[CIG-SEISMO] gmsh and specfem2D

giuseppe.digiulio at ingv.it giuseppe.digiulio at ingv.it
Thu Sep 6 07:41:09 PDT 2012


I am a new user of specfem2D  and I am trying to generate an external  
simple 2D mesh using gmsh; this seems  one nice external fe grid  
generator as indicated by specfem2d user  manual (version 7, page 10).

My question is about Jacobian as returned by the  script  
xcheck_quality_external_mesh.

I built using gmsh a simple geometry file composed of three uniform  
layers (see the attached  *geo file).

I performed a 2D mesh using allquads following the example shown in  
specfem2D manual  (fixing a minimum element size of 20 because  
dimension of my model is  relatively big).

gmsh 3UFscale_allquad.geo -2 -clmin 20 -order 2

I set the absorbing conditions with the python script
python ../LibGmsh2Specfem.py 3UFscale_allquad -t A -b A -r A -l A

obtaining the Mesh* Material* Nodes* Surf_abs_* and Surf_free* files.

Now my problem is in the quality of my mesh as returned by    
xcheck_quality_external_mesh because it returns negative jacobian.

xcheck_quality_external_mesh
:::::::
start reading the external node file: Nodes_3UFscale_allquad
start reading the external mesh file: Mesh_3UFscale_allquad
NPOIN =        12663
NSPEC =        12462
done reading the external files

start checking if any element with a negative Jacobian is found
element         6251  has a negative Jacobian
STOP negative Jacobian found
::::::

I do not know how can I improve my mesh to pass this check; I try to  
delete the element 6251  with negative Jacobian but this is not the  
only one. I tried different  options in the 2D meshing, but still  
obtaining negative jacobian.

And it is also strange that the  Jmin seems 0.497 when I use  
Tool/plugins og gmsh to analyseCurveMesh (see picture in attach). If I  
understood well from gmsh manual (pa. 66) Jmin should be the minimum  
Jacobian and this seems not negative.

I also attached the output files output_mesher.txt and  
output_solver.txt obtained by xmeshfem2D and xspecfem2D, respectively.
Of course xspecfem2D crashs, and all elements with negative Jacobian  
are reported into output_solver.txt.

So my question is: how can I improve my external 2D mesh built by gmsh  
for having positive jacobian everywhere  ?

If someone of developpers has any suggestions to improve my mesh  
deleting elements with negative jacobian in my  mesh, these are  
welcome!!!

The file *tar.gz contains my trial of mesh

Best regards and thank you in advance!

Giuseppe Di Giulio
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-------------- next part --------------
lc = 1e-1;

Point(1) = {0, 0, 0, lc};
Point(2) = {1000, 0, 0, lc};
Point(3) = {0, 1000, 0, lc};
Point(4) = {1000, 1000, 0, lc};
Point(5) = {0, 500, 0, lc};
Point(6) = {1000, 500, 0, lc};
Point(7) = {0, 800, 0, lc};
Point(8) = {1000, 800, 0, lc};

Line(1) = {1, 2};
Line(2) = {2, 6};
Line(3) = {6, 5};
Line(4) = {5, 1};

Line(5) = {5, 7};
Line(6) = {7, 8};
Line(7) = {8, 6};

Line(8) = {8, 4};
Line(9) = {4, 3};
Line(10) = {3, 7};

Line Loop(11) = {1, 2, 3, 4};
Plane Surface(12) = {11};

Line Loop(13) = {3, 5, 6, 7};
Plane Surface(14) = {13};

Line Loop(15) = {6, 8, 9, 10};
Plane Surface(16) = {15};

Recombine Surface{12,14,16};
Mesh.SubdivisionAlgorithm=1;
Mesh.RandomFactor=1e-6;

Physical Line("Top") = {9};
Physical Line("Left") = {10,-5,4};
Physical Line("Bottom") = {1};
Physical Line("Right") = {2,-7,8};

Physical Surface("M1") = {16};
Physical Surface("M2") = {14};
Physical Surface("M3") = {12};
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 -------------------------------------------------------------------------------
 -------------------------------------------------------------------------------
 Program SPECFEM2D: 
 -------------------------------------------------------------------------------
 -------------------------------------------------------------------------------
 3UF Three Uniform layers                          
 -------------------------------------------------------------------------------
 -------------------------------------------------------------------------------
 D a t e : 05 - 09 - 2012                                 T i m e  : 16:57:22
 -------------------------------------------------------------------------------
 -------------------------------------------------------------------------------


