# Estimating stresses, fault friction and fluid pressure from topography and coseismic slip models — AGU 2014 Presentation

For the AGU Fall Meeting 2014, Eric Hetland and I presented a summary of our recent work on stress and fault property estimation in seismically active areas with high topography. Much of this work is featured in a forthcoming Journal of Geophysical Research paper (focusing on the 2008 Wenchuan event ...

# Topographic and tectonic stress inversions with halfspace: Calculating topographic stresses on a fault

In order to complete the tutorial, please first clone/download the github repo which comes with the DEM, coseismic slip model, and some auxiliary files, all with the correct pathnames.

This part is pretty easy. It’s just an interpolation of the topographic stress field ...

# Topographic and tectonic stress inversions with halfspace: Calculating the topographic stress field

edited 22 Feb 2015: Equations $G_{xx}^B$ and $G_{yy}^B$ corrected

## Background of the topographic stress field calculations

The weight of mountains (or other high topography) induces stresses in the earth below the topography. Unlike many other types of stress in the crust, topographic stresses are expected to ...

# Topographic and tectonic stress inversions with halfspace: Preparing a coseismic slip model

In order to complete the tutorial, please first clone/download the github repo which comes with the DEM, coseismic slip model, and some auxiliary files, all with the correct pathnames.

We will be using a fault slip model from the Mw 2013 Balochistan, Pakistan earthquake ...

# Topographic and tectonic stress inversions with halfspace: Preparing a DEM

In order to complete the tutorial, please first clone/download the github repo which comes with the DEM, coseismic slip model, and some auxiliary files, all with the correct pathnames.

In [1]:
# inline plotting

%matplotlib inline
%config InlineBackend.figure_format = 'retina'

In [2]:
from __future__ import ...

# Topographic and tectonic stress inversions with halfspace: Installation and Configuration

In order to complete the tutorial, please first clone/download the github repo which comes with the DEM, coseismic slip model, and some auxiliary files, all with the correct pathnames.

## Scientific Python installation

The first step in using halfspace for topographic stress calculations is to ...

# Halfspace: a Python package for elastic halfspace calculations

(edited 4 October 2014)

## Part 1: Introduction

I’ve been working the past year and a half on calculating topographic and tectonic stresses. This work has relied heavily on using elastic halfspace approximations, which are quite commonly used in the crustal deformation communities, particularly by geodesists. To this end, I ...

# AGU and SSA have new open access policies

Open access to scientific publications and datasets is very important for both scientific progress and for the incorporation of scientific knowledge into the public sphere. The reasons for this are manifold, and have been enumerated so vociferously on various blogs, email lists, and internet fora that one fears the spittle ...

# Low-angle Normal Fault Likelihood IPython Notebook

This is an IPython Notebook version of a paper I have just submitted to Geophysical Research Letters. This is the complete paper, but with all the code embedded, and is executable. However, it does need a Python module called eq_stats.py as well as some of the typical Python scientific ...

# Evolution of fault stress through the earthquake cycle: a Mohr circle perspective

In my recent work on topographic stresses and their interaction with faulting, I have been thinking a bit about what stresses look like on a fault during the earthquake cycle. I wrote this IPython notebook to explore this topic a little bit.