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25 results for “megathrust”
Documentation and digital files in support of "Aftershock regions of Aleutian–Alaska megathrust earthquakes, 1938–2021" by Carl Tape and Anthony Lomax: Parts B, C, and D
<p>These files support a manuscript to be submitted entitled "Aftershock regions of Aleutian–Alaska megathrust earthquakes, 1938-2021," by Carl Tape and Anthony Lomax. This collection contains Parts B, C, and D. A separate collection contains Part A. This research was supported by the U.S. Geological Survey (USGS), Department of the Interior, under USGS award number G19AP00050.</p>
Forearc faults in northern Cascadia do not accommodate elastic strain driven by the megathrust seismic cycle: Dataset
<p>Input files and codes for Harrichhausen, N., Morell, K.D., Regalla, C. Inner forearc faults in northern Cascadia do not accommodate elastic strain driven by the megathrust seismic cycle. Submitted to Seismica. 2024.</p> <p>See Readme.md for more information</p> <p>Version 1.1: Updated author list and funding information.</p> <p>Version 1.2: Updated matlab codes to work on Mac.</p>
Documentation and digital files in support of "Aftershock regions of Aleutian–Alaska megathrust earthquakes, 1938-2021" by Carl Tape and Anthony Lomax: Part A
<p>These files support a paper entitled "Aftershock regions of Aleutian–Alaska megathrust earthquakes, 1938–2021," by Carl Tape and Anthony Lomax, published in Journal of Geophysical Research Solid Earth. This collection contains Part A. A separate collection contains Parts, B, C, and D. This research was supported by the U.S. Geological Survey (USGS), Department of the Interior, under USGS award number G19AP00050.</p>
Aftershock regions of Aleutian–Alaska megathrust earthquakes: digital files
<p>These files support a published manuscript entitled "Aftershock regions of Aleutian–Alaska megathrust earthquakes, 1938-2021," by Carl Tape and Anthony Lomax. A subset of these files is also available within the online supplement of the published manuscript. This research was supported by the U.S. Geological Survey (USGS), Department of the Interior, under USGS award number G19AP00050.</p>
Data for megathrust earthquakes (1)
<p>Waveform data and hypocenter data of the megathrust earthquakes used in the analysis are included. 'wv.dat' contains vertical, north-south, east-west components and 'tr.dat' contains transverse components. 'hypo_thrust_wv.dat' contains the hypocentral data used for waveform analysis from the catalogue of the Japan Meteorological Agency.</p> <p> </p> <p>Waveform data was recorded at MeSO-net stations maintained by the National Research Institute for Earth Science and Disaster Prevention (Sakai and Hirata, 2009; Aoi et al., 2021; National Research Institute for Earth Science and Disaster Resilience, 2021).</p>
Modeling subduction megathrust earthquake cycle: Insights from a visco-elasto-plastic analog model
<p><strong>The dataset :</strong><br> The directory DATASET.zip provides data from subduction megathrust earthquake cycle analog experiments and results described in Caniven and Dominguez (2020). The data set contains all files for displacement fields (*.grd), time series of geodetic displacement (img_dcumul*.txt) and cumulative fault slip (profil*.gmt) and a spreadsheet file (*.numbers) used in plots of Figure 3 to Figure 10 in the paper. For each figure directory, we provide an example of script (SCRIPT_gmt*.txt) that can be used to display the data using the GMT software (Global Mapping Tools). The provided scripts have been developped to be used with GMT 5.4.4. The use of other versions may require some adjustments. See header of scripts for details.</p> <p><strong>The supporting movies :</strong><br> The Movies S1 and S2 show more complete records of experiments performed at two different tectonic loading rates. They corresponds to experiments analyzed in Figure 9 of the paper. Movies S1 is the "slow" experiment and Movies S2 is the "fast" one. The time-step is 5 seconds. All components of displacements field are plotted with associated profiles.</p> <p><strong>The analog model :</strong><br> The analog model reproduces subduction earthquake cycles using a multi-layered visco-elasto-plastic rheology. This includes the ductile mantle wedge with the overlying elastic part of the lithospheric plate and a subducting elastic oceanic crust. The frictional properties along the seismogenic zone favor stick-slip behavior from the trench to the brittle-ductile transition zone beyond which stable creep is dominant. Interseismic, coseismic and postseismic phases, including after-slip and viscoelastic relaxation are well reproduced. The model generates a wide range of slip events from creep to slow-slip events to earthquakes. Results reveals that the loading rate significantly controls fault slip stability by acting on the brittle-ductile coupling and the elastic strain energy stored during the interseismic stage. Slip properties depends also on the mean normal stress imposed along the fault zone. Finally, isolated and precursory slow-slip events are observed before the dynamic failure. The fault geometrical complexity is favored to explain the richness of the observed slip behavior.</p>
