Boore and Atkinson 2008

class openquake.hazardlib.gsim.boore_atkinson_2008.BooreAtkinson2008

Implements GMPE developed by David M. Boore and Gail M. Atkinson and published as “Ground-Motion Prediction Equations for the Average Horizontal Component of PGA, PGV, and 5%-Damped PSA at Spectral Periods between 0.01 and 10.0 s” (2008, Earthquake Spectra, Volume 24, No. 1, pages 99-138).

COEFFS = <openquake.hazardlib.gsim.base.CoeffsTable object>

Coefficient table is constructed from values in tables 6, 7 and 8 (pages 119, 120, 121). Spectral acceleration is defined for damping of 5%, see ‘Response Variables’ page 100. c1, c2, c3, h are the period-dependent distance scaling coefficients. e1, e2, e3, e4, e5, e6, e7, Mh are the period-dependent magnitude- sigma, tau, std are the intra-event uncertainty, inter-event uncertainty, and total standard deviation, respectively. Note that only the inter-event and total standard deviation for ‘specified’ fault type are considered (because rake angle is always specified)

COEFFS_SOIL_RESPONSE = <openquake.hazardlib.gsim.base.CoeffsTable object>

Table 3, pag. 110. + coefficient values for additional frequencies extracted from Fortran code implementing soil response function developed by the original author (ab06_fmrvs_evaluate_gmpes.for available at http://www.daveboore.com/pubs_online.html - see code available for Atkinson, G. M. and D. M. Boore (2006). Earthquake ground -motion prediction equations for eastern North America)

DEFINED_FOR_INTENSITY_MEASURE_COMPONENT = 'Average Horizontal (GMRotI50)'

Supported intensity measure component is orientation-independent measure GMRotI50, see paragraph ‘Response Variables’, page 100 and table 8, pag 121.

DEFINED_FOR_INTENSITY_MEASURE_TYPES = set([<class 'openquake.hazardlib.imt.PGV'>, <class 'openquake.hazardlib.imt.SA'>, <class 'openquake.hazardlib.imt.PGA'>])

Supported intensity measure types are spectral acceleration, peak ground velocity and peak ground acceleration, see table 3 pag. 110

DEFINED_FOR_STANDARD_DEVIATION_TYPES = set(['Total', 'Inter event', 'Intra event'])

Supported standard deviation types are inter-event, intra-event and total, see equation 2, pag 106.

DEFINED_FOR_TECTONIC_REGION_TYPE = 'Active Shallow Crust'

Supported tectonic region type is active shallow crust, see paragraph ‘Introduction’, page 99.

REQUIRES_DISTANCES = set(['rjb'])

Required distance measure is Rjb. See paragraph ‘Predictor Variables’, pag 103

REQUIRES_RUPTURE_PARAMETERS = set(['rake', 'mag'])

Required rupture parameters are magnitude, and rake. See paragraph ‘Predictor Variables’, pag 103

REQUIRES_SITES_PARAMETERS = set(['vs30'])

Required site parameters is Vs30. See paragraph ‘Predictor Variables’, pag 103

get_mean_and_stddevs(sites, rup, dists, imt, stddev_types)

See superclass method for spec of input and result values.