Intensity measure types¶
Module openquake.hazardlib.imt defines different intensity measure
types.
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class
openquake.hazardlib.imt.PGA[source]¶ Peak ground acceleration during an earthquake measured in units of
g, times of gravitational acceleration.
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class
openquake.hazardlib.imt.PGV[source]¶ Peak ground velocity during an earthquake measured in units of
cm/sec.
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class
openquake.hazardlib.imt.PGD[source]¶ Peak ground displacement during an earthquake measured in units of
cm.
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class
openquake.hazardlib.imt.SA[source]¶ Spectral acceleration, defined as the maximum acceleration of a damped, single-degree-of-freedom harmonic oscillator. Units are
g, times of gravitational acceleration.Parameters: - period – The natural period of the oscillator in seconds.
- damping – The degree of damping for the oscillator in percents.
Raises: ValueError – if period or damping is not positive.
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damping¶ itemgetter(item, ...) –> itemgetter object
Return a callable object that fetches the given item(s) from its operand. After f = itemgetter(2), the call f(r) returns r[2]. After g = itemgetter(2, 5, 3), the call g(r) returns (r[2], r[5], r[3])
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period¶ itemgetter(item, ...) –> itemgetter object
Return a callable object that fetches the given item(s) from its operand. After f = itemgetter(2), the call f(r) returns r[2]. After g = itemgetter(2, 5, 3), the call g(r) returns (r[2], r[5], r[3])
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class
openquake.hazardlib.imt.IA[source]¶ Arias intensity. Determines the intensity of shaking by measuring the acceleration of transient seismic waves. Units are
m/s.
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class
openquake.hazardlib.imt.CAV[source]¶ Cumulative Absolute Velocity. Defins the integral of the absolute acceleration time series. Units are “g-sec”
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class
openquake.hazardlib.imt.RSD[source]¶ Relative significant duration, 5-95% of
Arias intensity, in seconds.