[CIG-SEISMO] Bug? Check functionality of force direction

[Dimitri Komatitsch]

Hi,

Thanks for the bug report, and great if Daniel can fix it!

By the way, at some point we should also check this old issue: 
https://github.com/geodynamics/specfem3d/issues/842
(I will try to find time to do it next month)

Best wishes,
Dimitri.

On 02/16/2018 08:14 PM, Daniel B. Peter wrote:
> hi Mathias,
> 
> you’re right. it doesn’t work correctly for elastic point forces. i just came across the same bug which was introduced recently and will submit a bug fix soon to the devel branch.
> 
> many thanks for spotting!
> daniel
> 
> 
> 
>> On Feb 16, 2018, at 19:46, Mathias Pilch <mathias.pilch at tu-dortmund.de> wrote:
>>
>> Dear developers of Specfem3D,
>>
>> there appears to be a bug in the latest devel version when using a point force source.
>>
>> The line in DATA/FORCESOLUTION
>>
>>     component dir vect source Z_UP:    -1.d0
>>
>> does not seem to have any effect. I tested it with a Gaussian with hdur = 0.06 s, and
>> both
>>
>>     component dir vect source Z_UP:    -1.d0
>>
>> and
>>
>>     component dir vect source Z_UP:    1.d0
>>
>> However, the resulting seismograms (semv) look the same, while in reality those calculated with
>> the opposite sign should yield the inverted seismograms.
>>
>> Could you please check that?
>>
>> Thank you in advance,
>> Mathias Pilch
>>
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-- 
Dimitri Komatitsch, CNRS Research Director (DR CNRS)
Laboratory of Mechanics and Acoustics, Marseille, France
http://komatitsch.free.fr