Moment Magnitude Model

Class Name

• RMomentMagnitudeModel

Location in Objects Pane

• Models > Model > Hazard > Earthquake > Magnitude > Moment Magnitude

Model Description

Model Form

$$M = {\vartheta _1} \cdot {\log _{10}}(G \cdot A \cdot D \cdot {10^7}) - {\vartheta _2} + \varepsilon $$ where \({G}\)∙\({A}\)∙\({D}\)∙\({10^7}\) = seismic moment

DDM sensitivities

• Yes

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.

Shear Modulus

• \({G}\) = Shear modulus which is typically set as 30.109 N/m²

Rupture Area

• \({A}\) = Rupture area in m²

Rupture Displacement

• \({D}\) = Rupture displacement in m

Theta1

• \({\vartheta _ 1}\) = Model parameter which is typically set as 2/3.

Theta2

• \({\vartheta _ 2}\) = Model parameter which is typically set as 10.7.

Epsilon

• \({\varepsilon}\) = Model error

Output

• \({M}\) = Magnitude
• The output is an automatically generated generic response object, which takes the object name of the model plus “Response”.

Right-click Menu

Remove

• Removes the object.