Source code for openquake.hazardlib.scalerel.base

# -*- coding: utf-8 -*-
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (C) 2012-2018 GEM Foundation
#
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# by the Free Software Foundation, either version 3 of the License, or
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"""
Module :mod:`openquake.hazardlib.scalerel.base` defines abstract base
classes for :class:`ASR <BaseASR>`, :class:`MSR <BaseMSR>`,
:class:`ASRSigma <BaseASRSigma>`, and :class:`MSRSigma <BaseMSRSigma>`
"""
import abc


[docs]class BaseASR(metaclass=abc.ABCMeta): """ A base class for Area-Magnitude Scaling Relationship. Allows calculation of rupture magnitude from area. """
[docs] @abc.abstractmethod def get_median_mag(self, area, rake): """ Return median magnitude (Mw) given the area and rake. :param area: Area in square km. :param rake: Rake angle (the rupture propagation direction) in degrees, from -180 to 180. """
def __repr__(self): """ Returns the name of the class """ return "<%s>" % self.__class__.__name__
[docs]class BaseASRSigma(BaseASR, metaclass=abc.ABCMeta): """ Extend :class:`BaseASR` and allows to include uncertainties (sigma) in rupture magnitude estimation. """
[docs] @abc.abstractmethod def get_std_dev_mag(self, rake): """ Return the standard deviation on the magnitude. :param rake: Rake angle (the rupture propagation direction) in degrees, from -180 to 180. """
[docs]class BaseMSR(metaclass=abc.ABCMeta): """ A base class for Magnitude-Area Scaling Relationship. Allows calculation of rupture area from magnitude. """
[docs] @abc.abstractmethod def get_median_area(self, mag, rake): """ Return median area (in square km) from magnitude ``mag`` and ``rake``. To be overridden by subclasses. :param mag: Moment magnitude (Mw). :param rake: Rake angle (the rupture propagation direction) in degrees, from -180 to 180. """
def __eq__(self, other): """ Two instances of the same class are considered equal """ return self.__class__ is other.__class__ def __repr__(self): """ Returns the name of the class """ return "<%s>" % self.__class__.__name__
[docs]class BaseMSRSigma(BaseMSR, metaclass=abc.ABCMeta): """ Extends :class:`BaseMSR` and allows to include uncertainties (sigma) in rupture area estimation. """
[docs] @abc.abstractmethod def get_std_dev_area(self, mag, rake): """ Return the standard deviation of the area distribution given magnitude ``mag`` and rake. To be overridden by subclasses. :param mag: Moment magnitude (Mw). :param rake: Rake angle (the rupture propagation direction) in degrees, from -180 to 180. """