Source code for openquake.hazardlib.source.non_parametric

# The Hazard Library
# Copyright (C) 2013-2017 GEM Foundation
# This program 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.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# GNU Affero General Public License for more details.
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <>.
Module :mod:`openquake.hazardlib.source.non_parametric` defines
import numpy
from openquake.hazardlib.source.base import BaseSeismicSource
from openquake.hazardlib.geo.surface.multi import MultiSurface
from openquake.hazardlib.geo.mesh import RectangularMesh
from openquake.hazardlib.source.rupture import \
from openquake.baselib.slots import with_slots

[docs]class NonParametricSeismicSource(BaseSeismicSource): """ Non Parametric Seismic Source explicitly defines earthquake ruptures in the constructor. That is earthquake ruptures are not generated algorithmically from a set of source parameters. Ruptures' rectonic region types are overwritten by source tectonic region type. :param data: List of tuples. Each tuple must contain two items. The first item must be an instance of :class:`openquake.hazardlib.source.rupture.Rupture`. The second item must be an instance of :class:`openquake.hazardlib.pmf.PMF` describing the probability of the rupture to occur N times (the PMF must be defined from a minimum number of occurrences equal to 0) """ _slots_ = BaseSeismicSource._slots_ + ['data'] MODIFICATIONS = set() def __init__(self, source_id, name, tectonic_region_type, data): super(NonParametricSeismicSource, self). \ __init__(source_id, name, tectonic_region_type) = data
[docs] def iter_ruptures(self): """ Get a generator object that yields probabilistic ruptures the source consists of. :returns: Generator of instances of :class: `~openquake.hazardlib.source.rupture.NonParametricProbabilisticRupture`. """ for rup, pmf in yield NonParametricProbabilisticRupture( rup.mag, rup.rake, self.tectonic_region_type, rup.hypocenter, rup.surface, rup.source_typology, pmf)
[docs] def count_ruptures(self): """ See :meth: `openquake.hazardlib.source.base.BaseSeismicSource.count_ruptures`. """ return len(
[docs] def get_min_max_mag(self): """ Return the minimum and maximum magnitudes of the ruptures generated by the source """ min_mag = min(rup.mag for rup, pmf in max_mag = max(rup.mag for rup, pmf in return min_mag, max_mag
[docs] def get_rupture_enclosing_polygon(self, dilation=0): """ Create instance of :class:`openquake.hazardlib.geo.surface.multi.MultiSurface` from all ruptures' surfaces and compute its bounding box. Calculate convex hull of bounding box, and return it dilated by ``dilation``. :param dilation: A buffer distance in km to extend the polygon borders to. :returns: Instance of :class:`openquake.hazardlib.geo.polygon.Polygon`. """ surfaces = [] for rup, _ in if isinstance(rup.surface, MultiSurface): for s in rup.surface.surfaces: surfaces.append(s) else: surfaces.append(rup.surface) multi_surf = MultiSurface(surfaces) west, east, north, south = multi_surf.get_bounding_box() mesh = RectangularMesh(numpy.array([[west, east], [west, east]]), numpy.array([[north, north], [south, south]]), None) poly = mesh.get_convex_hull() return poly if dilation == 0 else poly.dilate(dilation)