Seismology and Space-Based Geodesy

Tralli, David M.; Tajima, Fumiko

doi:10.1016/s0065-2687(08)60434-3

Cited by 2 publications

(1 citation statement)

References 154 publications

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“…A methodological improvement in the search of the causative fault was provided by Amoruso et al (2002), who applied a nonlinear approach for deriving the faulting mechanism by inverting simultaneously P-wave first arrivals and levelling data. This approach has important implications on the reliability of the different models, discussed later on, because seismicity data improve the estimation of strike, dip and slip of the source fault, whereas the geodetic data determine the location, the width and the fault length (Tralli & Tajima 1993). The model preferred by Amoruso et al (2002) envisages a ∼30-km long ∼N-S striking fault right along the Straits.…”

Section: P U B L I S H E D M O D E L S O N T H E 1 9 0 8 Fau Lt Ru P mentioning

confidence: 99%

Are the source models of the M 7.1 1908 Messina Straits earthquake reliable? Insights from a novel inversion and a sensitivity analysis of levelling data

Aloisi¹,

Bruno²,

Cannavò³

et al. 2012

Geophysical Journal International

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For decades, many authors have attempted to define the location, geometry and kinematics of the causative fault for the 1908 December 28, M 7.1 earthquake that struck the Messina Straits between Sicily and Calabria (southern Italy). The coseismic displacement caused a predominant downwarping of the Straits and small land uplift away from it, which were documented by levelling surveys performed 1 yr before and immediately after the earthquake. Most of the source models based on inversion of levelling data suggested that the earthquake was caused by a low angle, east-dipping blind normal fault, whose upper projection intersects the Earth surface on the Sicilian (west) side of the Messina Straits. An alternative interpretation holds that the causative fault is one of the high-angle, west-dipping faults located in southern Calabria, on the eastern side of the Straits, and may in large part coincide with the mapped Armo Fault. Here, we critically review the levelling data with the aim of defining both their usefulness and limits in modelling the seismogenic fault. We demonstrate that the levelling data alone are not capable of discriminating between the two oppositely dipping fault models, and thus their role as a keystone for modellers is untenable. However, new morphotectonic and geodetic data indicate that the Armo Fault has very recent activity and is accumulating strain. The surface observations, together with appraisal of macroseismic intensity distribution, available seismic tomography and marine geophysical evidence, lends credit to the hypothesis that the Armo and possibly the S. Eufemia faults are part of a major crustal structure that slipped during the 1908 earthquake.

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Section: P U B L I S H E D M O D E L S O N T H E 1 9 0 8 Fau Lt Ru P mentioning

confidence: 99%

Are the source models of the M 7.1 1908 Messina Straits earthquake reliable? Insights from a novel inversion and a sensitivity analysis of levelling data

Aloisi¹,

Bruno²,

Cannavò³

et al. 2012

Geophysical Journal International

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Dynamics of a zone of four parallel faults: A deterministic model

Senatorski¹

1995

J. Geophys. Res.

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We consider a two‐dimensional model for quasi‐static evolution of four parallel faults. The model is based on the physics of continuum, with slips along the faults, long‐range interactions, a distribution of barriers and asperities, a velocity dependent friction, healing and reactivation of cohesive forces, and a mutual causality between faulting and tectonic forces all taken into account. Both the long‐term time series of seismic activity and details of seismic and aseismic crustal deformations during each phase of the earthquake cycle are produced by the model. It is shown that the system whose evolution is described by a set of deterministic differential equations may exhibit periodic or quite irregular (despite its assumed symmetry) behavior, depending on model parameters.

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Seismology and Space-Based Geodesy

Cited by 2 publications

References 154 publications

Are the source models of the M 7.1 1908 Messina Straits earthquake reliable? Insights from a novel inversion and a sensitivity analysis of levelling data

Are the source models of the M 7.1 1908 Messina Straits earthquake reliable? Insights from a novel inversion and a sensitivity analysis of levelling data

Dynamics of a zone of four parallel faults: A deterministic model

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