Data Publication

Digital image correlation data from analogue subduction megathrust earthquakes addressing the control of geodetic coverage on coseismic slip inversion

Kosari, Ehsan | Rosenau, Matthias | Bedford, Jonathan | Rudolf, Michael | Oncken, Onno

GFZ Data Services

(2020)

Descriptions

This data set includes digital image correlation data from thirteen analogue earthquakes generated by means of an analogue seismotectonic scale model approach. The data consists of grids of 3D static coseismic surface displacements. The data have been derived using a stereo camera setup and processed with LaVision Davis 8 software. Detailed descriptions of the experiments and results regarding the control of geodetic coverage on the slip inversion problem can be found in Kosari et al. (2020) to which this data set is supplementary material. We use an analogue seismotectonic scale model approach (Rosenau et al., 2017) to generate a catalogue of analogue megathrust earthquakes (Table 1). The presented experimental setup is modified from the 3D setup used in Rosenau et al. (2019). To monitor surface deformation of the wedge analogue model a stereoscopic set of two CCD cameras (LaVision Imager pro X 11MPx, 14 bit) monitors images the wedge surface continuously at 2.5 Hz. To derive observational data similar to those from geodetic techniques, i.e. velocities at the location on the surface, we use digital image correlation (DIC, Adam et al., 2005) to derive the 3D incremental surface displacement (or velocity) at high spatial resolution (< 0.1 mm). The time series of incremental surface displacement data was calculated using LaVision Davis 8 software. The result is an evenly spaced grid of vectors per time step, oriented parallel with respect to the principal dimensions of the box.

Keywords

Originally assigned keywords

EPOS

multi-scale laboratories

analogue models of geologic processes

analogue modeling results

Digital Image Correlation (DIC) / Particle Image Velocimetry (PIV) > StrainMaster (La Vision GmbH)

EARTH SCIENCE > SOLID EARTH > GEODETICS

EARTH SCIENCE > SOLID EARTH > TECTONICS > EARTHQUAKES

High frame rate camera

megathrust

Rubber

Sand > Quartz Sand

Subduction box

tectonic and structural features

tectonic process > subduction

tectonic setting > plate margin setting > active continental margin setting

tectonic setting > plate margin setting > subduction zone setting

Time lapse camera

Corresponding MSL vocabulary keywords

high frame rate camera

subducting plate interface

thrust fault

natural rubber

subduction box

camera

MSL enriched keywords

Ancillary equipment

model surface monitoring (2D)

camera

high frame rate camera

tectonic plate boundary

convergent tectonic plate boundary

subduction

subducting plate interface

tectonic deformation structure

tectonic fault

thrust fault

analogue modelling material

elastic modelling material

natural elastic material

natural rubber

Apparatus

analogue modelling

deformation experiments

subduction box

Software

digital image correlation (DIC)

accretionary wedge

MSL enriched sub domains i

analogue modelling of geologic processes

Source

https://dataservices.gfz-potsdam.de/panmetaworks/showshort.php?id=escidoc:5041892

Source publisher

GFZ Data Services