Package gov.usgs.earthquake.nshmp.gmm

Class BooreEtAl_1997_Alaska

java.lang.Object
gov.usgs.earthquake.nshmp.gmm.BooreEtAl_1997_Alaska
All Implemented Interfaces:
GroundMotionModel
public class BooreEtAl_1997_Alaska extends Object implements GroundMotionModel
Alaska-specific implementation of the Boore, Joyner & Fumal (1997) ground motion model for shallow earthquakes in active continental crust. This implementation was created to match fortran implementation with custom coefficients for different tectonic settings and styles of faulting. It's not clear what the relationship between the published 'b1' coefficients is and the values included in the fortran input files. This implementation is only for soft rock sites (Vs30 = 760 m/s).

Component: random horizontal

Author:
U.S. Geological Survey
See Also:

  • Method Details

    • 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