gem/oq-hazardlib — pull request #238 by nickhorspool (2014-10-05 21:31:40+00:00)
Title: added Bradley 2013 GMPE

Implements GMPE developed by Brendan Bradley for Active Shallow Crust
Earthquakes for New Zealand, and published as "A New Zealand-Specific
Pseudospectral Acceleration Ground-Motion Prediction Equation for Active
Shallow Crustal Earthquakes Based on Foreign Models" (2013, Bulletin of
the Seismological Society of America, Volume 103, No. 3, pages 1801-1822).

This model is modified from Chiou and Youngs, 2008,2010 and has been adapted
for New Zealand conditions. Specifically, the modifications are related to:
1) small magnitude scaling;
2) scaling of short period ground motion from normal faulting events in
volcanic crust;
3) scaling of ground motions on very hard rock sites;
4) anelastic attenuation in the New Zealand crust;
5) consideration of the increates anelastic attenuation in the Taupo
Volcanic Zone (not implemented in this model, use Bradley2013Volc)