Atkinson and Boore 2003¶

class
openquake.hazardlib.gsim.atkinson_boore_2003.
AtkinsonBoore2003SInter
[source]¶ Implements GMPE developed by G. M Atkinson and D. Boore and published as “Empirical GroundMotion Relations for SubductionZone Earthquakes and Their Application to Cascadia and Other Regions” (Bulletin of the Seismological Society of America, Volume 93, Number 4, pages 17031929, 2003) and includes correction for subduction interface equations as described in “Erratum to ‘Empirical Ground Motion Relations for SubductionZone Earthquakes and their application to Cascadia and other regions’”, Gail M. Atkinson and David M. Boore, Volume 98, Number 5, pp.25672569, 2008. The class implements the global model but not the corrections for Japan/Cascadia. SA values at 4 s (not supported by the original equations) are obtained from mean value at 3 s divided by a factor equal to 0.550 (scaling factor computed in the context of the SHARE project and obtained as average ratio between median values at 4 and 3 seconds as predicted by SHARE subduction GMPEs). The class implements the equations for ‘Subduction Interface’ (that’s why the class name ends with ‘SInter’).

DEFINED_FOR_INTENSITY_MEASURE_COMPONENT
= 'Random horizontal'¶ Supported intensity measure component is the random horizontal

DEFINED_FOR_INTENSITY_MEASURE_TYPES
= set([<class 'openquake.hazardlib.imt.PGA'>, <class 'openquake.hazardlib.imt.SA'>])¶ Supported intensity measure types are spectral acceleration, and peak ground acceleration, see table 1, page 1715

DEFINED_FOR_STANDARD_DEVIATION_TYPES
= set(['Total', 'Inter event', 'Intra event'])¶ Supported standard deviation types are interevent, intraevent and total, see table 1, page 1715

DEFINED_FOR_TECTONIC_REGION_TYPE
= 'Subduction Interface'¶ Supported tectonic region type is subduction interface

REQUIRES_DISTANCES
= set(['rrup'])¶ Required distance measure is closest distance to rupture, see equation 1, page 1706

REQUIRES_RUPTURE_PARAMETERS
= set(['hypo_depth', 'mag'])¶ Required rupture parameters are magnitude and focal depth, see equation 1, page 1706

REQUIRES_SITES_PARAMETERS
= set(['vs30'])¶ Required site parameters is Vs30, used to distinguish between NEHRP soil classes, see paragraph ‘Functional Form’, page 1706

get_mean_and_stddevs
(sites, rup, dists, imt, stddev_types)[source]¶ See
superclass method
for spec of input and result values.


class
openquake.hazardlib.gsim.atkinson_boore_2003.
AtkinsonBoore2003SSlab
[source]¶ Implements GMPE developed by G. M Atkinson and D. Boore and published as “Empirical GroundMotion Relations for SubductionZone Earthquakes and Their Application to Cascadia and Other Regions” (Bulletin of the Seismological Society of America, Volume 93, Number 4, pages 17031929, 2003). The class implements the global model but not the corrections for Japan/Cascadia. SA values at 4 s (not supported by the original equations) are obtained from mean value at 3 s divided by a factor equal to 0.550 (scaling factor computed in the context of the SHARE project and obtained as average ratio between median values at 4 and 3 seconds as predicted by SHARE subduction GMPEs). The class implements the equations for ‘Subduction IntraSlab’ (that’s why the class name ends with ‘SSlab’).

DEFINED_FOR_TECTONIC_REGION_TYPE
= 'Subduction IntraSlab'¶ Supported tectonic region type is subduction interface

get_mean_and_stddevs
(sites, rup, dists, imt, stddev_types)[source]¶ See
superclass method
for spec of input and result values.


class
openquake.hazardlib.gsim.atkinson_boore_2003.
AtkinsonBoore2003SInterNSHMP2008
[source]¶ Extend
AtkinsonBoore2003SInter
and introduces site amplification for B/C site condition and fixed rupture hypocentral depth (20 km) as defined by the National Seismic Hazard Mapping Project (NSHMP) for the 2008 US hazard modelSite amplification for B/C is triggered when vs30 > 760 and it is computed as site amplification for C soil scaled by a factor equal to 0.5
The class implements the equation as coded in
subroutine getABsub
inhazSUBXnga.f
Fortran code available at: http://earthquake.usgs.gov/hazards/products/conterminous/2008/software/
get_mean_and_stddevs
(sites, rup, dists, imt, stddev_types)[source]¶ See
superclass method
for spec of input and result values.Call super class method with hypocentral depth fixed at 20 km


class
openquake.hazardlib.gsim.atkinson_boore_2003.
AtkinsonBoore2003SSlabNSHMP2008
[source]¶ Extend
AtkinsonBoore2003SSlab
and introduces site amplification for B/C site condition as defined by the National Seismic Hazard Mapping Project (NSHMP) for the 2008 US hazard model.Site amplification for B/C is triggered when vs30 > 760 and it is computed as site amplification for C soil scaled by a factor equal to 0.5
The class replicates the equation as coded in
subroutine getABsub
inhazgridXnga2.f
Fortran code available at: http://earthquake.usgs.gov/hazards/products/conterminous/2008/software/

class
openquake.hazardlib.gsim.atkinson_boore_2003.
AtkinsonBoore2003SSlabCascadiaNSHMP2008
[source]¶ Extend
AtkinsonBoore2003SSlabNSHMP2008
but uses coefficients for Cascadia regionThe class replicates the equation as coded in
subroutine getABsub
inhazgridXnga2.f
Fortran code available at: http://earthquake.usgs.gov/hazards/products/conterminous/2008/software/