Radially Anisotropic 3D Velocity Model of the Central Apennines Lithosphere: The C I 23 $C{I}_{23}$ Model

IF 4.6 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Geophysical Research Letters Pub Date : 2025-02-03 DOI:10.1029/2024GL111333

Angela Stallone, Lion Krischer, Federica Magnoni, Emanuele Casarotti, Paola Baccheschi, Andreas Fichtner

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引用次数: 0

Abstract

We present the first application of Full-Waveform Inversion (FWI) for a radially anisotropic 3D velocity model of the lithosphere beneath central Italy. The retrieved model $C I_{23}$ constrains P-wave ( $V_{P V}$ , $V_{P H}$ ) and S-wave velocities ( $V_{S V}$ , $V_{S H}$ ) in the period range 8–50 s. $C I_{23}$ model correlates well with regional lithological formations and highlights a negative radial anisotropy anomaly $(V_{S H} < V_{S V})$ localized beneath the epicentral region of the 2016–2017 Amatrice-Visso-Norcia (AVN) seismic sequence. An opposite trend (positive radial anisotropy anomaly, i.e. $V_{S H} > V_{S V}$ ) is observed in the area affected by the 2009 L’Aquila (AQ) seismic sequence. We interpret the velocity anomalies in terms of local tectonic structures, particularly the Olevano-Antrodoco-Sibillini (OAS) thrust—Gran Sasso Thrust (GST) systems, while also considering possible evidence of overpressured fluids and fluid migration. Additionally, the observed anomalies may reflect transient velocity variations induced by the ANV and AQ seismic sequences.

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来源期刊

Geophysical Research Letters 地学-地球科学综合

CiteScore

9.00

自引率

9.60%

发文量

1588

审稿时长

2.2 months

期刊介绍： Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.