Dataset

Surface displacement and strain data from laboratory subduction megathrust earthquake cycles

Kosari, Ehsan; Rosenau, Matthias; Metzger, Sabrina; Oncken, Onno;

2023-06 || GFZ Data Services

This data set is digital image correlation data, including surface displacement and strain data from laboratory subduction megathrust earthquake cycles. The data consists of grids of surface strain (elastic and permanent), trench-normal surface displacement, vorticity and divergence maps over analog seismic cycles, and time series of surface displacement. The data have been derived using a stereo camera setup and processed with LaVision Davis 10 software. Detailed descriptions of the experiments and results regarding the surface pattern of the strain can be found in Kosari et al. (2023), to which this data set is supplementary.

We use three configurations to mimic the along-strike heterogeneous spatiotemporal distribution of frictional locking (Rosenau et al., 2019; Kosari et al., 2022b). A central patch separates two stick-slip zones as an aseismic barrier in all configurations. The frictional properties of the central patch vary as a velocity-strengthening (VS configuration), a velocity-neutral (VN), and a velocity-weakening (VW configuration). The VW zone generates smaller slip events with a higher frequency (i.e., recurrence interval) than the stick-slip zones. Four frictionally different materials have been emplaced on the interface: The sticky-rice as velocity-weakening material (a-b<0) resulting in stick-slip cycles simulating earthquake cycles, fine-grained sugar and rubber-sand mixture as velocity-strengthening (a-b>0) and velocity-neutral (a-b=0) material, and fine-grained salt as velocity-weakening material (a-b<0) (Kosari et al., 2023).

Originally assigned keywords

Corresponding MSL vocabulary keywords

MSL enriched keywords

Originally assigned sub domains

analogue modelling of geologic processes

MSL enriched sub domains	analogue modelling of geologic processes rock and melt physics
Source	http://doi.org/10.5880/GFZ.4.1.2023.005
Source publisher	GFZ Data Services
DOI	10.5880/GFZ.4.1.2023.005
License	CC BY 4.0
Authors	Kosari, Ehsan 0000-0002-1052-4997 GFZ German Research Centre for Geosciences, Potsdam, Germany Rosenau, Matthias 0000-0003-1134-5381 GFZ German Research Centre for Geosciences, Potsdam, Germany Metzger, Sabrina 0000-0002-0803-6599 GFZ German Research Centre for Geosciences, Potsdam, Germany Oncken, Onno 0000-0002-2894-480X GFZ German Research Centre for Geosciences, Potsdam, Germany
References	Kosari, E., Rosenau, M., Metzger, S., & Oncken, O. (2023). Along-strike seismotectonic segmentation reflecting megathrust seismogenic behavior. Geology, 51(8), 707–712. https://doi.org/10.1130/g51115.1 10.1130/G51115.1 IsSupplementTo Adam, J., Urai, J. L., Wieneke, B., Oncken, O., Pfeiffer, K., Kukowski, N., Lohrmann, J., Hoth, S., van der Zee, W., & Schmatz, J. (2005). Shear localisation and strain distribution during tectonic faulting—new insights from granular-flow experiments and high-resolution optical image correlation techniques. Journal of Structural Geology, 27(2), 283–301. https://doi.org/10.1016/j.jsg.2004.08.008 10.1016/j.jsg.2004.08.008 Cites Kosari, E., Rosenau, M., Bedford, J., Rudolf, M., & Oncken, O. (2020). On the Relationship Between Offshore Geodetic Coverage and Slip Model Uncertainty: Analog Megathrust Earthquake Case Studies. Geophysical Research Letters, 47(15). Portico. https://doi.org/10.1029/2020gl088266 10.1029/2020GL088266 Cites Kosari, E., Rosenau, M., & Oncken, O. (2022). Strain Signals Governed by Frictional‐Elastoplastic Interaction of the Upper Plate and Shallow Subduction Megathrust Interface Over Seismic Cycles. Tectonics, 41(5). Portico. https://doi.org/10.1029/2021tc007099 10.1029/2021TC007099 Cites Rosenau, M., Corbi, F., & Dominguez, S. (2017). Analogue earthquakes and seismic cycles: experimental modelling across timescales. Solid Earth, 8(3), 597–635. https://doi.org/10.5194/se-8-597-2017 10.5194/se-8-597-2017 Cites Rosenau, M., Horenko, I., Corbi, F., Rudolf, M., Kornhuber, R., & Oncken, O. (2019). Synchronization of Great Subduction Megathrust Earthquakes: Insights From Scale Model Analysis. Journal of Geophysical Research: Solid Earth, 124(4), 3646–3661. Portico. https://doi.org/10.1029/2018jb016597 10.1029/2018JB016597 Cites
Contact	Kosari, Ehsan GFZ German Research Centre for Geosciences, Potsdam, Germany ehsan.kosari@gfz-potsdam.de Rosenau, Matthias GFZ German Research Centre for Geosciences, Potsdam, Germany rosen@gfz-potsdam.de
Citation	Kosari, E., Rosenau, M., Metzger, S., & Oncken, O. (2023). Surface displacement and strain data from laboratory subduction megathrust earthquake cycles [Data set]. GFZ Data Services. https://doi.org/10.5880/GFZ.4.1.2023.005