Available presentations & posters > Session 2

Session 2. The seismic cycle: from transient and precursory deformation to seismic rupture

Conveners: M. Moreno, H. Perfettini, M. Radiguet, H. Ozener

In the last two decades, satellite measurements (Global Positioning System GPS and InSAR Interferometry) of surface deformation, in complement to seismology, have revealed the complexity and richness of the processes of strain accumulation and release during the seismic cycle. In particular, these data have characterized a variety of processes associated with earthquakes, from precursory activity to the early post-seismic relaxation period. Importantly, transient aseismic deformations have been shown to occur on faults in many tectonic settings, with varying spatial and temporal scales, providing constraints on the material properties and mechanics of seismogenic zones. Processes such as afterslip, slow slip events (SSE), apparent variations in fault coupling in space and time, play a major role in the seismic cycle. These aseismic processes are intimately linked with the seismicity: variations in seismicity rate, aftershocks, tectonic tremors, and triggering large earthquakes.

This session aims at improving our understanding of the complex dynamics of the seismic cycle with a special emphasis on the relation between seismic and aseismic slip. Fundamental questions such as the influence of aseismic slip on the nucleation of large earthquakes or reciprocally, the use of seismicity to characterize episodes of aseismic slip, are of particular importance. We are soliciting contributions that present new geodetic and/or seismic observations of transient phenomenon of the different phases of the seismic cycle (interseismic, postseismic, large earthquake rupture), as well as forward models developed to better understand the physical mechanisms and rheology of real fault zones, and the influence of aseismic processes in producing microseismicity to large earthquakes.

A discussion of the implication of the presented results for our global understanding of the seismic cycle is expected.

Keynote speaker

Jean-Paul Ampuero - California Institute of Technology (Caltech) - USA

Seismic cycle, stress concentration and the long-term weakness of faults

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Detailed Oral Program

Tuesday 11th September

8:30AM - 10AM: Seismic / aseismic interractions

The spectrum of slip behaviors emerging from the interactions between seismic and aseismic slip (invited)	Ampuero Jean Paul
History of seismic and aseismic slip along the central Ecuador subduction zone	Nocquet Jean-Mathieu
Constraints on Seismic and Aseismic Slip on the Cascadia Megathrust from geodesy and seismicity	Michel Sylvain
The Seismic Cycle and Strain Rates in the South Iceland Seismic Zone from GPS observations	Arnadottir Thora
Life in the stress shadow: Stress-constrained inversion for interseismic coupling on shallow megathrusts	Lindsey Eric

10:30AM - 12:30PM:

SSEs mechanisms

Episodic tremor and slip explained by fluid-enhanced microfracturing and sealing	Bernaudin Maxime
Examining the spectrum of a slow slip event in Cascadia: suggestions that a single fault zone process creates slow slip and tremor?	Hawthorne Jessica
Fluid-assisted healing of micro-cracks in fault damage zones	Yehya Alissar
Seismogenesis of dual subduction beneath Kanto, central Japan controlled by fluid release	Yoshioka Shoichi

Pre-EQ processes, EQ interractions

Earthquake Ruptures and Stress Changes in the Mexican Earthquake Sequence of 2017-2018	Fielding Eric
Observations of rapid large-scale slip/deformation of the slab before some large subduction earthquakes	Bouchon Michel
Periodic change in the interplate locking state off Kyushu Island, Southwest Japan, inferred from spatial gradient of displacement rate field and small repeating earthquakes	Iinuma Takeshi
A top-to-down migration of slip during the 2016 Kaikoura Earthquake	Saltogianni Vasso