Data sets for: Diverse slip behavior of the Banyak Islands sub-segment of the Sunda megathrust in Sumatra, Indonesia
<p>Data sets include:</p> <p>DatasetS1, coral measurements taken within the Banyak Islands from 2005 to 2010 </p> <p>DatasetS2, the slip distribution for the 2010 <em>M<sub>W</sub></em> 7.8 Banyak Islands earthquake</p>
Not all Heterogeneity is Equal: Length Scale of Frictional Property Variation as a control on Subduction Megathrust Sliding Behavior
<p>The folder SSS_Results.zip contains the following files:</p> <p>1) A .txt for each simulation that contains (1st column) simulated timestep in seconds; (2nd column) maximum slip velocity at each timestep in m/s; and (3rd column) maximum slip velocity taken from the center of the velocity-strengthening blocks in m/s at each time step.</p> <p>2) A .mat file for each simulation that contains the same output as the .txt file, and in addition a MATLAB structure 'p' that serves as an input file to run each simulation using RSFaultZ, found at <a href="https://github.com/rmskarbek/RSFaultZ">https://github.com/rmskarbek/RSFaultZ</a></p> <p>3) PartialStabilityData.mat - results from linear stability analysis.</p> <p>4) ReducedArchiveData.m, SSS_Fig3.m, SSS_Fig4.m - Three MATLAB scripts that will automatically generate figures 3 and 4 in the related paper. </p> <p>NOTE: SSS_Fig3.m uses a perceptually uniform color map that requires an additional MATLAB package: <a href="https://www.mathworks.com/matlabcentral/fileexchange/68546-crameri-perceptually-uniform-scientific-colormaps">https://www.mathworks.com/matlabcentral/fileexchange/68546-crameri-perceptually-uniform-scientific-colormaps</a></p> <p>For any additional information please do not hesitate to contact the corresponding author Rob Skarbek at rskarbek@psi.edu.</p> <p>Additional MATLAB scripts that will reproduce the simulations themselves can be found at <a href="https://github.com/rmskarbek/RSFaultZ/tree/main/examples/blocks">https://github.com/rmskarbek/RSFaultZ/tree/main/examples/blocks</a></p>
Large megathrust earthquakes tend to sustain an increasingly longer duration than expected
<p>This is the data used for the paper "Large megathrust earthquakes tend to sustain an increasingly longer duration than expected".</p>
SeisSol input files for the dynamic rupture scenarios based on the 2004 Sumatra-Andaman earthquake published in Madden et al. (2022) "The state of pore fluid pressure and 3D megathrust earthquake dynamics" JGR-Solid Earth
<p>This dataset contains the input files of the dynamic rupture scenarios from Madden, E. H., T. Ulrich and A.-A. Gabriel (2022), The State of Pore Fluid Pressure and 3-D Megathrust Earthquake Dynamics, Journal of Geophysical Research-Solid Earth, <a href="https://doi.org/10.1029/2021JB023382">https://doi.org/10.1029/2021JB023382</a>. (Earlier preprint available at: <a href="https://doi.org/10.1002/essoar.10508297.1">https://doi.org/10.1002/essoar.10508297.2</a>)</p> <p><strong>easi/yaml parameter files for the 6 scenarios studied: </strong><br> PAR_Sumatra_scen1new_gen.par, PAR_Sumatra_scen2new_gen.par, PAR_Sumatra_scen3new_gen.par, PAR_Sumatra_scen4new_gen.par, PAR_Sumatra_scen5new_gen.par, PAR_Sumatra_scen6new_gen.par</p> <p><strong>easi/yaml files setting initial on-fault friction, stress and pore fluid pressure conditions for the 6 scenarios studied: </strong>iniStress_Sumatra_scen1new.yaml, iniStress_Sumatra_scen2new.yaml, iniStress_Sumatra_scen3new.yaml, iniStress_Sumatra_scen4new.yaml, iniStress_Sumatra_scen5new.yaml, iniStress_Sumatra_scen6new.yaml<br> <br> <strong>easi/yaml file describing the rock elastic properties in all 6 scenarios:</strong> <br> matprops_Sumatra_2019_LVZ.yaml<br> <br> <strong>mesh file:</strong> <br> topo4_splays_fix9-14.1e6-28m.dtc1-v2-suma</p> <p> </p>
Supplementary Material to: A secondary zone of uplift measured after megathrust earthquakes: caused by early downdip afterslip?
