Interactive Receiver Functions Forward Modeller 2 (IRFFM2)
The Interactive Receiver Function Forward Modeller 2 (IRFFM2) is a Java program for
joint interactive forward modelling of teleseismic receiver functions and surface wave dispersion.
IRFFM2 v1.2 is the current version that has been available since October 2015. It contains iterdecon program converted from Fortran to Java.
IRFFM2 v1.1 was an older release that contained the Fortran version of time domain iterative deconvolution iterdecon.
A manual describing the program and the main requirements can be obtained by clicking on the pdf icon below. Please read the
user manual for some important information before download and installation.
IRFFM2 (simultaneous forward modelling of receiver functions and surface wave dispersion) will be available for download soon.
Download IRFFM2 user manual here 
 Screen snapshot showing the IRFFM2v1.2 interface
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IRFFM2 V1.2 is available for Mac OS X.
Mac version download
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The IRFFM2 software is presented in:
Tkalčić, N. Rawlinson, P. Arroucau, A. Kumar and B.L.N. Kennett, Multi-Step modeling of receiver-based seismic and ambient noise data
from WOMBAT array: Crustal structure beneath southeast Australia, Geophys. J. Int., doi: 10.1111/j.1365-246X.2012.05442.x, 189, 1681-1700, 2012.
Multi-Step modeling of receiver-based seismic and ambient noise data
from WOMBAT array: Crustal structure beneath southeast Australia
A limitation of most forms of passive seismic tomography using distant earthquakes lies in the
fact that crustal structure is poorly resolved. An attempt is made here to address this issue by
modelling teleseismic receiver functions (RFs) and dispersion curves derived from ambient
noise through a multistep approach. The SEAL3 experiment in central and southern NewSouth
Wales (NSW) used here, represents one of 13 array deployments that so far comprise the large
WOMBAT project, which aims to cover a significant portion of the Australian continent with
a rolling array of seismometers.
An interactive, forward-modelling software package (IRFFM2) is introduced and applied to
the observed RFs and surface wave dispersion curves to define a prior, physically acceptable
range of elastic parameters in the lithosphere, which is combined with a grid-search and a
linearized inversion.
Our results emphasize the importance of a joint treatment of RFs and dispersion data
as the predictions from 1-D velocity models at individual stations derived from only RFs
display large departures from the observed ambient noise dispersion curves. In total, 27 jointly
constrained 1-D shear wave models are produced, which provide sufficient sampling of the
crust beneath SEAL3 to permit detailed inferences about lateral variations in structure to be
made. Of particular note is the observation that the Moho deepens towards the mountainous
southeast, where it exceeds 50 km in depth beneath the Southern Highlands of NSW, thus
marking out some of the thickest crust in Australia. The complex lateral variations in midlower
crustal velocity that we observe probably reflect the manifold interactions of a thinning
lithosphere, associated igneous underplating, recent hot-spot-related volcanism and uplift. Our
results image an important part of the lithosphere that is poorly constrained by regional and
teleseismic tomography, and contribute to the understanding of the formation of the southern
highlands and the Palaeozoic Lachlan Orogen.
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