6a - Basics of PSHA

Understanding PSHA Calculations: A Step-by-Step Guide

In this video, we explore the details of Probabilistic Seismic Hazard Analysis (PSHA) calculations. Covering sections 6.1 through 6.8 of the textbook, we break down the important ingredients, including seismic source models and ground motion models, and how they fit together. Through examples, we demonstrate the relationships between inputs and outputs, along with the sensitivity of these calculations to various parameters. By the end, we construct hazard curves for different scenarios, providing a comprehensive understanding of PSHA fundamentals.

00:00 Introduction to PSHA Calculations
00:29 Ingredients of PSHA Calculations
01:07 Understanding the Hazard Calculation Formula
04:15 Simple Example: Single Rupture Scenario
09:24 Second Example: Multiple Rupture Scenarios
17:47 Third Example: Gutenberg-Richter Magnitudes
25:05 Summarizing PSHA Calculations

This video is based on material from the book “Seismic Hazard and Risk Analysis” by Jack Baker, Brendon Bradley, and Peter Stafford (Cambridge University Press, 2021).