It’s a common fact that there are more interesting papers, published on high-IF journals, than time to read them all.
Thus, here a section aimed to be a GIVE-ME-A-REASON-TO-READ list, not merely a paper gallery.
If you are a FAULT2SHA member, and if you believe that your paper fits the aims and themes of the ESC Working Group, please contact the web administrators to add your titles to the list.
References are sorted by the year of publication, and alfabetically by the first author. The list will be updated on a monthly basis.
Baize, S., Nurminen, F., Sarmiento, A., Dawson, T., Takao, M., Scotti, O., Azuma, T., Boncio, P., Champenois, J., Cinti, F.R., Civico, R., Costa, C., Guerrieri, L., Marti, E., McCalpin, J., Okumura, K., Villamor, P.: A Worldwide and Unified Database of Surface Ruptures (SURE) for Fault Displacement Hazard Analyses, 91-1, 499-520.
Keywords: Fault Displacement Hazard, database, co-seismic fault displacement
Fault Displacement Hazard Analysis (FDHA) plays an important role in the risk assessment and design of both new and existing infrastructures, facilities or lifelines that are located across and near active faults. The primary objective of FDHA is to quantify the spatial distribution and amplitude of surface displacements and deformation caused by tectonic faulting. This kind of evaluation is primarily based on empirical relationships from historic fault ruptures. These relationships establish the likelihood of co-seismic fault displacements values, for on-fault (i.e. along the primary earthquake fault) and off-fault (i.e. distributed surface rupture off the primary rupture) displacements, for a given earthquake magnitude. However, the current equations are based on sparsely populated datasets, including a limited number of mainly pre-2000 events. In 2015 an international effort started to constitute a worldwide and unified surface co-seismic displacements database (SURE) to improve further fault displacements estimations. During two workshops in 2015 and 2016, discussions on how to build such a database started. Outcomes from these discussions were that (1) the first step is to unify the existing datasets; and (2) the future database will include recent cases which deformation have been captured and measured with modern techniques. New parameters which are relevant to properly describe the rupture will also be required in the future. This common effort would imply a large and open community of earthquake geologists to create a free and open access database.
Chartier, T., Scotti, O., and Lyon‐Caen, H.:
Keywords: Code, Fault systems, earthquake rates, multi-fault ruptures
This article is meant to be a support for users of SHERIFS (Seismic Hazard and Earthquake Rate in Faults Systems). SHERIFS allows to model the earthquake rates on fault considering a system level approach, complex multi fault ruptures and background seismicity. SHERIFS is built to be flexible and to explore a large number of epistemic uncertainty for vastly different fault systems.
Valentini, A., Pace, B.. Boncio, P., Visini, F., Pagliaroli, A., and Pergalani, F.: Definition of seismic input from fault-based PSHA: remarks after the 2016 Central Italy earthquake sequence, Tectonics, 38-2, 595-620 OPEN ACCESS
Keywords: Central Italy, seismic hazard, microzonation input
In the last 10 years, central Italy has been struck several times by moderate to strong earthquakes, with Mw up to 6.5. This work focuses on how the advances in earthquake science that follow a large, deeply studied earthquake might be promptly combined with updated approaches of seismic hazard analysis to guide applicative choices for seismic risk reduction, such as post-event seismic
microzoningand building design.
Visini, F., Valentini, A., Chartier, T., Scotti, O., and Pace, B.: Computational Tools for Relaxing the Fault Segmentation in Probabilistic Seismic Hazard Modelling in Complex Fault Systems, Pure and Applied Geophysics, https://doi.org/10.1007/s00024-019-02114-6
Keywords: Northern Italy, seismic hazard, fault segmentation
Recent complex coseismic ruptures have shown the need to consider different possible combinations of rupture scenarios in PSHA. In this study, this paper presents two new methodologies that model rates of ruptures along complex fault systems, one based on a floating rupture approach and another one based on assumed rupture scenarios. They represent alternatives to a recently proposed approach and further step to overcome the segmented and un-segmented approaches commonly used in PSHA in Europe.
Beauval, C., Marinière, J., Yepes, H., Audin, L., Nocquet, J.M., Alvarado, A., Baize, S., Aguilar, J., Singaucho, J.C., and Jomard, H.: A New Seismic Hazard Model for Ecuador, Bulletin of the Seismological Society of America, 108(3A), 1443–1464.
We present a comprehensive probabilistic seismic hazard study for Ecuador. Building on knowledge gained during the last decade about earthquake catalog, active tectonics, geodynamics, and geodesy, several alternative earthquake recurrence models have been developed. Interface subduction sources are modelled as dipping planes whereas inslab sources are modelled as dipping volumes. As faults are incompletely characterized throughout the country, two alternative models are developed for crustal shallow events: (1) an area model, with areas enclosing major fault systems and earthquake recurrence relying on past seismicity; (2) a fault model, where a simplified fault has been proposed for each main fault system, with earthquake recurrence inferred from fault slip rate estimates, fault surfaces and assumptions on the % of creep. We show the impact of each model and decision on the final hazard estimates. The results highlight how the different input datasets complement each other to provide an updated seismic hazard model.
