Source code for openquake.hazardlib.scalerel.strasser2010

# -*- coding: utf-8 -*-
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"""
Module :mod:`openquake.hazardlib.scalerel.strasser2010` implements
:class:`StrasserInterface`, :class:`StrasserIntraslab`.

"""
from math import log10
from openquake.hazardlib.scalerel.base import BaseMSRSigma, BaseASRSigma


[docs]class StrasserInterface(BaseMSRSigma, BaseASRSigma): """ Strasser, Arango and Bommer magnitude -- rupture area relationships for interface events. See F. O. Strasser, M. C. Arango, and J. J. Bommer Scaling of the Source Dimensions of Interface and Intraslab Subduction-zone Earthquakes with Moment Magnitude Seismological Research Letters, November/December 2010, v. 81, p. 941-950, doi:10.1785/gssrl.81.6.941 Implements both magnitude-area and area-magnitude scaling relationships. """
[docs] def get_median_area(self, mag, rake): """ Calculates median areas as `10** (a + b*mag)`. The values are a function of magnitude. Rake is ignored. """ return 10 ** (-3.476 + 0.952 * mag)
[docs] def get_std_dev_area(self, mag, rake): """ Standard deviation for Strasser et al 2010. Magnitude is ignored. """ return 0.304
[docs] def get_median_mag(self, area, rake): """ Return magnitude (Mw) given the area Rake is ignored. :param area: Area in square km. """ return 4.441 + 0.846 * log10(area)
[docs] def get_std_dev_mag(self, rake): """ Standard deviation on the magnitude for the Strasser et al. (2010) area relation. """ return 0.286
[docs]class StrasserIntraslab(BaseMSRSigma, BaseASRSigma): """ Strasser, Arango and Bommer magnitude -- rupture area relationships for intraslab events. See F. O. Strasser, M. C. Arango, and J. J. Bommer Scaling of the Source Dimensions of Interface and Intraslab Subduction-zone Earthquakes with Moment Magnitude Seismological Research Letters, November/December 2010, v. 81, p. 941-950, doi:10.1785/gssrl.81.6.941 Implements both magnitude-area and area-magnitude scaling relationships. """
[docs] def get_median_area(self, mag, rake): """ Calculates median areas as `10** (a + b*mag)`. The values are a function of magnitude. Rake is ignored. """ return 10 ** (-3.225 + 0.89 * mag)
[docs] def get_std_dev_area(self, mag, rake): """ Standard deviation for Strasser et al 2010. Magnitude is ignored. """ return 0.184
[docs] def get_median_mag(self, area, rake): """ Return magnitude (Mw) given the area Rake is ignored. :param area: Area in square km. """ return 4.054 + 0.981 * log10(area)
[docs] def get_std_dev_mag(self, rake): """ Standard deviation on the magnitude for the Strasser et al. (2010) area relation. """ return 0.193