Wednesday 12th September

8:30AM - 10AM: Postseismic processes and aftershock studies

Role of lower crust in the post-seismic deformation of the 2010 Maule earthquake: Insights from a model with non-linear viscosity	Pena Carlos
Postseismic deformation following the 2010 Mw 8.8 Maule earthquake in Chile: implications for the rheology of the central Andean crust and upper mantle	Weiss Jonathan
Transient Forearc Sliver Transport Found During Postseismic Recovery	Hobbs Tiegan
Imaging early postseismic slip in the hours to days following the 2016 Mw 7.8 Pedernales earthquake: where does it occur relative to longer-term postseismic slip?	Tsang Louisa
Aftershocks of the 2016 Mw 7.8 Ecuador earthquake reveal earthquake cycle is controlled by long-lived structures	Agurto-Detzel Hans
Postseismic deformation following the april 25, 2015 gorkha earthquake: afterslip versus viscous relaxation	François Jouanne

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List of posters

Micro-seismic monitoring of a shear deformation zone: a laboratory experiment	Cédric Lachaud, David Marsan, Maurine Montagnat, Jérôme Weiss
Using GPS measurements to solve tectonic behavior of western segment of the Makran Subduction Zone, Iran	Farokh Tavakoli, Andrea Walpersdorf, Fateme Khorrami, Seied Saadat, Hamid Nankali, Zahra Mousavi, Morteza Sedighi, Yahya Djamour
Aseismic slip preceding the 2017 earthquakes sequence in the Mexican subduction zone	Mathilde Radiguet, Jorge Jara, ekaterina Kazachkina, louise maubant, Nathalie Cotte, Vladimir Kostoglodov
Kinematic study of Iquique 2014 Mw 8.1 earthquake: understanding the segmentation of the seismogenic zone	Jorge Jara, Hugo Sanchez-Reyes, Anne Socquet, Fabrice Cotton, J Virieux, Andrei Maksymowicz, John Diaz-Mojica, Andrea Walpersdorf, Javier Ruiz, Nathalie Cotte, Edmundo Norabuena
Characterizing the long-term preparation phase of the 2014 North Chile Mw8.1 earthquake	Anne Socquet, Jorge Jara, Jesús Piña-Valdés, michel bouchon, David Marsan, Fabrice Cotton
Inversion of geodetic data: an original method applied to the interseismic deformation along the Northern Andes subduction zone Cancelled	Christel Marchica, Bernard Valette, Mathilde Radiguet
Post-seismic deformation after the 2016 Norcia earthquake (Italy) revealed by InSAR times series Cancelled	Lea Pousse-Beltran, Anne Socquet, Lucilla Benedetti, Marie-Pierre Doin, Magali Rizza, Nicola D'Agostino
Long-Term Velocity Field for Mexico country	Nathalie Cotte, Vladimir Kostoglodov, Andrea Walpersdorf, ekaterina Kazachkina, Aline Deprez
Interseismic and coseismic deformation on the Philippine Fault (Leyte Island) resolved by InSAR	John Dale Dianala, Romain Jolivet, Marion Thomas, Barry Parsons, Richard Walker
Dual control of fault intersections on stop-start rupture in the 2016 Central Italy seismic sequence	Richard Walters, L. Gregory, L. Wedmore, Tim Craig, K. McCaffrey, M. Wilkinson, J. Chen, Z. Li, J. Elliott, H. Goodall, F. Iezzi, F. Livio, A. Michetti, G. Roberts, E. Vittori
Where are the boundaries of the South Caspian Basin? Cancelled	Abdolreza Ghods, Farhad Sobouti, Khalil Motaghi, Esmaeel Shabanian
Interseismic Behavior of the Active Main Marmara Fault in Western Turkey	Zeynep Yılmaz, Ali Ozgün Konca, Semih Ergintav
Stochastic static fault slip inversion from geodetic data with non-negativity and bound constraints	Jean-Mathieu Nocquet
