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 (21)

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
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
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
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
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
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