volcano area by the INGV-OE seismic network between 01 January 2005 and 31 December 2024. During this period, local magnitudes (ML) ranged from 0.1 to 4.8. Events were selected with at least six observations, root-mean-square time residuals (RMS) ≤ 0.50 s at the stations, and horizontal (ERH) and vertical (ERZ) location uncertainties ≤ 5.0 km.
Methods (English)
The earthquake dataset was relocated using the tomoDDPS algorithm (Zhang et al., 2009), applying a three-dimensional velocity model developed through the integration of both passive and active seismic data (Firetto Carlino et al., 2022), in order to enhance the precision of hypocentral determinations. Earthquakes' initial parameters were derived from Alparone et al. (2015, 2020a, 2020b, 2022) and Barberi et al. (2020). The tomoDDPS benefits from combining absolute travel times with differential arrival-time measurements between pairs of nearby seismic events, which follow nearly identical propagation paths to a common station. As these paths are essentially the same, any variation in arrival times can be reliably linked to the relative positions of the events in space. The application of 3D relocation led to a more defined clustering of seismicity and produced a reduction in travel-time residuals between observed and computed data by about 37%, with a mean residual of 0.014 seconds. The final hypocentral locations show horizontal and vertical uncertainties of less than 0.8 km. The hypocenters of 474 events were located above sea level, very close to the topographic surface. Since their depth could not be reliably constrained, we fixed them at the topographic elevation—which falls within the depth uncertainty range—and marked these in the notes field.Technical info (English)
The table (EtnaEQ3D_2005-2024) shows the origin time and the hypocentre parameters of locations. Specifically: ID= identification number; Date (day- month-year); Origin Time (hour, minute, second and cent); Lat = latitude north in degrees; Long = longitude east in degrees; Depth in km; ML= local magnitude; Notes=depth fixed at the topographic elevation.Files
Files
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Additional details
Dates
- Collected
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2005-01-01/2024-12-31
- Valid
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2005-01-01/2024-12-31