Area-magnitude scaling relationships¶
Package openquake.hazardlib.scalerel
contains base classes and
implementations of magnitude-area and area-magnitude scaling relationships.
Wells and Coppersmith¶
Module openquake.hazardlib.scalerel.wc1994
implements WC1994
.
-
class
openquake.hazardlib.scalerel.wc1994.
WC1994
[source]¶ Wells and Coppersmith magnitude – rupture area relationships, see 1994, Bull. Seism. Soc. Am., pages 974-2002.
Implements both magnitude-area and area-magnitude scaling relationships.
-
get_median_area
(mag, rake)[source]¶ The values are a function of both magnitude and rake.
Setting the rake to
None
causes their “All” rupture-types to be applied.
-
CEUS SSC¶
Module openquake.hazardlib.scalerel.ceus2011
implements
CEUS2011
.
Peer¶
Module openquake.hazardlib.scalerel.peer
implements PeerMSR
.
Point¶
Module openquake.hazardlib.scalerel.point
implements PointMSR
.
-
class
openquake.hazardlib.scalerel.point.
PointMSR
[source]¶ Implements magnitude-area scaling relationship to mimic point ruptures. Independently of the magnitude value, this scaling relationship returns always a very small value (1e-4 squared km, corresponding to a 10 by 10 m square) for the median area.
NOTE: This scaling-relationship is meant to be used in area and point sources to mimic point ruptures. Is not intended to be used in fault sources, as it would require a fault surface discretization step to small (less than 10 m, using an aspect ratio equal to 1) which is unfeasible for realistic applications.
Strasser et al. 2010¶
Module openquake.hazardlib.scalerel.strasser2010
implements
StrasserInterface
, StrasserIntraslab
.
-
class
openquake.hazardlib.scalerel.strasser2010.
StrasserInterface
[source]¶ Strasser, Arango and Bommer magnitude – rupture area relationships for interface events.
See F. O. Strasser, M. C. Arango, and J. J. Bommer Scaling of the Source Dimensions of Interface and Intraslab Subduction-zone Earthquakes with Moment Magnitude Seismological Research Letters, November/December 2010, v. 81, p. 941-950, doi:10.1785/gssrl.81.6.941
Implements both magnitude-area and area-magnitude scaling relationships.
-
get_median_area
(mag, rake)[source]¶ Calculates median areas as 10** (a + b*mag). The values are a function of magnitude. Rake is ignored.
-
get_median_mag
(area, rake)[source]¶ Return magnitude (Mw) given the area Rake is ignored.
Parameters: area – Area in square km.
-
-
class
openquake.hazardlib.scalerel.strasser2010.
StrasserIntraslab
[source]¶ Strasser, Arango and Bommer magnitude – rupture area relationships for intraslab events.
See F. O. Strasser, M. C. Arango, and J. J. Bommer Scaling of the Source Dimensions of Interface and Intraslab Subduction-zone Earthquakes with Moment Magnitude Seismological Research Letters, November/December 2010, v. 81, p. 941-950, doi:10.1785/gssrl.81.6.941
Implements both magnitude-area and area-magnitude scaling relationships.
-
get_median_area
(mag, rake)[source]¶ Calculates median areas as 10** (a + b*mag). The values are a function of magnitude. Rake is ignored.
-
get_median_mag
(area, rake)[source]¶ Return magnitude (Mw) given the area Rake is ignored.
Parameters: area – Area in square km.
-
Abstract base relationship¶
Module openquake.hazardlib.scalerel.base
defines abstract base
classes for ASR
, MSR
,
ASRSigma
, and MSRSigma
-
class
openquake.hazardlib.scalerel.base.
BaseASR
[source]¶ A base class for Area-Magnitude Scaling Relationship. Allows calculation of rupture magnitude from area.
-
class
openquake.hazardlib.scalerel.base.
BaseASRSigma
[source]¶ Extend
BaseASR
and allows to include uncertainties (sigma) in rupture magnitude estimation.
-
class
openquake.hazardlib.scalerel.base.
BaseMSR
[source]¶ A base class for Magnitude-Area Scaling Relationship. Allows calculation of rupture area from magnitude.