Interactive Time-Dependent Seismic Hazard Assessment with SHAppE

The Seismic Hazard Parameters Evaluation (SHAPE) toolbox (Leptokaropoulos and Lasocki, SRL, 2020, https://doi.org/10.1785/0220190319) has evolved into SHAppE, an interactive MATLAB app. SHAppE facilitates probabilistic assessment of seismic hazard parameters, including the mean return period (MRP) and exceedance probability (EP) of earthquake magnitudes, along with confidence intervals. Its interactive features support real-time analysis and visualization, making it suitable for researchers and practitioners analyzing time-dependent seismicity, such as aftershocks, stress triggering, and seismicity induced by human activities. 

SHAppE offers a graphical user interface (GUI) that simplifies parameter selection and data filtering, making it more accessible to users with limited programming experience. It supports four magnitude distribution models, the Unbounded and Truncated versions of the Gutenberg-Richter law and non-parametric Kernel density estimation. The app is demonstrated through case studies from regional datasets (e.g., Song Tranh 2 reservoir in Vietnam) and global catalogues (ISC), showcasing its utility in monitoring seismic responses and evaluating hazard mitigation measures. All input parameters, output data, and results are systematically archived to ensure thorough experiment tracking and facilitate reproducibility. SHAppE provides an intuitive platform, suitable for research and teaching time-dependent, probabilistic seismic hazard analysis.