SadighEtAl_1997 (nshmp-lib)

java.lang.Object
- gov.usgs.earthquake.nshmp.gmm.SadighEtAl_1997

All Implemented Interfaces:

GroundMotionModel
```
public class SadighEtAl_1997
extends Object
implements GroundMotionModel
```
Implementation of the ground motion model for shallow crustal earthquakes by Sadigh et al. (1997). This implementation supports soil and rock sites, the cutoff for which is vs30=750 m/s. This model was also used for subduction interface sources in the 2007 Alaska NSHM, for which a custom magnitude saturation at M=8.5 was added.
Note: Direct instantiation of GroundMotionModels is prohibited. Use Gmm.instance(Imt) to retrieve an instance for a desired Imt.
Reference: Sadigh, K., Chang, C.-Y. , Egan, J.A., Makdisi, F., and Youngs, R.R., 1997, Attenuation relationships for shallow crustal earthquakes based on California strong motion data: Seismological Research Letters, v. 6, n. 1, p. 180-189.
doi: 10.1785/gssrl.68.1.180
Component: geometric mean of two horizontal components

Author:

U.S. Geological Survey

See Also:

Gmm.SADIGH_97

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`LogicTree<GroundMotion>`	`calc(GmmInput in)`	Computes a logic tree of scalar ground motions and standard deviations for the supplied arguments.
`Imt`	`imt()`	The intensity measure type (`IMT`) of this GMM instance.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface gov.usgs.earthquake.nshmp.gmm.GroundMotionModel
dampedCalc

- Method Detail
  - imt
```
public Imt imt()
```
    Description copied from interface: GroundMotionModel
    
    The intensity measure type (IMT) of this GMM instance.
    
    Specified by:
    
    imt in interface GroundMotionModel
  - calc
```
public LogicTree<GroundMotion> calc(GmmInput in)
```
    Description copied from interface: GroundMotionModel
    
    Computes a logic tree of scalar ground motions and standard deviations for the supplied arguments. This method is implemented by GMMs to provide the horizontal peak ground acceleration and (optionally) velocity (PGA, PGV) as well as 5% damped pseudo-spectral acceleration for periods between 0.01 s and 10 s. For most modern GMMs, ground motions are computed as the average horizontal component (RotD50) but many older GMMs use some other average horizontal measure (e.g. GMRotI50).
    
    Specified by:
    
    calc in interface GroundMotionModel
    
    Parameters:
    
    in - a ground motion model input argument container