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Data Publication
High-speed digital image correlation data from laboratory subduction megathrust models
Kosari, Ehsan | Rosenau , Matthias | Ziegenhagen, Thomas | Oncken, Onno
GFZ Data Services
(2022)
This data set includes data derived from high-speed surface displacement observations from analog earthquake experiments. The data consists of surface displacement of the experiment upper plate and slab, slip distribution, and grids of Coulomb Failure Stress (CFS). The surface displacement observations have been captured using a highspeed CMOS (Complementary Metal Oxide Semiconductor) camera (Phantom VEO 640L camera, 12 bit) and processed with LaVision Davis 10 software. Description of the experiments and results regarding the surface displacement observation, Slip distribution, and CFS can be found in Kosari et al. (2022), to which this data set is supplementary. We use an analog seismotectonic scale model approach (Rosenau et al., 2019 and 2017) to generate a catalog of analog megathrust earthquakes. The presented experimental setup is modified from the 3D setup used in Rosenau et al. (2019) and Kosari et al. ( 2020 and 2022). The subduction forearc model wedge is set up in a glass-sided box (1000 mm across strike, 800mm along strike, and 300 mm deep) with a dipping, elastic basal conveyor belt, and a rigid backwall. An elastoplastic sand-rubber mixture (50 vol.% quartz sandG12: 50 vol.% EPDM rubber) is sieved into the setup representing a 240 km long forearc segment from the trench to the volcanic arc. The shallow part of the wedge includes a basal layer of sticky rice grains characterized by unstable stick-slip sliding representing the seismogenic zone. The Stick-slip sliding in rice is governed by a rate-and-state dependent friction law similar to natural rocks. A flat-top (surface slope α=0) wedge overlies rectangular stick-slip patch/es over a 15-degree dipping basal thrust. Two different seismic configurations of the shallow part of the wedge base (the megathrust) represent the depth extent of the seismogenic zone in nature. In the first configuration (homogeneous configuration), a single large rectangular stick-slip patch (Width*Length=200*800 mm) is implemented as the main slip patch (MSP). In the second case (heterogeneous configuration), two square-shaped MSPs (200*200mm) have been emplaced, acting as two medium-size seismogenic asperities surrounded by a salt matrix hosting frequent small events. Slow continuous compression of the wedge by moving the basal conveyor belt at a speed velocity of 0.05 mm/s simulates plate convergence and results in the quasi-periodic nucleation of quasi-periodic stick-slip events (analog earthquakes) within the sticky-rice layer. The wedge responds elastically to these basal slip events, similar to crustal rebound during natural subduction megathrust earthquakes.
Keywords
Originally assigned keywords
Corresponding MSL vocabulary keywords
MSL enriched keywords
MSL original sub domains
MSL enriched sub domains i
Source publisher
GFZ Data Services
DOI
10.5880/fidgeo.2022.024
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
Ziegenhagen, Thomas
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., Ziegenhagen, T., & Oncken, O. (2022). Upper Plate Response to a Sequential Elastic Rebound and Slab Acceleration During Laboratory‐Scale Subduction Megathrust Earthquakes. Journal of Geophysical Research: Solid Earth, 127(9). Portico. https://doi.org/10.1029/2022jb024143
10.1029/2022JB024143
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., Bedford, J., Rudolf, M., & Oncken, O. (2020). <i>Digital image correlation data from analogue subduction megathrust earthquakes addressing the control of geodetic coverage on coseismic slip inversion</i> [Data set]. GFZ Data Services. https://doi.org/10.5880/GFZ.4.1.2020.003
10.5880/GFZ.4.1.2020.003
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
Kosari, E., Rosenau, M., & Oncken, O. (2022). <i>Digital image correlation data from laboratory subduction megathrust models</i> [Data set]. GFZ Data Services. https://doi.org/10.5880/FIDGEO.2022.015
10.5880/fidgeo.2022.015
Cites
Lin, J., & Stein, R. S. (2004). Stress triggering in thrust and subduction earthquakes and stress interaction between the southern San Andreas and nearby thrust and strike‐slip faults. Journal of Geophysical Research: Solid Earth, 109(B2). Portico. https://doi.org/10.1029/2003jb002607
10.1029/2003JB002607
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
Citiation
Kosari, E., Rosenau , M., Ziegenhagen, T., & Oncken, O. (2022). High-speed digital image correlation data from laboratory subduction megathrust models [Data set]. GFZ Data Services. https://doi.org/10.5880/FIDGEO.2022.024