Cedric Twardzik Lecturer

Présentation

How do faults release the stresses they have accumulated over tens or hundreds of years? This is the main question that has motivated my research. I have used seismological and geodetic observations combined with modelling approaches to infer how faults slip at depth. In particular, I have focused on the pre-seismic phase (i.e. how earthquakes start), the co-seismic phase (i.e. how earthquakes propagate and stop), and the post-seismic phase (i.e. how faults continue to relax after rupture).

Publications

Article dans une revue (22)

Static and quasi-static inversion of fault slip during laboratory earthquakes Feyza Arzu,Cedric Twardzik,B Fryer,Y Xie,J -P Ampueroet al. Geophysical Journal International, 2026, 244 (2), ⟨10.1093/gji/ggaf507⟩ Article dans une revue hal-05519668v1
Direct estimation of earthquake source properties from a single CCTV camera Soumaya Latour,Mathias Lebihain,Harsha Bhat,Cédric Twardzik,Quentin Bleteryet al. Science, 2025, 390 (6772), pp.463-467. ⟨10.1126/science.adz1705⟩ Article dans une revue hal-05342274v1
On the emergence of fault afterslip during laboratory seismic cycles Corentin Noël,Cedric Twardzik,Pierre Dublanchet,François Passelègue Earth and Planetary Science Letters, 2025, 658, pp.119288. ⟨10.1016/j.epsl.2025.119288⟩ Article dans une revue hal-04985988v1
Kinematic Inversion of Aseismic Fault Slip During the Nucleation of Laboratory Earthquakes P. Dublanchet,François Passelègue,H. Chauris,A. Gesret,C. Twardziket al. Journal of Geophysical Research : Solid Earth, 2024, 129 (12), ⟨10.1029/2024JB028733⟩ Article dans une revue hal-04843964v1
Revisiting the 2015 M&lt;sub&gt;w&lt;/sub&gt; = 8.3 Illapel earthquake: unveiling complex fault slip properties using Bayesian inversion E. Caballero,Z. Duputel,Cedric Twardzik,L. Rivera,E. Kleinet al. Geophysical Journal International, 2023, 235 (3), pp.2828-2845. ⟨10.1093/gji/ggad380⟩ Article dans une revue insu-04582011v1
Transient Brittle Creep Mechanism Explains Early Postseismic Phase of the 2011 Tohoku‐Oki Megathrust Earthquake: Observations by High‐Rate GPS Solutions Axel Periollat,Mathilde Radiguet,Jérôme Weiss,Cédric Twardzik,David Amitranoet al. Journal of Geophysical Research : Solid Earth, 2022, 127 (8), pp.e2022JB024005. ⟨10.1029/2022JB024005⟩ Article dans une revue hal-04420761v1
Bayesian inference on the initiation phase of the 2014 Iquique, Chile, earthquake Cedric Twardzik,Zacharie Duputel,Romain Jolivet,Emilie Klein,Paul Rebischung Earth and Planetary Science Letters, 2022, 600, pp.117835. ⟨10.1016/j.epsl.2022.117835⟩ Article dans une revue hal-03845898v1
Seismic and Aseismic Fault Slip During the Initiation Phase of the 2017 Mw=6.9 Valparaíso Earthquake Emmanuel Caballero,Agnès Chounet,Zacharie Duputel,Jorge Jara,Cedric Twardziket al. Geophysical Research Letters, 2021, 48 (6), ⟨10.1029/2020GL091916⟩ Article dans une revue hal-03431936v1
Locating surface deformation induced by earthquakes using GPS, GLONASS and Galileo ionospheric sounding from a single station Florian Zedek,Lucie Rolland,T. Dylan Mikesell,Anthony Sladen,Bertrand Delouiset al. Advances in Space Research, 2021, 68 (8), pp.3403-3416. ⟨10.1016/j.asr.2021.06.011⟩ Article dans une revue hal-03452276v1
Very early identification of a bimodal frictional behavior during the post-seismic phase of the 2015 Mw 8.3 Illapel, Chile, earthquake Cedric Twardzik,Mathilde Vergnolle,Anthony Sladen,Louisa Tsang Solid Earth, 2021, 12, pp.2523-2537. ⟨10.5194/se-12-2523-2021⟩ Article dans une revue hal-03447477v1
