SCIENTIFIC JOURNALS

Title: Kinematic analysis of secondary faults within a distributed shear-zone reveals unforeseen seismic hazard

Authors: Hector Perea, Eulàlia Gràcia, Sara Martínez-Loriente, Rafael Bartolomé, Laura Gómez de la Peña, Ximena Moreno, Claudio Lo Iacono, Susana Diez, Olvido Tello, María Ballesteros, Ben de Mol and Juanjo Dañobeitia

Year : 2018
Journal: Marine Geology, 399, 23-33

DOI: 10.1016/j.margeo.2018.02.002

Title: Earthquake crisis unveils the growth of an incipient continental fault system

Authors: Eulàlia Gràcia, Ingo Grevemeyer, Rafael Bartolomé, Hector Perea, Sara  Martínez-Loriente, Laura Gómez de la Peña, Antonio Villaseñor, Yann Klinger, Claudio Lo Iacono, Susana Diez, Alcinoe Calahorrano, Miquel Camafort, Sergio Costa, Elia d’Acremont, Alain Rabaute and César R. Ranero

Year : 2019 (Accepted July 2019)
Journal: Nature Communications

Chapter Title: 4.5. Slow active faults along the extensional northeastern margin of the Iberian Peninsula

Authors: Hector Perea, Eulàlia Masana and José Luis Simón

In: The Geology of Iberia: A Geodynamic Approach (Eds. C. Quesada and J.T. Oliveira)

Volume 5: Active Processes: Seismicity, Active Faulting and Relief (Coord. J.M. Azañón and J. Cabral)

Year : 2020

DOI: 10.1007/978-3-030-10931-8

Title:  Structural Modeling of the Western Transverse Ranges: An Imbricated Thrust Ramp Architecture

Authors: Yuval Levy, Tom K. Rockwell, John H. Shaw, Andreas Plesch, Neal W. Driscoll and Hector Perea

Year: Submitted in July 2019
Journal: Lithosphere

Title: Faulting and Folding of the Transgressive Surface Offshore Ventura Records Multiple Earthquake Events in the Holocene

Authors: Hector Perea, Gülsen Ucarkus, Neal Driscoll, Graham Kent, Yuval Levy and Thomas Rockwell

Year: Resubmitted in summer 2019
Journal: Geosphere

Title: Evaluating the coulomb static stress evolution and fault interaction in an extensional intra-volcanic arc: 1000 years of Earthquake history in the Acambay graben, Mexico

Authors: Rodrigo León, Hector Perea, Pierre Lacan, Ramón Zuñiga and María Ortuño

Year: To submit in fall 2019
Journal: Geosphysical Journal International

ABSTRACTS TO CONGRESSES

Title: Fault and fold segmentation and complexity: New insights from 3D P-Cable data offshore Southern California.

Authors: Hector Perea, James Holmes and Neal Driscoll.

Meeting: Fault2SHA 2019 workshop in Barcelona (Spain).

We presented an interpretation of the high-resolution seismic 3D seismic dataset in the offshore Southern California between Los Angeles and San Diego. The results show the presence of a complex fault system developed in a shear zone along the Newport-Inglewood Rose Canyon fault.

Title: Seismic crisis reveals the development of an incipient continental fault system in the Alboran sea.

Authors: Eulàlia Gràcia, Ingo Grevemeyer, Rafael Bartolomé, Hector Perea, Sara Martínez-Loriente, Laura Gómez de la Peña, Antonio Villaseñor, Yann Klinger, Claudio Lo Iacono, Susana Diez, Alcinoe Calahorrano, Miquel Camafort, Sergio Costa, Elia d’Acremont, Alain Rabaute and César R. Ranero.

Meeting: Fault2SHA 2019 workshop in Barcelona (Spain).

We report evidence of left-lateral strike-slip displacement along the Al-Idrissi fault, characterize their fault segments and demonstrate that the fault was the source of the 2016 events.

Title: Fault Segmentation Controls on Stratal Geometry and Morphology; New Insights from 3D P-Cable data Offshore Southern California.

Authors: Hector Perea, James Holmes and Neal Driscoll.