Faure Walker, J.P., Visini, F., Roberts, G., Galasso, C., McCaffrey, K., and Mildon, Z.: Variable fault geometry suggests detailed fault-slip-sate profiles and geometries are needed for fault-based Probabilistic Seismic Hazard Assessment (PSHA), Bulletin of the Seismological Society of America, 109-1, 110-123
Keywords: Fault geometry, slip rate, seismic hazard
The addition of fault locations and slip rates improves seismic hazard assessments. In this paper, the authors demonstrate the importance of detailed along fault slip rate profiles and variable fault geometry for modeled recurrence intervals and shaking intensities using example faults from the Italian Apennines. This paper demonstrates that relying on only one or a few measurements of how fast the fault is moving along a fault and projecting these measurements along the entire fault may lead to underestimating the uncertainty in earthquake hazard calculations.
Iezzi, F., Mildon, Z., Faure Walker, J. P., Roberts,G., Goodall, H., Wilkinson, M., and Robertson, J.: Coseismic throw variation across along-strike bends on active normal faults: Implications for displacement versus length scaling of earthquake ruptures, Journal of Geophysical Research, Solid Earth, 123-11, 9817-9841 OPEN ACCESS
Keywords: Fault scaling relationships, co-seismic thow
Fault scaling relationships relating fault length to earthquake parameters such as maximum magnitude and maximum displacement are commonly used in fault-based seismic hazard analyses. However, there is a lot of
scatterin such relationships. This paper suggests that slip during an earthquake will change where there is a bend along the length of the fault and this change can be quantified and predicted using the proposed model that relates fault geometry, co-seismic throw across a fault and horizontal strain-rates. Therefore, consideration of the fault geometry should be taken into account when forming and utilisingfault scaling relationships.
Verdecchia, A., Pace, B., Visini, F., Scotti, O., Peruzza, L., and Benedetti, L.: Is viscoelastic relaxation a guide for secular earthquake cascades? Insights after the central Italy 2016-17 seismic sequence, Tectonics, 37-10, 3411-3428
Keywords: Central Italy, Coulomb stress changes, fault interaction
Central Italy is characterized by a network of active faults that interact in a complex manner. We calculated the coseismic plus postseismic Coulomb failure stress changes due to eight moderate-to-strong earthquakes that have struck Central Italy in the last century and culminated with the 2016–2017 sequence. Results from this modeling coupled with some synthetic tests simulating normal fault earthquakes with different magnitudes allowed us to highlight the importance of postseismic processes. Considering in the calculations the historical and paleoseismological data, several faults in Central Italy may be at present close to failure.
Azzaro, R., Barberi, G., D’Amico, S., Pace, B., Peruzza, L., and Tuvè, T.: When probabilistic seismic hazard climbs volcanoes: the Mt. Etna case, Italy – Part 1: Model components for sources parameterization, Nat. Hazards Earth Syst. Sci., 17, 1981-1998 OPEN ACCESS
Keywords: Mt Etna volcano, seismic sources
It is well known that volcanoes and earthquakes are associated, and some active volcanoes cause damaging earthquakes. Nonetheless, volcanoes usually are not pinpointed on a hazard map, as the effects of shallow, volcanic earthquakes can be overshadowed by stronger tectonic earthquakes in the region, particularly when long exposure periods are considered. In this study (Part 1, companion paper Part 2 Peruzza et al., below) we faced some challenges with software implementations and original concept scheme for an original PSHA at Mt. Etna, Italy.
Boncio, P., Liberi, F., Caldarella, M., and Nurminen, F.C.: Width of surface rupture zone for thrust earthquakes: implications for earthquake fault zoning, Nat. Hazards Earth Syst. Sci., 18, 241-256 OPEN ACCESS
Chartier, T., Scotti, O., Clément, C., Jomard, H., and Baize, S.: Transposing an active fault database into a fault-based seismic hazard assessment for nuclear facilities – Part 2: Impact of fault parameter uncertainties on a site-specific PSHA exercise in the Upper Rhine Graben, eastern France, Nat. Hazards Earth Syst. Sci., 17, 1585-1593 OPEN ACCESS
Keywords: Fault, PSHA, Rhine Grabben
Using the fault information from the BDFA (Jomard et al 2017) we calculate the seismic hazard for a site in the Upper Rhine Grabben (France). We explore the uncertainties affecting the faults and analyse the impact of each uncertainty on the hazard level at the site. The large uncertainty affecting the slip-rate value is the main contributor the uncertainty affecting the hazard at the site for the 10 000 years return period.
