[CIG-SEISMO] Simple Asking SPECFEM2D

[Anton Gulley]

Hi JungRak

As far as I am aware the source type you will have is a Ricker wavelet.  It
is convenient to have the time start before zero so the peak of the Ricker
wavelet is at zero.

I am unaware of how to do what you ask using the source_file or Par_file
other than by editing the source code.

You can always apply a shift in time to your output files


Hope this helps
Anton


PhD student at Auckland University


On 6 November 2013 13:07, Jungrak SON <jrson2011 at gmail.com> wrote:

> Before asking, I appreciate to whom may have tried to develop this great
> tool.
>
>
> Hi, I am a beginning master student in Geophysics and please let me ask
> about SPECFEM2D " *Par_file* ".
>
> At the line of " *# time step parameters* ", I used to set " *USER_T0 *"
> as *zero*. This is convenient to use automatically calculated one.
> However,* may I ask why result  time always starts from negative value?
> what should I do to make the simulation start from zero time?*
>
> Thanks for your time and concerning. Please * please let me know how to
> control this.
>
> Best regards,
>
> P.S. I am trying to use this tool for near-surface heterogeneous land
> seismic simulation. :) I trust this amazing SEM tool must be the best
> method for my research. Thank you.
>
> - JungRak Son
>
> Master Student at Texas A&M University
>
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