Source code for openquake.hmtk.faults.active_fault_model

# -*- coding: utf-8 -*-
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# D. Monelli.
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# Earthquake Model).
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'''
Module :mod:`openquake.hmtk.faults.active_fault_model.mtkActiveFaultModel`
implements a wrapper class for a set of active fault sources
'''
from copy import deepcopy
import numpy as np
from openquake.hazardlib.scalerel.wc1994 import WC1994
from openquake.hmtk.sources.source_model import mtkSourceModel


class mtkActiveFaultModel(object):
    '''
    Class to define a compilation of active fault sources

    :param str id:
        Identifier for the model
    :param str name:
        Fault model name
    :param list faults:
        Active faults as a list of tuples where each tuple is an instance
        of (openquake.hmtk.faults.fault_model.mtkActiveFault,
        [list of MFD configurations for that fault])
    :param source_model:
        Instance of openquake.hmtk.source.source_model.mtkSourceModel class
    '''

    def __init__(self, identifier=None, name=None, faults=None):
        '''
        '''
        self.id = identifier
        self.name = name
        if isinstance(faults, list):
            self.faults = faults
        else:
            if faults:
                raise ValueError('Faults must be input as list')
            else:
                self.faults = []
        self.source_model = None

    def get_number_faults(self):
        '''
        Returns the number of faults in the model
        '''
        return len(self.faults)

    def build_fault_model(self, collapse=False, rendered_msr=WC1994(),
                          mfd_config=None):
        '''
        Constructs a full fault model with epistemic uncertainty by
        enumerating all the possible recurrence models of each fault as
        separate faults, with the recurrence rates multiplied by the
        corresponding weights.

        :param bool collapse:
            Determines whether or not to collapse the branches
        :param rendered_msr:
            If the option is taken to collapse the branches then a recurrence
            model for rendering must be defined
        :param list/dict mfd_config:
            Universal list or dictionay of configuration parameters for the
            magnitude frequency distribution - will overwrite whatever is
            previously defined for the fault!
        '''
        self.source_model = mtkSourceModel(self.id, self.name)
        for fault in self.faults:
            fault.generate_recurrence_models(collapse,
                                             config=mfd_config,
                                             rendered_msr=rendered_msr)
            src_model, src_weight = fault.generate_fault_source_model()
            for iloc, model in enumerate(src_model):

                new_model = deepcopy(model)
                new_model.id = str(model.id) + '_%g' % (iloc + 1)
                new_model.mfd.occurrence_rates = \
                    (np.array(new_model.mfd.occurrence_rates) *
                     src_weight[iloc]).tolist()
                self.source_model.sources.append(new_model)