<p>This archive contains supplementary material to the publication "A secondary zone of uplift measured after megathrust earthquakes: caused by early downdip afterslip?"</p> <p>This archive is divided into two folders. One contains scripts and parameterization used for our subduction zone toy models, input files for use with the Pylith software, and slip optimization utilities. A second folder contains scripts and parameterization for our study of the 2010 Mw8.8 Maule (Chile) earthquake. Note that slip optimization utilities rely on the use of the Classic Slip Inversion python library (https://github.com/jolivetr/csi).</p>
Displacement time series from Foamquake and Gelquake in single- and double asperity configurations: Supplementary material to "Scaled seismotectonic models of megathrust seismic cycles through the lens of dynamical system theory"
<p><span>This dataset includes displacement data from 4 experiments performed with Foamquake and Gelquake (Mastella et al. 2022, Corbi et al., 2013), two scaled seismotectonic models reproducing the megathrust seismic cycle running at the Laboratory of Experimental Tectonics LET (Univ. Roma Tre). These models enable the generation of hundreds of quasi-periodic cycles of stress accumulation and sudden release through the spontaneous nucleation of frictional instabilities within one or many analog seismic asperities. Models are monitored by the means of a high-resolution top-view monitoring camera acquiring images at 7.5 and 50 frames per second for Gelquake and Foamquake, respectively. This dataset has been created with particle image velocimetry (PIV, using MatPIV (Sveen 2004)) through the cross-correlation between consecutive images. The PIV provides us with velocity field time series. These are integrated to obtain displacement time series. From the whole model surface, in each experiment we selected data from a cross-section striking parallel to the trench and located at the downdip center of the asperities. Cross sections are discretized in 28 and 29 target points in Gelquake and Foamquake, respectively. </span></p> <p><span>Displacement time series have been normalized to zero mean and unit variance to ensure the same level of magnitude for comparison between different experiments. Linear and second order polynomial trends have been removed to make the stick-slip confined in a given range and avoid non-stationary behavior. Time series data are not passed through filters (e.g., smoothing or moving average).</span></p> <p><span>Filename informs about the nature of the analog upper plate (i.e., foam and gel) and geometrical configuration of asperities (i.e., mono and twin). Together with individual files for each experiment, this dataset includes a Matlab script (i.e., all_timeseries.m) that allows visualization of displacement time series from individual target points. </span></p> <p><span>This dataset is supplementary to the paper in SEISMICA "Scaled seismotectonic models of megathrust seismic cycles through the lens of dynamical system theory” by Corbi et al. (2024), where detailed descriptions of models and experimental results can be found.</span></p>
Impact of Upper-Plate Faulting on Megathrust Foreshocks: Insights from the 2014 Iquique Earthquake
<p>Data set from the work: <strong>Impact of Upper-Plate Faulting on Megathrust Foreshocks: Insights from the 2014 Iquique Earthquake</strong>. DOI:</p> <p>input_files.tar.gz contains all the files (params, mesh, fault geomtry) necessary to run the python codes that will create the in.param files to be run using UniCyclE.</p> <p>in-param-files.tar.gz contains the in.param, rfaults.flt.2d, volume.ned, volume.trv. All these files will be used to run UniCyclE for each mnodel.</p> <p>vel_SAM.dat are the coseismic displacement of the continuous GPS stations that captured the Mw8.1 2014 Iquique earthquake, relative to South America.</p> <p>20_temp.csv is the temperature model used to compute the thermally activated viscoelastic behavior in the continental and oceanic mantle using a power creep law. </p> <p>the grl_codes.zip contains all the data and a jupyter notebook to process the results from the model in the same way as it is done in the paper in Figure 3.</p>
