gov.usgs.earthquake.nshmp.gmm

Class AtkinsonMacias_2009

java.lang.Object

gov.usgs.earthquake.nshmp.gmm.AtkinsonMacias_2009

All Implemented Interfaces:

GroundMotionModel

public class AtkinsonMacias_2009
extends Object
implements GroundMotionModel

Implementation of the subduction interface ground motion model by Atkinson & Macias (2009). This implementation matches that used in the 2014 USGS NSHMP.

Note: Direct instantiation of GroundMotionModels is prohibited. Use Gmm.instance(Imt) to retrieve an instance for a desired Imt.

Implementation notes:

• NSHM fortran implementation converts 0.13Hz to 7.7s; this implementation uses 7.5s instead.
• Model uses a magnitude dependent depth term and so does not impose 20km hypocentral depth as other subduction interface models do.
• Support for spectral period 0.01s is provided using the same coefficients as PGA.
• Support for spectral periods 0.02s, 0.03s, 0.075s, 0.15s, 0.25s, and 1.5s is provided via interpolation of ground motion and sigma of adjacent periods for which there are coefficients.

Reference: Atkinson, G.M. and Macias, D.M., 2009, Predicted ground motions for great interface earthquakes in the Cascadia subduction zone: Bulletin of the Seismological Society of America, v. 99, p. 1552-1578.

doi: 10.1785/0120080147

Component: geometric mean of two horizontal components

Author:

Peter Powers

See Also:

Gmm.AM_09_INTERFACE, Gmm.AM_09_INTERFACE_BASIN_AMP

Method Summary

Modifier and Type	Method and Description
ScalarGroundMotion	calc(GmmInput in) Compute the scalar ground motion and its standard deviation for the supplied arguments.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

calc

public final ScalarGroundMotion calc(GmmInput in)

Description copied from interface: GroundMotionModel

Compute the scalar ground motion and its standard deviation for the supplied arguments.

Specified by:

calc in interface GroundMotionModel

Parameters:

in - a ground motion model input argument container

Returns:

a scalar ground motion wrapper