GMPE Tables¶

class
openquake.hazardlib.gsim.gsim_table.
AmplificationTable
(amplification_group, magnitudes, distances)[source]¶ Class to apply amplification from the GMPE tables.
Attr shape: Shape of the amplification arrays as a tuple of (Number Distances, Number IMTs, Number Magnitudes, Number Amplification Levels) Attr periods: Spectral periods defined in table Attr mean: Amplification factors for the mean ground motion Attr sigma: List of modification factors for the standard deviation of ground motion Attr magnitudes: Magnitude values for the tables Attr distances: Distance values for the tables Attr parameter: Parameter to which the amplification applies. Must be an element inside the _slots_ defines in the :class: openquake.hazardlib. gsim.base.RuptureContext or the :class: openquake.hazardlib.gsim.base. SitesContext Attr values: Array of values to which each amplification table corresponds Attr element: Indicates if the amplification corresponds to a rupture attribute or a site attribute 
get_amplification_factors
(imt, sctx, rctx, dists, stddev_types)[source]¶ Returns the amplification factors for the given rupture and site conditions.
Parameters:  imt – Intensity measure type as an instance of the :class: openquake.hazardlib.imt
 sctx – Site parameters as instance of the :class: openquake.hazardlib.gsim.base.SitesContext
 rctx – Rupture parameters as instance of the :class: openquake.hazardlib.gsim.base.RuptureContext
 dists – Source to site distances (km)
 stddev_types – List of required standard deviation types
Returns:  mean_amp  Amplification factors applied to the median ground
motion
 sigma_amps  List of modification factors applied to the
standard deviations of ground motion


class
openquake.hazardlib.gsim.gsim_table.
GMPETable
(gmpe_table=None)[source]¶ Implements ground motion prediction equations in the form of a table from which the expected ground motion intensity levels and standard deviations are interpolated.
In a GMPE tables the expected ground motions for each of the IMTs over the range of magnitudes and distances are stored in an hdf5 file on the path specified by the user.
In this version of the GMPE the expected values are interpolated to the required IMT, magnitude and distance in three stages.
 Initially the correct IMT values are identified, interpolating in logTlogIML space between neighbouring spectral periods.
 The IML values are then interpolated to the correct magnitude using linearMlogIML space
 The IML values are then interpolated to the correct distance via linearDlinearIML interpolation