Supplementary Dataset for "A new mechanical perspective on a shallow megathrust near-trench slip from the high- resolution fault model of the 2011 Tohoku-Oki earthquake"
<p>This dataset contains the results obtained by the analysis in this study, such as the digital data of the slip distribution and stress drop estimated by Kubota et al.(2022)</p>
Interseismic uplift of anticlines above the Rakhine-Bangladesh Megathrust from ALOS-2 InSAR
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Data from: Signatures of localization control transition between rupture styles on basaltic megathrusts
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Migrating shallow slow slip on the Nankai trough megathrust, captured by borehole observatories
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Videos of dynamic rupture in models of the 2004 Sumatra-Andaman earthquake published in Madden et al. (2022) "The state of pore fluid pressure and 3D megathrust earthquake dynamics" JGR-Solid Earth
<p>Videos of dynamic rupture from models based on the 2004 Sumatra-Andaman earthquake presented in Madden, E. H., T. Ulrich, A.-A. Gabriel (2022). The state of pore fluid pressure and 3D megathrust earthquake dynamics, Journal of Geophysical Research - Solid Earth, <a href="https://doi.org/10.1029/2021JB023382">https://doi.org/10.1029/2021JB023382</a>. (Previous preprint available at: <a href="https://doi.org/10.1002/essoar.10508297.1">https://doi.org/10.1002/essoar.10508297.2</a>.)</p> <p> </p>
Dataset for the "Widespread Aseismic Slip Along the Makran Megathrust Triggered by the 2013 Mw 7.7 Balochistan Earthquake" paper
<p>This dataset is used for the Widespread Aseismic Slip Along the Makran Megathrust Triggered by the 2013 Mw 7.7 Balochistan Earthquake paper. Containing the ascending and descending InSAR results processing by MintPy, and the processed observation and input files for BEAT.</p>
Repository for the codes and raw dataset used in the paper: Testing driving mechanisms of megathrust seismicity with Explainable Artificial Intelligence.
<p>This repository contains the codes/notebooks and raw dataset used in the paper:</p> <p>Testing driving mechanisms of megathrust seismicity with Explainable Artificial Intelligence. by Juan Carlos Graciosa, Fabio A. Capitanio, Adam Beall, Mitchell Hargreaves, Thyagarajulu Gollapalli, Titus Tang, Mohd Zuhair</p> <h3>xai-megathrust:</h3> <p>This directory contains the following:</p> <p>1. helper_pkg: Package containing helper routines used during the creation of grids.<br>2. in-data: Contains the processed but non-standardized features. Standardization is done during runtime.<br>3. ml4szeq: Main set of codes used in the study.<br>4. ntbk: Notebooks used in the study. This includes the sampling of the raw data into grids (0_grid_sampling.ipynb), creation of classification maps (1_make_classification_maps.ipynb), and the creation of LRP heatmaps (2_make_lrp_heatmaps.ipynb).<br>5. vis_pkg: Package used for creating maps</p> <p> </p> <h3>xai-megathrust-raw-data:</h3> <p>This contains the raw dataset. Here, the data prefix indicates the convergent region it is a part of and are as follows:</p> <p>1. alu: Alaska-Aleutians<br>2. cam: Central America<br>3. izu: Izu-Bonin-Mariana<br>4. ker: Tonga-Kermadec<br>5. kur: Japan-Kuriles-Kamchatka<br>6. ryu: Ryukyu-Nankai<br>7. sam: South America<br>8. sum: Southeast Asia </p> <p>This was adapted from the notation used by Hayes et al., 2018.</p>
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