# Atkinson 1997 Intensity Model

## Class Name

• RAtkinson1997IntensityModel

## Location in Objects Pane

• Models > Model > Hazard > Earthquake > Intensity > Atkinson 1997 Intensity

## Model Description

### Model Form

• This model produces the spectral acceleration or the peak ground acceleration at specified locations for given magnitude and hypocenter location of several earthquake sources as input, based on the Atkinson-Boore (1997) attenuation relation.

• No

## Properties

### Object Name

• Name of the object in Rt
• Allowable characters are upper-case and lower-case letters, numbers, and underscore (“_”).
• The name is unique and case-sensitive.

### Display Output

• Determines whether the model is allowed to print messages to the Output Pane.

### Period Parameter List

• List of the natural periods at which the intensity is evaluated

### Magnitude

• Magnitudes of various earthquake sources

### Hypocentre Location

• Hypocenter locations of earthquake sources, which will automatically yield the radius $${R}$$ to the various output locations.

### Soil Type

• The type of soil that can be "Rock" or "FirmSoil"

### Epsilon

• $${\varepsilon}$$ = Model error, typically a standard normal random variable

### Structure Location List

• List of the locations where the intensity will be computed at them (the output will give as many intensity values as the locations provided here)

### C 0 Uncertainty

• The coefficient of quadratic equations that approximate the estimates for the purpose of seismic hazard calculations.

### C 1 Uncertainty

• The coefficient of quadratic equations that approximate the estimates for the purpose of seismic hazard calculations.

### C 2 Uncertainty

• The coefficient of quadratic equations that approximate the estimates for the purpose of seismic hazard calculations.

### C 3 Uncertainty

• The coefficient of quadratic equations that approximate the estimates for the purpose of seismic hazard calculations.

### C a3 Uncertainty

• Correction factor based on empirical analysis results

### C a4 Uncertainty

• Correction factor based on empirical analysis results

### Csigma Uncertainty

• The standard deviation of model error

### Cs Uncertainty

• Soil factor correction

## Output

• Earthquake intensities (as many as the locations provided in the input)
• The output is an automatically generated generic response object, which takes the object name of the model plus “Response”.