Imaging of Seismogenic Asperities of the 2016 ML 6.0 Amatrice, Central Italy, Earthquake Through Dynamic Rupture Simulations Hideo Aochi,Cedric Twardzik Pure and Applied Geophysics, 2020, 177 (5), pp.1931-1946. ⟨10.1007/s00024-019-02199-z⟩ Article dans une revue hal-02859878v1
Kinematics of the 2012 Ahar–Varzaghan complex earthquake doublet (Mw6.5 and Mw6.3) S Momeni,A Aoudia,S Tatar,C. Twardzik,S Madariaga Geophysical Journal International, 2019, 217 (3), pp.2097-2124. ⟨10.1093/gji/ggz100⟩ Article dans une revue hal-02200828v1
Imaging rapid early afterslip of the 2016 Pedernales earthquake, Ecuador Louisa L.H. Tsang,Mathilde Vergnolle,Cedric Twardzik,Anthony Sladen,Jean-Mathieu Nocquetet al. Earth and Planetary Science Letters, 2019, 524, pp.115724. ⟨10.1016/j.epsl.2019.115724⟩ Article dans une revue hal-02326771v1
Unravelling the contribution of early postseismic deformation using sub-daily GNSS positioning Cedric Twardzik,Mathilde Vergnolle,Anthony Sladen,Antonio Avallone Scientific Reports, 2019, 9 (1), pp.1775. ⟨10.1038/s41598-019-39038-z⟩ Article dans une revue hal-04420722v1
Preparing for InSight: Evaluation of the Blind Test for Martian Seismicity Martin van Driel,Savas Ceylan,John Francis Clinton,Domenico Giardini,Hector Alemanyet al. Seismological Research Letters, 2019, 90 (4), pp.1518-1534. ⟨10.1785/0220180379⟩ Article dans une revue hal-02365912v1
Exploring the uncertainty range of coseismic stress drop estimations of large earthquakes using finite fault inversions Mareike Adams,Cedric Twardzik,Chen Ji Geophysical Journal International, 2017, 208 (1), pp.86-100. ⟨10.1093/gji/ggw374⟩ Article dans une revue hal-04420718v1
The Earthquake‐Source Inversion Validation (SIV) Project Martin Mai,Danijel Schorlemmer,Morgan Page,Jean‐paul Ampuero,Kimiyuki Asanoet al. Seismological Research Letters, 2016, 87 (3), pp.690 - 708. ⟨10.1785/0220150231⟩ Article dans une revue hal-01692238v1
Modeling of the coseismic electromagnetic fields observed during the 2004 M w 6.0 Parkfield earthquake Yongxin Gao,Jerry M Harris,Jian Wen,Yihe Huang,Cedric Twardziket al. Geophysical Research Letters, 2016, 43 (2), pp.620-627. ⟨10.1002/2015GL067183⟩ Article dans une revue hal-04417220v1
InSAR measurement of the deformation around Siling Co Lake: Inferences on the lower crust viscosity in central Tibet Marie‐pierre Doin,Cédric Twardzik,Gabriel Ducret,Cécile Lasserre,Stéphane Guillasoet al. Journal of Geophysical Research : Solid Earth, 2015, 120 (7), pp.5290-5310. ⟨10.1002/2014JB011768⟩ Article dans une revue hal-04417179v1
Rupture history of 2014 Mw 6.0 South Napa earthquake inferred from near‐fault strong motion data and its impact to the practice of ground strong motion prediction Chen Ji,Ralph J Archuleta,Cedric Twardzik Geophysical Research Letters, 2015, 42 (7), pp.2149-2156. ⟨10.1002/2015gl063335⟩ Article dans une revue hal-04416186v1
Inversion for the physical parameters that control the source dynamics of the 2004 Parkfield earthquake C. Twardzik,S. Das,R. Madariaga Journal of Geophysical Research : Solid Earth, 2014, 119 (9), pp.7010-7027. ⟨10.1002/2014jb011238⟩ Article dans une revue hal-04391290v1
Robust features of the source process for the 2004 Parkfield, California, earthquake from strong-motion seismograms C. Twardzik,R. Madariaga,S. Das,S. Custódio Geophysical Journal International, 2012, 191 (3), pp.1245-1254. ⟨10.1111/j.1365-246x.2012.05653.x⟩ Article dans une revue hal-04391282v1

Thèse (1)

Study of the earthquake source process and seismic hazards Cédric Twardzik Geophysics [physics.geo-ph]. University of Oxford, 2014. English. ⟨NNT : ⟩ Thèse tel-04429054v1