Meeting: AGU 2018 Fall meeting in Washington DC (US).

We presented a preliminary interpretation of the high-resolution seismic 3D seismic dataser in the offshore along the Newport-Inglewood Rose Canyon fault, in the offshore Southern California between Los Angeles and San Diego.

Title: Analysis of Fault-Fold Structures along the Newport-Inglewood Rose Canyon Fault System at an unprecedented scale using 3D P-Cable seismic reflection data

Authors: James Holmes, Hector Perea, Neal Driscoll and Graham Kent.

Meeting: AGU 2018 Fall meeting in Washington DC (US).

Using state-of-the-art 3D geophysical tools, we have created high-resolution maps of structures along the Newport-Inglewood Rose Canyon fault. Using these maps we show examples of how fault segments tend to distribute strain and the crustal deformation that is created in the process. .

Title: Modelado del cambio de esfuerzo de Coulomb para el sismo de 1912 Mw=7 Acambay: Implicaciones en la distribución de sismicidad y peligro sísmico del centro de México.

Authors: Rodrigo León, Pierre Lacan, Hector Perea, María Ortuño and Ramón Zuñiga.

Meeting: RAUGM 2018 Annual Meeting in Puerto Vallarta (Mexico).

A study of the Coulomb stress transfer has been done to show the influence of the 1912 Acambay earthquake, produced in the Acambay fault in the Trans-Mexican Volcanic Belt, to understand the distribution of the regional seismicity after the earthquake and reveal the faults that accumulated stress due to this event and that could be close to rupture in a future event.

Title: Structural Architecture of the Western Transverse Ranges and Potential for Large Earthquakes – New Results of Trishear Forward Models.

Authors: Yuval Levy, Tom Rockwell, John Shaw, Andreas Plesch, Neal Driscoll and Hector Perea.

Meeting: SCEC 2018 Annual Meeting in Palm Springs (US).

To test different interpretations for the evolution and structure of the WTR, we used Trishear forward modelling. The Trishear models are a good first-order match to published geologic maps and well data. The modelling of multiple cross-sections argues that all of the observed deformation can be explained by an evolving fold and thrust belt, which includes a regionally extensive decollement underlying the observed thrusts and folds.

Title: The growth of a continental fault system in the Alboran sea constrained by geological and seismological data.

Authors: Eulàlia Gràcia, Ingo Grevemeyer, Rafael Bartolomé, Hector Perea, Sara Martínez-Loriente, Laura Gómez De La Peña, Antonio Villaseñor, Miquel Camafort, Cristina Sanchez Serra and César R. Ranero.

Meeting: ESC 2018 General Assembly in Valletta (Malta).

We report evidence of left-lateral strike-slip displacement in the Al-Idrissi fault, characterize their fault segments and demonstrate that this is a basement fault and the source of the 2016 earthquake events. Located along a lithospheric boundary, the Al-Idrissi Fault System is a young structure.

Title: New insights of the Iberian-African plate boundary along the Alboran basin (western Mediterranean) based on deep seismic images.

Authors: Hector Perea, Gülsen Ucarkus, Neal Driscoll, Graham Kent and Thomas Rockwell.

Meeting: SSA 2017 Annual Meeting in Denver (US).

We presented the preliminary results on the Quaternary active tectonic deformation in the offshore between Ventura and Santa Barbara cities using high-resolution CHIRP seismic data.

Title: Unveiling the largest strike-slip fault systems in the Alboran basin with unprecedented resolution.

Authors: Eulàlia Gràcia, Rafael Bartolomé, Hector Perea, Sara Martínez-Loriente, Laura Gómez De La Peña, Miquel Camafort, Claudio Lo Iacono, Cristina Sanchez Serra, William Meservy, Eulàlia Masana, Ingo Grevemeyer and César R. Ranero.

Meeting: Iberfault 2018 in Alicante (Spain).

We present an overview of the three largest continental strike-slip fault systems in the Alboran Basin: Carboneras, Yusuf and Al-Idrissi. Our dataset results from an integration of different types of acoustic and seismic data. This data is used to map and characterize better the active fault systems.

