shakelib.conversions.imc.beyer_bommer_2006¶
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class
shakelib.conversions.imc.beyer_bommer_2006.BeyerBommer2006[source]¶ Bases:
objectImplements conversion for various “Intensity Measure Components” (IMCs) per Beyer and Bommer (2006).
IMC equivalencies:
OpenQuake Beyer & Bommer AVERAGE_HORIZONTAL GMxy (Geometric mean) HORIZONTAL Random? MEDIAN_HORIZONTAL AMxy (Arithmetic mean) GMRotI50 GMRotI50 RotD50 GMRotD50 RANDOM_HORIZONTAL Random GREATER_OF_TWO_HORIZONTAL Env_xy VERTICAL — Notes
- AVERAGE_HORIZONTAL is the “reference” type.
- The OQ IMC “HORIZONAL” indicates that the horizontal IMC category may be ambiguous. In these cases, we are assuming that it is a random horizontal component as a default.
To do
- Inherit from ConvertIMC class.
References
Beyer, K., & Bommer, J. J. (2006). Relationships between median values and between aleatory variabilities for different definitions of the horizontal component of motion. Bulletin of the Seismological Society of America, 96(4A), 1512-1522. [link]-
static
ampIMCtoIMC(amps, imc_in, imc_out, imt)[source]¶ Returns amps converted from one IMC to another.
Important:
- Assumes the input amps are in natural log (not linear) space
- IMC type ‘VERTICAL’ is not supported
Parameters: - amps (array) – Numpy array of ground motion amplitudes.
- imc_in (IMC) – OpenQuake IMC type of the input amp array. [link]
- imc_out (IMC) – Desired OpenQuake IMC type of the output amps. [link]
- imt (IMT) – OpenQuake IMT of the input amps (must be one of PGA, PGV, or SA). [link] <http://docs.openquake.org/oq-hazardlib/master/imt.html>
Returns: Numpy array of amps converted from imc_in to imc_out.
Return type: array
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static
sigmaIMCtoIMC(sigmas, imc_in, imc_out, imt)[source]¶ Returns standard deviations converted from one IMC to another.
Important:
- Assumes the input sigmas are in natural log space
- IMC types ‘VERTICAL’ and ‘HORIZONTAL’ are not supported
Parameters: Returns: - Numpy array of standard deviations converted from imc_in to
imc_out.
Return type: array
