AbrahamsonEtAl_2014 (nshmp-lib)

java.lang.Object
- gov.usgs.earthquake.nshmp.gmm.AbrahamsonEtAl_2014

All Implemented Interfaces:

GroundMotionModel
```
public class AbrahamsonEtAl_2014
extends Object
implements GroundMotionModel
```
Implementation of the Abrahamson, Silva & Kamai (2014) next generation ground motion model for active crustal regions developed as part of NGA West II.
For the 2023 NSHM, implementations were added that support CyberShake informed modifications to basin amplification terms. This is a region-specific behavior and is managed through the use of a gmm-region defined in the data/site directory of recent nshm-conus models.
Note: Direct instantiation of GroundMotionModels is prohibited. Use Gmm.instance(Imt) to retrieve an instance for a desired Imt.
Reference: Abrahamson, N.A., Silva, W.J., and Kamai, R., 2014, Summary of the ASK14 ground-motion relation for active crustal regions: Earthquake Spectra, v. 30, n. 3, p. 1025-1055.
doi: 10.1193/070913EQS198M
Component: RotD50 (average horizontal)

Author:

U.S. Geological Survey

See Also:

Gmm.ASK_14_BASE, Gmm.ASK_14, Gmm.ASK_14_BASIN, Gmm.ASK_14_CYBERSHAKE, Gmm.ASK_14_VS30_MEASURED, Gmm.ASK_14_PRVI

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