Seismic attenuation, controlled by scattering and intrinsic absorption, provides important constraints on crustal heterogeneity, fracturing and fluid distribution. This study presents 3D attenuation tomography of the Calabrian Arc using a relocated dataset of approximately 490 local earthquakes recorded between 2016 and 2024 by local and national seismic networks. P- and S-wave arrivals were manually picked and the events relocated to obtain a robust dataset for attenuation analysis. Using the MuRAT3D framework, seismic scattering is investigated through Peak Delay, while total and intrinsic attenuation are characterized through Q and Qc. The analysis was performed at multiple frequencies (1.5, 3, 6, 12 and 18 Hz). The resulting 3D models show laterally variable attenuation patterns, with marked contrasts between continental and offshore sectors and localized anomalies related to crustal heterogeneity and possible interactions with deeper structures.
Multi-parameter seismic attenuation tomography of the Calabrian crust (Italy) using MuRAT3D
Caporale, Gaia;de Nardis, Rita;
2026-01-01
Abstract
Seismic attenuation, controlled by scattering and intrinsic absorption, provides important constraints on crustal heterogeneity, fracturing and fluid distribution. This study presents 3D attenuation tomography of the Calabrian Arc using a relocated dataset of approximately 490 local earthquakes recorded between 2016 and 2024 by local and national seismic networks. P- and S-wave arrivals were manually picked and the events relocated to obtain a robust dataset for attenuation analysis. Using the MuRAT3D framework, seismic scattering is investigated through Peak Delay, while total and intrinsic attenuation are characterized through Q and Qc. The analysis was performed at multiple frequencies (1.5, 3, 6, 12 and 18 Hz). The resulting 3D models show laterally variable attenuation patterns, with marked contrasts between continental and offshore sectors and localized anomalies related to crustal heterogeneity and possible interactions with deeper structures.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
