Geodetic Data and Models for "Bayesian Inference of Fault Slip Heterogeneity and Overlap: Application to the 2019 Ridgecrest Earthquakes and Afterslip"

This repository contains geodetic datasets and model-related files used for the co- and post-seismic inversions of the 2019 Ridgecrest earthquake sequence. The dataset includes (1) InSAR and GNSS measurements, and associated uncertainties, (2) posterior mean slip models for earthquake and afterslip derived from BUR and BR approaches, and (3) the full ensemble of BUR posterior model samples. 1. Geodetic Data Ridgecrest_Coseismic_Data.mat contains the coordinates, displacements, and uncertainty covariance matrices for downsampled SAR and GNSS data in a MATLAB struct file. Ridgecrest_Coseismic_Data.<dataset>.<variable> <dataset> includes CSKA1, CSKA2, CSKD, SenA64, SenD71, GPS <variable> includes: lonlat - Longitude/latitude coordinates (deg) XY - UTM coordinates (km) relative to a reference point [−117.4580, 35.7085] def - SAR LOS displacement or GNSS E/N/U displacements los - LOS projection unit vector Cd - Observational uncertainty covariance Cp - Model prediction uncertainty covariance from the final sampling stage CX - Combined observational and model uncertainty covariance Ridgecrest_Postseismic_Data.mat contains the coordinates, displacements, and uncertainty covariance matrices (only Cd) for 0.25-year postseismic downsampled SAR and GNSS data in a MATLAB struct file. Ridgecrest_Postseismic_Data.<dataset>.<variable> <dataset> includes SenA, SenD, GPS <variable> includes lonlat, XY, def, los, Cd 2. Fault Slip Models Fault parameters: The fault model comprises six sub-faults, discretized into 217 rectangular patches. Coseismic slip models (strike-slip and dip-slip components) have 434 parameters. The afterslip model (only strike-slip) has 217 parameters. Posterior mean models: CO_AF_slip_models.txt contains the fault slip model. Each row records the geometry and slip information for each patch in columns: Columns 1–3: Longitude, latitude, and depth (km) at the center of the patch Columns 4–5: Strike and dip angle (deg) Columns 6–7: Patch length and width (km) Columns 8–9: BUR model posterior mean slip (strike-slip and dip-slip, m) Columns 10–11: BR model posterior mean slip (strike-slip and dip-slip, m) Columns 12–13: Cumulative afterslip at 0.25 years from the BUR and BR models (strike-slip only, m) Full posterior model ensemble: BUR_posterior/BUR_CO/step173: BUR coseismic slip model at the final stage (173) BUR_posterior/BUR_AS/step152: BUR afterslip model at the final stage (152) Each stage folder includes the following files: allsamples: 1000 posterior samples retained at the final stage. Each row contains comma-separated parameter values of each sample. covsmpl: The sample covariance matrix used to adapt the proposal distribution. PL.mat: Uncertainty-related quantities, including (Cp) and (CX) (only coseismic slip). postval: Posterior probability values associated with each sample. resmpl: Resampled ensemble used to mitigate weight degeneracy.