Title: Structural architecture of the Western Transverse Ranges and potential for large earthquakes – Trishear forward models.

Authors: Yuval Levy, Tom Rockwell, John Shaw, Andreas Plesch, Neal Driscoll and Hector Perea.

Meeting: SSA 2018 Annual Meeting in Miami (US).

To test different interpretations for the evolution and structure of the WTR, we used Trishear forward modelling. The Trishear models are a good first-order match to published geologic maps and well data. The modelling of multiple cross-sections argues that all of the observed deformation can be explained by an evolving fold and thrust belt, which includes a regionally extensive decollement underlying the observed thrusts and folds.

Title: Is The Iberian-African plates boundary well defined in the Alboran Basin of the Westernmost Mediterranean?

Authors: Laura Gómez de la Peña, César Ranero, Eulàlia Gràcia, Hector Perea, Guillermo Booth-Rea and Jose Miguel Azañón.

Meeting: EGU General Assembly 2018 in Vienna (Austria).

In this study, we estimate the total slip accommodated by the most prominent tectonic structures in the Alboran sea since the earliest Pliocene. Results show that estimated total slip accommodated by the main fault system may be similar (with error bounds) to the estimated plate convergence value since the Messinian time.

Title: Holocene deformation offshore Ventura basin, CA, constrained by new high-resolution geophysical data

Authors: Hector Perea, Gülsen Ucarkus, Neal Driscoll, Graham Kent, Yuval Levy and Thomas Rockwell.

Meeting: AGU 2017 Fall meeting in New Orleans (US).

We presented the final interpretation of the high-resolution seismic CHIRP profiles and the mapped offshore geological Holocene active structures in the offshore between Ventura and Santa Barbara cities.

Title: Holocene deformation events in the offshore Transverse Ranges (California, USA) constrained by new high-resolution geophysical data.

Authors: Hector Perea, Gülsen Ucarkus, Neal Driscoll, Graham Kent, Yuval Levy and Thomas Rockwell.

Meeting: PATA 2017 Annual Meeting in Blenheim (New Zealand).

We presented the high-resolution seismic CHIRP profiles and the analysis of the Holocene deformation events (paleoearthquakes) in different folding and faulting systems in the offshore between Ventura and Santa Barbara cities.

Title: New high-resolution seismic data reveals the Holocene active structures and deformation events in offshore Ventura basin, CA.

Authors: Hector Perea, Gülsen Ucarkus, Neal Driscoll, Graham Kent, Yuval Levy and Thomas Rockwell.

Meeting: SCEC 2017 Annual Meeting in Palm Springs (US).

We presented the high-resolution seismic CHIRP profiles showing Holocene active tectonic deformation in the offshore between Ventura and Santa Barbara cities.

Title: Quaternary active tectonic deformation of the transgressive surface offshore Ventura, CA, constrained by new geophysical data

Authors: Hector Perea, Gülsen Ucarkus, Neal Driscoll, Graham Kent and Thomas Rockwell.

Meeting: SSA 2017 Annual Meeting in Denver (US).

We presented the preliminary results on the Quaternary active tectonic deformation in the offshore between Ventura and Santa Barbara cities using high-resolution CHIRP seismic data.

Title: Active deformation and seismogenic characterization of secondary faults in the Alboran Sea constrained by high-resolution bathymetry and seismics

Authors: Hector Perea, Eulàlia Gràcia, Rafael Bartolomé, Sara Martínez-Loriente, Laura Gómez de la Peña, Ximena Moreno, Claudio Lo Iacono, Susana Diez, Olvido Tello, María Ballesteros, Ben de Mol and Juan José Dañobeitia.

Meeting AGU 2016 Fall meeting in San Francisco (US).

We presented the Averroes faults and North Averroes faults in the Alboran Sea (western Mediterranean), their kinematics and evolution, and characterized their seismic hazard.