Chartier, T., Scotti, O., Lyon-Caen, H., and Boiselet, A.:
Methodology for earthquake rupture rate estimates of fault networks,
Example for the western Corinth rift, Greece, Nat. Hazards Earth Syst. Sci., 17-10, 1857-1869 OPEN ACCESS
Keywords: Fault systems, Earthquake rate estimate, Corinth Rift
The paper show a novel approach for modeling earthquake rates in fault systems based on three input ingredients : the slip-rate and geometry of the faults, hypotheses on the possible complex multi-fault ruptures, and the shape of the magnitude frequency distribution. This approach is applied to the Western Corinth Rift (Greece) and the epistemic uncertainty affecting the different input hypotheses is explored. Comparison between the modeled earthquake rates and rates calculated from independent data (earthquake catalog and paleoseismicity) allows to weight the different set of hypotheses.
Garciá-Mayordomo, J., Martín-Banda, R., Insua-Arévalo, J.M., Álvarez-Gómez, J.A., Martínez-Diáz, J.J., and Cabral, J.: Active fault databases: building a bridge between earthquake geologists and seismic hazard practitioners, the case of the QAFI v.3 database, Nat. Hazards Earth Syst. Sci., 17, 1447-1459 OPEN ACCESS
Jomard, H., Marc Cushing, E., Palumbo, L., Baize, S., David, C. and Chartier, T.: Transposing an active fault database into a seismic hazard fault model for nuclear facilities – Part 1: Building a database of potentially active faults (BDFA) for metropolitan France, Nat. Hazards Earth Syst. Sci., 17, 1573-1584 OPEN ACCESS
Peruzza, L., Azzaro, R., Gee, R., D’Amico, S., Langer, H., Lombardo, G., Pace, B., Pagani, M., Panzera, F., Ordaz, M., Suarez, M. L., and Tusa, G.: When probabilistic seismic hazard climbs volcanoes: the Mt. Etna case, Italy – Part 2: Computational implementation and first results, Nat. Hazards Earth Syst. Sci., 17, 1999-2015 OPEN ACCESS
Keywords: Mt Etna volcano, seismic hazard
It is well known that volcanoes and earthquakes are associated, and some active volcanoes cause damaging earthquakes. Nonetheless, volcanoes usually are not pinpointed on a hazard map, as the effects of shallow, volcanic earthquakes can be overshadowed by stronger tectonic earthquakes in the region, particularly when long exposure periods are considered. In this study (Part 2, companion paper Part 1 Azzaro et al., above) we faced some challenges with software implementations and original concept scheme for an original PSHA at Mt. Etna, Italy.
Keywords: Italy, seismic hazard, fault sources
Italy is one of the most seismically active countries in Europe. Moderate to strong earthquakes, with magnitudes of up to ∼7, have been historically recorded for many active faults. In this study,
theauthors present the results of an alternative seismogenic source model for use in a probabilistic seismic hazard assessment for Italy that integrates active fault and seismological data.
Yepes, H., Audin, L., Alvarado, A., Beauval, C., Aguilar, J., Font, Y., and Cotton, F.: A new view for the geodynamics of Ecuador: implication in seismogenic source definition and seismic hazard assessment, Tectonics, 35-5, 1249-1279.
Keywords: Ecuador, seismic hazard, interseismic coupling
A new view of Ecuador’s complex geodynamics has been developed in the course of modeling seismic source zones for probabilistic seismic hazard analysis. This study focuses on two aspects of the plates’ interaction at a continental scale: (a) age-related differences in rheology between Farallon and Nazca plates —marked by the Grijalva rifted margin and its inland projection—as they subduct underneath central Ecuador, and (b) the rapidly changing convergence obliquity resulting from the convex shape of the South American northwestern continental margin. Both conditions satisfactorily explain several characteristics of the observed seismicity and of the interseismic coupling.
Beauval, C., Yepes, H., Audin, L., Alvarado, A., Nocquet, J.M., Monelli, D., and Danciu, L.: Probabilistic Seismic-Hazard Assessment in Quito, Estimates and Uncertainties, Seismological Research Letters, 85-6, 1316-1327.
Keywords: Ecuador, seismic hazard, uncertainties
PSH is estimated for Quito, capital of Ecuador. Different earthquake recurrence models are explored for the
hostzone controlling the hazard estimates, and the impact on hazard is determined. This host zone approximately delineates the Quito fault system. The first recurrence model considers historical earthquake catalog and rates for magnitudes 6-7 are obtained by extrapolation of moderate magnitude statistics. The second model is a MFDestablished from slip rates based on geodetic measurements, assuming that no creep occurs on the fault. In the third model, the fault is assumed to be partially locked. In the fourth model, occurrences of magnitudes 6-7 are restricted to the Quito fault plane. We show the impact of each decision on the hazard estimates and demonstrate the importance of taking into account faults in hazard calculations.