# -*- coding: utf-8 -*-
# vim: tabstop=4 shiftwidth=4 softtabstop=4
#
# LICENSE
#
# Copyright (C) 2010-2023 GEM Foundation, G. Weatherill, M. Pagani,
# D. Monelli.
#
# The Hazard Modeller's Toolkit 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.
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# along with OpenQuake. If not, see <http://www.gnu.org/licenses/>
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# DISCLAIMER
#
# The software Hazard Modeller's Toolkit (openquake.hmtk) provided herein
# is released as a prototype implementation on behalf of
# scientists and engineers working within the GEM Foundation (Global
# Earthquake Model).
#
# It is distributed for the purpose of open collaboration and in the
# hope that it will be useful to the scientific, engineering, disaster
# risk and software design communities.
#
# The software is NOT distributed as part of GEM's OpenQuake suite
# (https://www.globalquakemodel.org/tools-products) and must be considered as a
# separate entity. The software provided herein is designed and implemented
# by scientific staff. It is not developed to the design standards, nor
# subject to same level of critical review by professional software
# developers, as GEM's OpenQuake software suite.
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# Feedback and contribution to the software is welcome, and can be
# directed to the hazard scientific staff of the GEM Model Facility
# (hazard@globalquakemodel.org).
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# The Hazard Modeller's Toolkit (openquake.hmtk) is therefore distributed
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"""
:mod:`openquake.hmtk.regionalisation.tectonic_regionalisation` implements
:class:`openquake.hmtk.ancillary.tectonic_regionalisation.TectonicRegion`,
defining the methods and attributes associated with a region, and the
:class:`openquake.hmtk.ancillary.tectonic_regionalisation.TectonicRegionalisation` defining a regionalisation as a set of regions
"""
from math import fabs
import numpy as np
from openquake.hazardlib.scalerel.wc1994 import WC1994
DEFAULT_SHEAR_MODULUS = [(30.0, 1.0)]
DEFAULT_DLR = [(1.25e-5, 1.0)]
DEFAULT_MSR = [(WC1994(), 1.0)]
def _check_list_weights(parameter, name):
"""
Checks that the weights in a list of tuples sums to 1.0
"""
if not isinstance(parameter, list):
raise ValueError("%s must be formatted with a list of tuples" % name)
weight = np.sum([val[1] for val in parameter])
if fabs(weight - 1.0) > 1e-8:
raise ValueError("%s weights do not sum to 1.0!" % name)
return parameter
[docs]class TectonicRegion(object):
"""
Definition of the tectonic region
"""
def __init__(
self,
identifier,
name,
shear_modulus=None,
disp_length_ratio=None,
scaling_rel=None,
):
shear_modulus = shear_modulus or DEFAULT_SHEAR_MODULUS
disp_length_ratio = disp_length_ratio or DEFAULT_DLR
scaling_rel = scaling_rel or DEFAULT_MSR
self.id = identifier
self.region_name = name
self.shear_modulus = _check_list_weights(
shear_modulus, "Shear Modulus " + self.region_name
)
self.disp_length_ratio = _check_list_weights(
disp_length_ratio,
"Displacement to Length Ratio " + self.region_name,
)
self.scaling_rel = _check_list_weights(
scaling_rel, "Scaling Relation " + self.region_name
)
[docs]class TectonicRegionalisation(object):
"""
Defines a set of regionalisations
"""
def __init__(self):
""" """
self.regionalisation = []
self.key_list = []
[docs] def populate_regions(self, tectonic_region_dict):
"""
Populates the tectonic region from the list of dictionaries, where each
region is a dictionary of with the following format::
region = {'Shear_Modulus': [(val1, weight1), (val2, weight2), ...],
'Displacement_Length_Ratio': [(val1, weight1), ...],
'Magnitude_Scaling_Relation': [(val1, weight1), ...]}
"""
for tect_reg in tectonic_region_dict:
if "Shear_Modulus" in tect_reg.keys():
shear_modulus = tect_reg["Shear_Modulus"]
else:
shear_modulus = DEFAULT_SHEAR_MODULUS
if "Displacement_Length_Ratio" in tect_reg.keys():
disp_length_ratio = tect_reg["Displacement_Length_Ratio"]
else:
disp_length_ratio = DEFAULT_DLR
if "Magnitude_Scaling_Relation" in tect_reg.keys():
scaling_relation = tect_reg["Magnitude_Scaling_Relation"]
else:
scaling_relation = DEFAULT_MSR
self.regionalisation.append(
TectonicRegion(
tect_reg["Code"],
tect_reg["Name"],
shear_modulus,
disp_length_ratio,
scaling_relation,
)
)
self.key_list.append(tect_reg["Name"])
[docs] def get_number_regions(self):
"""
Returns the number of tectonic regions in a regionalisation
"""
return len(self.key_list)