The 2013 Saravan intra-slab earthquake in the SE Iranian Makran subduction zone (Mw=7.7): precursor of a long awaited inter-plate event?	Fateme Khorrami, Andrea Walpersdorf, Zahra Mousavi, Mathilde Radiguet, Abdoreza Saadat, Farokh Tavakoli, Hamidreza Nankali, Yahya Djamour, Morteza Sedighi, James Hollingsworth
Fault interactions and synchronization: insight from the 1936-1997 NE Lut earthquake sequence	Mathilde Marchandon, Mathilde Vergnolle, Olivier Cavalié
A stochastic view on the strain budget of the Ecuador-Colombia subduction zone	Baptiste Gombert, Zacharie Duputel, Romain Jolivet, Mark Simons, Junle Jiang, Cunren Liang, Eric Fielding, Luis Rivera
Temporal evolution of fault coupling associated with the occurrence of slow slip events in central Japan	Lucile Bruhat, Junichi Fukuda
Inversion of the physical parameters that control the onset of postseismic slip	Cedric Twardzik, Mathilde Vergnolle, Louisa Tsang, Anthony Sladen
Shallow creep along the 1999 Izmit earthquake's rupture (Turkey) from high temporal resolution interferometric synthetic-aperture radar data (2011-2017)	Gokhan Aslan, Cécile Lasserre, Ziyadin Cakir, François Renard, Semih Ergintav
Integrated study of the transient slow slip events beneath the Boso peninsula, Japan	Lou Marill, Anne SOCQUET, Baptiste Rousset, David Marsan, Aline Deprez
Snapshot of Heterogeneous Post-Seismic Deformation Following the 2016 Mw 7.8 Pedernales Earthquake, coastal Ecuador	Patricia A. Mothes, Frederique Rolandone, Jean-Mathieu Nocquet, Paúl Jarrín, Falk Amelung
Fault geometry and coseismic slip for the Balochistan Earthquake (2013, Mw7.7, Pakistan) inferred from SAR and optical data	Benjamin LAUER, Raphael Grandin, Yann KLINGER, Amaury Vallage, Romain Jolivet, Arthur Delorme
Analogue Geodetic Slip Inversion Technique (AGSIT): Monitoring time-dependent slip distribution along analogue subduction megathrusts	Ehsan Kosari, Matthias Rosenau, Jonathan Bedford, Michael Rudolf, Onno Oncken
The early postseismic slip (i.e., on the first day): A significant contribution to the postseismic slip budget	Cedric Twardzik, Mathilde Vergnolle, Anthony Sladen, Antonio Avallone
Source Model for the Mw 6.5, 29 March 2017 Kamchatka Peninsula Earthquake from InSAR geodetic technique	Magdalena Vassileva, Mahdi Motagh, Thomas Walter
The 5th April 2017 Sefid Sang earthquake (Mw 6) and its implication on the geodynamic of NE Iran	Mahtab Aflaki, Zahra Mousavi, Abdolreza Ghods, Esmaeil Shabanian, Sanaz Vajedian, Maryam Akbarzadeh
The 2017 Slow slip event in Guerrero Area (Mexico), seen by spatial geodesy	Louise Maubant, Erwan Pathier, Marie-Pierre Doin, Simon Daout, Mathilde Radiguet
Stastitical analysis for the next-earthquake distribution in terms of conditioned probabilities	Bogdan Felix Apostol, Luminita Ardeleanu, Stefan Balan
An Analysis of Strain Accumulation in Turkey	İlke Deniz
The 1999 Mw 7.6 Chi-Chi earthquake: Co-seismic study based on InSAR and GPS data	Marine Roger, Peter Clarke, Jyr-Ching Hu, Zhenhong Li
Evidence for aseismic slip driven by pore fluid pressure following the 2016 Kaikōura Earthquake	Ian Hamling, Phaedra Upton
Locking degree for the Chilean Subduction Zone inferred through Bayesian inversion of GPS observations: Implications for seismic hazard and earthquake mechanics	Marcos Moreno, Jan Bolte, Frederik Tilmann, Shaoyang Li, Christian Sippl, Daniel Melnick
Revisiting slow slip events occurrence in Boso Peninsula, Japan, combining GPS data and repeating earthquakes analysis	B. Gardonio, D. Marsan, A. Socquet, M. Bouchon, J. Jara, Q. Sun, N. Cotte, M. Campillo

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