Category: Ground Motion

The sandbox modules on this page are designed to allow users to define crustal earthquake scenarios worldwide to conduct ground motion (GM) analysis at their sites of interest. The practical applications of this capability are: Two modules are designed to achieve the objectives: The impacts of different tectonic environments on earthquakes GMs are accommodated by…

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The following briefly discusses conducting ground motion analysis for a user-defined earthquake scenario. This page is reached after a user registers a fault database with the program and defines an earthquake scenario using a combination of the registered segments. The GM analysis program and the page are designed to conduct ground motion for sites defined…

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Following are brief discussions on the functional forms of items in equation 1 of Earthquake Ground Motion and Response Spectral Analysis Source Function \(F_{src}(M_0,f)\): The far field, i.e. far enough from the rupture area that the rupture details can be characterized in a simple functional form, source displacement spectrum is often formulated as $$F_{src}=\frac{C*M_0}{1+{(f/f_0)}^2}…(2)$$ where…

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Accurately estimating earthquake ground motions and response spectra is a fundamental part of earthquake hazard analysis. Over the past several decades, engineering seismologists have developed a variety of physical and empirical models to support this task. These models are known as ground‑motion prediction equations (GMPEs). Although widely used in practice, GMPEs are often mathematically and…

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