High-Rate GNSS Analysis of the Onset, Growth, and Termination of Slow Slip Events and their Along-Dip Variability Offshore the Boso Peninsula, Japan (2011–2024)

This repository contains GNSS-based analysis products used to investigate the spatiotemporal evolution of slow slip events (SSEs) offshore the Boso Peninsula, Japan. The dataset includes results from change-point analysis, Bayesian fault slip inversion, and derived moment rate functions for four SSEs (2011, 2013–2014, 2018, and 2024). Each archive is described below. delta.zip:Delta (slope change) values from change-point analysis of GNSS time series. For each GNSS station, this dataset includes the three largest negative and positive slope changes (delta values), corresponding to candidate start and end times of slow slip events (SSEs), respectively. The analysis follows the Prophet-based modular regression. Data are provided for four SSEs (2011, 2013–2014, 2018, and 2024) offshore the Boso Peninsula, including timestamps and associated delta values for all stations. fault.zip:Time-dependent fault slip models and associated displacement fields. This archive contains the spatiotemporal inversion results for four slow slip events (SSEs) offshore the Boso Peninsula (2011, 2013–2014, 2018, and 2024). The results are provided for all 50 time periods derived from change-point analysis of high-rate GNSS data. For each time period, observed horizontal GNSS displacements, predicted displacements from the inversion model, and estimated fault slip distribution on the subfault grid. The exact time windows for the 50 time periods are provided in period.txt for each event, which lists the start and end times of each period. All displacement and slip values are given in meters (m). mrate.zip:Estimated moment rate evolution of slow slip events. This archive contains the estimated moment rate functions associated with four slow slip events (SSEs) offshore the Boso Peninsula (2011, 2013–2014, 2018, and 2024). For each event, the dataset provides the temporal evolution of seismic moment release derived from the time-dependent fault slip estimated by Bayesian inversion.All moment rate values are expressed in Nm/day.