Title: Kinematic analysis of distributed strike-slip shear zone reveal significant geohazard by secondary faults in the Alboran basin

Authors: Hector Perea, Eulàlia Gràcia, Rafael Bartolomé, Sara Martínez-Loriente, Laura Gómez de la Peña, Ximena Moreno, Claudio Lo Iacono, Susana Diez, Olvido Tello, María Gómez-Ballesteros, Ben de Mol and Juanjo Dañobeitia.

Meeting: FLOWS 2016 meeting (https://www.flows-cost.eu/) (COST Action ES1301) in Barcelona (Spain).

We presented the Averroes faults and North Averroes faults in the Alboran Sea (western Mediterranean), their kinematics and evolution, and characterized their seismic hazard.

FAULT2SHA WORKSHOP

Scope

Earthquake ruptures can be accommodated in a complex manner by interaction among faults of very different characteristics and within a broad system, as it has been observed on recent large earthquakes (e.g. 2010 El Mayor Cucapah earthquake; 2016 Kaikoura earthquake). Modern seismic hazard assessment should thus be aimed at modeling fault-sources as an interacting system.

This 4th workshop of the Fault2SHA ESC Working Group was be devoted to complex-interacting earthquake fault systems, including discussion on available data (paleoseismological, geodetic, seismological, case histories) as well as on approaches for their modelling and integration into SHA. The meeting’s motto was “InterAction”. Not just because we wanted to debate about fault interaction as one of the main processes leading to complexity in active fault systems, but because we were looking forward to achieve effective communication between data providers, modelers and hazard analysts.

 

Program

The workshop consisted of three sessions, a roundtable and a debate session:

Session 1 – The EBSZ (SE Spain) lab: advances in earthquake geology research and seismic hazard modelling. The aim of this session was to analyze and discuss recent research work done specifically in the EBSZ and particularly on earthquake geology topics with implications in SHA, as well as seismic hazard models of the area.

Session 2 – Earthquake fault rupture and slip complexities: How-To OBSERVE them from field data. This session encompassed field research showing observations of complexity of earthquake fault systems: multi-fault ruptures, slip variations, ruptures on previously unknown faults, triggered ruptures, clustered and episodic behavior.

Session 3 – Earthquake fault rupture and slip complexities: How-To MODEL them in SHA.  This session was devoted to research done on modelling multi-fault complex ruptures, as well as slip complexity, in fault hazard analysis.

Invited keynote lectures
Presentation: Advances and Challenges in Fault-hazard Modelling in the Eastern Betics Zone

Speakers: Eulalia Masana (Univ. Barcelona) and Belén Benito (Univ. Politécnica de Madrid)

Presentation: 2016 Kaikōura Earthquake: Reflections and Lessons learnt

Speaker: Kelvin Berryman (GNS Science, New Zealand)

Presentation: Observation of Fault Complexity from Recent Earthquakes

Speaker: Tom Rockwell (San Diego State University, USA)

Presentation: Causes and ways for modelling complexity in SHA

Speaker: Bruno Pace (Università degli Studi G. d’Annunzio Chieti e Pescara, Italy)

Host organizing committee

University of Barcelona (UB): María Ortuño, Eulàlia Masana, Octavi Gómez-Novell, Gia Kzhazaradze, Robert López, Raimon Pallàs
Institute of Marine Sciences (ICM-CSIC): Eulàlia Gràcia, Hector Perea, Rafa Bartolomé, Cesar Ranero
IGME (Geological Survey of Spain): Julián García-Mayordomo


Supporting and Scientific committee (Fault2SHA Executive Committee members)

Oona Scotti (IRSN, France), Laura Peruzza (OGS, Italy), Bruno Pace (Università Chieti-Pescara, Italy), Francesco Visini (INGV, Italy), Lucilla Benedetti (CEREGE, France), Graeme Weatherill (GFZ, Germany), Joanna Faure-Walker (UCL, United Kingdom), Julián García-Mayordomo (IGME, Spain), María Ortuño (UB, Spain)

 

Financial support by the Universitat de Barcelona, the Institut de Ciències del Mar ICM-CSIC and the European Union’s horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Grant Agreement No 6657769 (PALEOSEISQUAKE).

 

This project has received funding from the European Union's horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Grant Agreement No 6657769

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