TECTONIC MODEL-BASED CRITIQUE ON CONVENTIONALSEISMIC HAZARD EVALUATIONS

This study introduces a new approach to defining earthquake sources and segmentation, providinga practical guideline for evaluating earthquake occurrences. This evaluation model is backed bygeological evidence that forms a crucial component of Probabilistic Seismic Hazard Assessment(PSHA) and Deterministic Seismic Hazard Analysis (DSHA) programs. The evidence encompassesthe locations and types of earthquakes with long recurrence intervals spanning thousands of years,which may not be well-represented in historical, geodetic, or seismic records covering hundreds tothousands of years. The tectonic model's key output is the segmentation of fault zones responsible forearthquakes, some of which could be blind faults or faults yet to be identified as active faults. Theseregions might be regarded as aseismic areas in conventional seismic evaluations. The studyrecommends distinguishing between seismic hazard and seismic risk maps in regions where thepotential for seismic activity is the same but the population densities differ. This differentiation canhelp tailor mitigation strategies and preparedness efforts based on specific risk profiles

کلیدواژه ها:

Tectonic Model ، Seismicity ، Zipper tectonics ، Segmentation