Implements the ground motion prediction equation of Rietbrock et al (2013):
Rietbrock, A., Strasser, F., Edwards, B. (2013) A Stochastic Earthquake Ground-Motion Prediction Model for the United Kingdom. Bulletin of the Seismological Society of America, 103(1), 57 -77
The GMPE is derived for the United Kingdom, a low seismicity region. Consequently ground motions are generated via numerical simulations using a stochastic point-source model, calibrated with parameters derived from local weak-motion data. This implementation applies to the case when stress drop is considered to be self-similar (i.e. independent of magnitude).
Supported intensity measure component is the geometric mean of two horizontal components
Supported intensity measure types are spectral acceleration, peak ground acceleration and peak ground velocity.
Supported standard deviation types are inter-event, intra-event and total
Supported tectonic region type is stabe continental crust,
Required distance measure is Rjb
Required rupture parameters are magnitude
No site parameter is required
Implements the Rietbrock et al (2013) GMPE for the case in which the stress parameter is magnitude-dependent (Table 6, Page 65)