[CIG-SHORT] Relax 1.0.2 release

Walter Landry walter at geodynamics.org
Wed Jun 6 12:00:16 PDT 2012


Greetings,

I am pleased to announce the 1.0.2 release of Relax, a Fourier-domain
code to simulate quasi-static deformation relevant to short-term
tectonics. This new version of Relax will be presented in detail at
the CIG 2012 Workshop on Crustal Deformation Modeling.

Relax can be used to evaluate the displacement and stress in a half
space with gravity due to Okada-type dislocations, Mogi sources, and
surface tractions; and the nonlinear time-dependent deformation that
follows due to power-law rheology materials in the bulk and/or
rate-strengthening friction faults. The numerical method is based on a
Fourier-domain elastic Green's function (Barbot & Fialko, 2010a;
2010b) and an equivalent body-force representation of co-seismic and
post-seismic deformation processes (Barbot et al., 2009b).

The applications for the earthquake-cycle modeling include: i)
co-seismic displacement and Coulomb stress calculations, ii)
quasi-static stress transfer between earthquakes due to a postseismic
transient, iii) modeling of postseismic transients including lateral
variations of rheological properties, nonlinear constitutive laws and
multiple mechanisms, iv) cycle of multiple earthquakes and spin-up
models, v) loading cycle of lakes, dams or the monsoon.

DOWNLOAD:

You can download the source code and binaries at:

http://geodynamics.org/cig/software/relax

Detailed installation instructions for the binary package are in the
User Manual. Detailed building instructions for a few platforms are
available with the source in the INSTALL file.

RELEASE NOTES:

* The database of slip distributions now includes the Tohoku
  earthquake from Wei et. al. 2011.

* Some issues with surface tractions have been fixed.

* The installation directions now includes some notes about compiler
  compatibility.

* Minor issues with plotting have been fixed.

Cheers,
Walter Landry


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