Data Publication

Surface displacement and strain data from laboratory subduction megathrust earthquake cycles

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

GFZ Data Services

(2023)

Descriptions

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).

Keywords

Originally assigned keywords

Seismotectonic modeling

Analog Modeling

Digital Image Correlation (DIC)

Particle Image Velocimetry (PIV)

EPOS

multi-scale laboratories

analogue models of geologic processes

analogue modelling results

EARTH SCIENCE > SOLID EARTH > GEOMORPHIC LANDFORMS/PROCESSES > TECTONIC PROCESSES

EARTH SCIENCE > SOLID EARTH > GEOMORPHIC LANDFORMS/PROCESSES > TECTONIC PROCESSES > SUBDUCTION

EARTH SCIENCE > SOLID EARTH > GEOMORPHIC LANDFORMS/PROCESSES > TECTONIC PROCESSES > TECTONIC UPLIFT

EARTH SCIENCE > SOLID EARTH > TECTONICS > EARTHQUAKES

Corresponding MSL vocabulary keywords

analogue modelling

digital image correlation (DIC)

particle image velocimetry (PIV)

MSL enriched keywords

Apparatus

analogue modelling

Software

digital image correlation (DIC)

particle image velocimetry (PIV)

Measured property

strain

Measured property

strain

tectonic plate boundary

convergent tectonic plate boundary

subduction

subducting plate interface

tectonic deformation structure

tectonic fault

thrust fault

unconsolidated sediment

clastic sediment

sand

analogue modelling material

elastic modelling material

natural elastic material

natural rubber

Apparatus

deformation testing

shear testing

friction - controlled slip rate

rate and state friction (RSF) parameters

Inferred deformation behavior

deformation behaviour

frictional deformation

Ancillary equipment

model surface monitoring (2D)

camera

friction - controlled slip rate

rate and state friction (RSF) parameters

trench

MSL enriched sub domains

analogue modelling of geologic processes

rock and melt physics

Resource Type

Dataset

Source

https://dataservices.gfz.de/panmetaworks/showshort.php?id=8adcaa43-fa4c-11ed-95b8-f851ad6d1e4b

Source publisher

GFZ Data Services

DOI

10.5880/gfz.4.1.2023.005