Real-Time Determination of Seismic Moment Tensor for the Italian Region

Scognamiglio, Laura; Tinti, Elisa; Michelini, Alberto

doi:10.1785/0120080104

Cited by 133 publications

(116 citation statements)

References 31 publications

Supporting

Mentioning

112

Contrasting

Order By: Relevance

“…Earthquakes occurred during the time covered by our SAR data, as reported in the INGV (National Institute of Geophysics and Volcanology) catalogue (ISIDe working group 2016; Figure 2). Focal mechanisms of recent earthquakes ( Figure 2; [25][26][27]) agree with the extensional tectonics attributed by several authors to this sector of the northern Calabrian Arc (e.g., [24,28]). An extensional trend along the east-west (E-W) axis is also shown by permanent GNSS (Global Navigation Satellite Systems) stations [29].…”

Section: Geological Settingsupporting

confidence: 87%

Landslides and Subsidence Assessment in the Crati Valley (Southern Italy) Using InSAR Data

et al. 2018

View full text Add to dashboard Cite

Abstract:In this work, we map surficial ground deformations that occurred during the years 2004-2010 in the Crati Valley (Southern Italy). The valley is in one of the most seismically active regions of the Italian peninsula, and presents slope instability and widespread landslide phenomena. We measured ground deformations by applying the small baseline subset (SBAS) technique, a multi-temporal synthetic aperture radar interferometry (InSAR) methodology that is used to process datasets of synthetic aperture radar (SAR) images. Ground displacements are only partially visible with the InSAR technique. Visibility depends on the geometry of the acquisition layout, such as the radar acquisition angle view, and the land use. These two factors determine the backscattering of the reflected signal. Most of the ground deformation detected by InSAR can be attributed to the gravitational mass movements of the hillslopes (i.e., landslides), and the subsidence of the quaternary deposits filling the valley. The movements observed along the valley slopes were compared with the available landslide catalog. We also identified another cause of movement in this area, i.e., ground subsidence due to the compaction of the quaternary deposits filling the valley. This compaction can be ascribed to various sources, such as urban population growth and sprawl, industrial water withdrawal, and tectonic activity.

show abstract

Section: Geological Settingsupporting

confidence: 87%

Landslides and Subsidence Assessment in the Crati Valley (Southern Italy) Using InSAR Data

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Green dashed lines represent the observed surface breaks after the 24 August event [EMERGEO Working Group, 2016]. Seismicity: orange dots are relocated aftershocks [Chiaraluce et al, 2017]; red stars represent the three largest shocks (moment tensor solutions from Scognamiglio et al [2009]), while the white stars are M w > 5 earthquakes. Previous events: purple stars show the location of historical earthquakes [Rovida et al, 2011]; yellow stars show the major instrumental events [Castello et al, 2006] (ISIDe: http://iside.rm.ingv.it).…”

Section: Insar Datamentioning

confidence: 99%

Geodetic model of the 2016 Central Italy earthquake sequence inferred from InSAR and GPS data

Cheloni

Novellis

Albano

et al. 2017

Geophysical Research Letters

174

257

View full text Add to dashboard Cite

We investigate a large geodetic data set of interferometric synthetic aperture radar (InSAR) and GPS measurements to determine the source parameters for the three main shocks of the 2016 Central Italy earthquake sequence on 24 August and 26 and 30 October (Mw 6.1, 5.9, and 6.5, respectively). Our preferred model is consistent with the activation of four main coseismic asperities belonging to the SW dipping normal fault system associated with the Mount Gorzano‐Mount Vettore‐Mount Bove alignment. Additional slip, equivalent to a Mw ~ 6.1–6.2 earthquake, on a secondary (1) NE dipping antithetic fault and/or (2) on a WNW dipping low‐angle fault in the hanging wall of the main system is required to better reproduce the complex deformation pattern associated with the greatest seismic event (the Mw 6.5 earthquake). The recognition of ancillary faults involved in the sequence suggests a complex interaction in the activated crustal volume between the main normal faults and the secondary structures and a partitioning of strain release.

show abstract

“…The alphabetical part is defined according to VR and the total number of stations contributing to the inversion. The numerical part is defined based on the percentage of the Compensated Linear Vector Dipole (CLVD) component in the solution (Scognamiglio et al, 2009). This quality factor determination scheme is followed by the GI-NOA for manual MT solutions.…”

Section: Moment Tensor Solution's Quality Evaluationmentioning

confidence: 99%