Supporting Information and Data for "Influence of Glacial Isostatic Adjustment on Intraplate Stress and Seismicity in Eastern North America in the Presence of Pre-existing Weak Zones"

Description

This repository contains data associated with Hightower et al., 2025, Influence of Glacial Isostatic Adjustment on Intraplate Stress and Seismicity in Eastern North America in the presence of pre-existing Weak Zones, submitted for publication in Geochemistry, Geophysics, Geosystems.

Below is a brief description of the folders and files contained in this repository.

CitcomSVE_Inputs

This folder contains the ice model (ICE6G_1x1) and 3D viscosity structures needed to run the models in CitcomSVE-v.2.1. Please see the CitcomSVE documentation for a description of the input ice and viscosity formats.

Two versions of the viscosity are provided for each model, one on a 1x1 degree grid and the other on a higher resolution 0.25 degree grid. The 0.25 degree version needs to be run through format_visc_forCitcomSVE.py in the CitcomSVE code main directory to create an appropriately formatted text file that can be read into CitcomSVE. An example of such a formatted file is in the model_GIA_A1b folder (...visc3D_forCSVE.dat file). The model_GIA_A1 and model_GIA_A1b folders also contain higher resolution gridded regional viscosity grids that are used Figure 2.

CitcomSVE_Outputs

This folder contains the modeled stress data for each GIA model, including the full stress tensor, the principal stresses, Shmax directions and misfits to the WSM data, and second invariant of deviatoric stress magnitudes.

Files with 'TBS_model_[name]' in their filename contain the total stress values for the GIA model with the tectonic background stress (i.e. TBS stress tensor was added to the GIA stress tensor before computing and reporting the final derived stress variable). Files that do not include 'TBS' are for stresses from GIA only. The TBS stress data by itself can be found for corresponding models in the data repository for Hightower et al., 2024, doi:10.1029/2024GC011493.

Data

This folder contains the WSM stress data used in the analysis and other datasets (earthquake locations, 1D viscosity profiles, etc.) used in making the figures.

Figures

This folder contains subdirectories for each of the figures in the manuscript, which include the script used to produce the figure and any other files needed for the figure. Figure 6 also contains the files with the precomputed Coulomb failure stress for each fault in each seismic zone using the stress data from each model.

CitcomSVE-2.1-code-Sep23.tar

This is a copy of the CitcomSVE source code that was used in the study. It also contains pre- and post-processing scripts. 

Files

Additional details