Source code for openquake.hazardlib.scalerel.base

# -*- coding: utf-8 -*-
# vim: tabstop=4 shiftwidth=4 softtabstop=4
#
# Copyright (C) 2012-2017 GEM Foundation
#
# OpenQuake is free software: you can redistribute it and/or modify it
# under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# OpenQuake is distributed in the hope that it will be useful,
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
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# along with OpenQuake. If not, see <http://www.gnu.org/licenses/>.

"""
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
from openquake.baselib.python3compat import with_metaclass


[docs]class BaseASR(with_metaclass(abc.ABCMeta)): """ A base class for Area-Magnitude Scaling Relationship. Allows calculation of rupture magnitude from area. """ @abc.abstractmethod
[docs] 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(with_metaclass(abc.ABCMeta, BaseASR)): """ Extend :class:`BaseASR` and allows to include uncertainties (sigma) in rupture magnitude estimation. """ @abc.abstractmethod
[docs] 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(with_metaclass(abc.ABCMeta)): """ A base class for Magnitude-Area Scaling Relationship. Allows calculation of rupture area from magnitude. """ @abc.abstractmethod
[docs] 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(with_metaclass(abc.ABCMeta, BaseMSR)): """ Extends :class:`BaseMSR` and allows to include uncertainties (sigma) in rupture area estimation. """ @abc.abstractmethod
[docs] 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. """