openquake.hmtk.comparison package

Submodules

openquake.hmtk.comparison.rate_grids module

Python tools for calculating activity rates on a grid from a source model

class openquake.hmtk.comparison.rate_grids.RateGrid(limits, sources, area_discretisation=10.0)

Bases: object

Class for calculation of activity rate grids

Parameters:

• xspc (float) – Longitude spacing of grid
• yspc (float) – Latitude spacing of grid
• zspc (float) – Depth spacing (km) of grid
• xlim (np.ndarray) – Longitude cell bounds
• ylim (np.ndarray) – Latitude cell bounds
• zlim (np.ndarray) – Depth cell bounds
• nx (int) – Number of longitude cells
• ny (int) – Number of latitude cells
• nz (int) – Number of depth cells
• source_model (list) – Seismic source mode
• rates (np.ndarray) – Activity rates
• area_discretisation (float) – Discretisation step (km) of area sources

classmethod from_model_files(limits, input_model, investigation_time=1.0, simple_mesh_spacing=1.0, complex_mesh_spacing=5.0, mfd_width=0.1, area_discretisation=10.0)

Reads the hazard model from a file

Parameters:

• limits (list) –

  Grid configuration [west, east, xspc, south, north, yspc,

  upper, lower, zspc]

• input_model (str) – Path to input source model
• investigation_time (float) – Investigation time of Poisson model
• simple_mesh_spacing (float) – Rupture mesh spacing of simple fault (km)
• complex_mesh_spacing (float) – Rupture mesh spacing of complex fault (km)
• mfd_width (float) – Spacing (in magnitude units) of MFD
• area_discretisation (float) – Spacing of discretisation of area source (km)

get_rates(mmin, mmax=inf)

Returns the cumulative rates greater than Mmin

Parameters:mmin (float) – Minimum magnitude

number_sources()

Returns the number of sources

class openquake.hmtk.comparison.rate_grids.RatePolygon(limits, sources, area_discretisation=10.0)

Bases: openquake.hmtk.comparison.rate_grids.RateGrid

Calculates the rate of events within a polygon

Parameters:

• limits – Polygon as instance of :class: openquake.hazardlib.geo.polygon.Polygon
• upper_depth (float) – Upper seismic depth of the polygon (km)
• lower_depth (float) – Lower seismic depth of the polygon (km)
• source_model (list) – List of seismic sources
• rates (float) – Activity rate of polygon
• area_discretisation (float) – Discretisation spacing (km) of the area source

Module contents