NGA-West2

Python implementation of the NGA-West2 GMPEs

This repository is forked from https://github.com/fengw/pynga and substantial changes have been made to improve its usability, readability, compatibility, and maintainability. The core codes (i.e., the number crunching parts) were not altered.

Installation

>>> pip install git+https://github.com/Caltech-geoquake/ngawest2

System requirements

• Python 2.7+
• numpy

Quick example

import ngawest2

model = 'ASK14'
Mw, R_rup, Vs30, T, rake= 5.5, 20, 450, 2.4, 0
result = ngawest2.GMPE(model, Mw, R_rup, Vs30, T, rake=rake)  # a single value

T_array = [2, 3, 4, 5, 6]
results = ngawest2.GMPE_array(model, Mw, R_rup, Vs30, T_array, rake=rake)  # an array

T = 0.7  # unit: second
z1 = 75  # unit: meter
PGA = 0.9  # unit: g
ampl = ngawest2.site_factor('BSSA', Vs30, z1, PGA, T)  # a single value

To-do

• Improve documentation
• Remove obsolete codes