Introduction
ISOLA
and ISOLA-GUI are the two parts of ISOLA moment tensor
retrieval software package. Fortran code ISOLA to
retrieve isolated asperities from regional or local
waveforms has been developed since 2003. It is based
on multiple-point source representation and iterative
deconvolution, similar to Kikuchi and Kanamori (1991),
but full wavefield is considered, and Green's
functions are calculated by the discrete wavenumber
method of Bouchon (1981) and Coutant (1989). Moment
tensor of subevents is found by least-square
minimization of misfit between observed and synthetic
waveforms, while position and time of subevents is
optimized through grid search. ISOLA-GUI, is a
Graphical User Interface developed in Matlab with
purpose to combine processing speed of the ISOLA
Fortran code with user-friendly Matlab environment.
Significant features of ISOLA-GUI are efficient data
handling, interactive control of the inversion
process, and wide options of plotting facilities to
display the results. The code is documented in a
manual, accompanied by a test example, and freely
available here.
The package has been developed by J. Zahradnik and E. Sokos.