 *********************
 ****             ****
 ****  SPECFEM2D  ****
 ****             ****
 *********************


 C o n t r o l
 =============

     Number of spectral element control nodes. . .(npgeo) =   50249
     Number of space dimensions. . . . . . . . . . (NDIM) =       2


 C o n t r o l
 =============

     Display frequency . . . (NTSTEP_BETWEEN_OUTPUT_INFO) =    300
     Color display . . . . . . . . . . . . . . . (colors) =      1
             ==  0     black and white display              
             ==  1     color display                        
     Numbered mesh . . . . . . . . . . . . . . .(numbers) =      0
             ==  0     do not number the mesh               
             ==  1     number the mesh                      


 C o n t r o l
 =============

     Seismograms recording type . . . . . . .(seismotype) =      1
     Angle for first line of receivers. . . . .(anglerec) =   0.00


 C o n t r o l
 =============

     Read external initial field. . . . . .(initialfield) =      F
     Add Bielak conditions . . . .(add_Bielak_conditions) =      F
     Assign external model . . . .(assign_external_model) =      F
     Read external SEP file . . .(READ_EXTERNAL_SEP_FILE) =      F
     Attenuation on/off .(ATTENUATION_VISCOELASTIC_SOLID) =      F
     Save grid in external file or not. . . (output_grid) =      F
     Save a file with total energy or not.(output_energy) =      F


 C o n t r o l
 =============

     Vector display type . . . . . . . . . . . . . . (imagetype) =      1
     Percentage of cut for vector plots. . . . . . . .(cutsnaps) =   1.00
     Subsampling of velocity model display. (subsamp_postscript) =      1


 I t e r a t i o n s 
 ===================

     Number of time iterations . . . . .(NSTEP) =    2400
     Time step increment. . . . . . . .(deltat) =   5.000000E-08
     Total simulation duration . . . . . (ttot) =   1.200000E-04


     Source Type. . . . . . . . . . . . . . = Collocated Force
     X-position (meters). . . . . . . . . . =    5.0000000000E+02
     Y-position (meters). . . . . . . . . . =    2.0000000000E+02
     Fundamental frequency (Hz) . . . . . . =    6.0000000000E+03
     Time delay (s) . . . . . . . . . . . . =    0.0000000000E+00
     Multiplying factor . . . . . . . . . . =    1.0000000000E+10
     Angle from vertical direction (deg). . =    0.0000000000E+00

     Onset time. . . . . . =   1.99999999999999982E-004
     Fundamental period. . =   1.66666666666666661E-004
     Fundamental frequency =    6000.0000000000000     
     --> onset time ok

     --> Isoparametric Spectral Elements <--


     Number of spectral elements . . . . .  (nspec) =  12462
     Number of control nodes per element .  (ngnod) =      9
     Number of points in X-direction . . .  (NGLLX) =      5
     Number of points in Y-direction . . .  (NGLLZ) =      5
     Number of points per element. . .(NGLLX*NGLLZ) =     25
     Number of points for display . . .(pointsdisp) =      6
     Number of element material sets . . .  (numat) =      3
     Number of absorbing elements . . . .(nelemabs) =    396


 M a t e r i a l   s e t s :   2 D  (p o r o) e l a s t i c i t y
 ======================================================

     Number of material sets . . . . . . (numat) =     3


     ----------------------------------------
     -- Elastic (solid) isotropic material --
     ----------------------------------------
     Material set number. . . . . . . . (jmat) =     1
     P-wave velocity. . . . . . . . . . . (cp) = 1.00000000E+03
     S-wave velocity. . . . . . . . . . . (cs) = 5.00000000E+02
     Mass density. . . . . . . . . . (density) = 2.00000000E+03
     Poisson's ratio. . . . . . . . .(poisson) = 3.33333333E-01
     First Lame parameter Lambda. . . (lambda) = 1.00000000E+09
     Second Lame parameter Mu. . . . . . .(mu) = 5.00000000E+08
     Bulk modulus Kappa . . . . . . . .(kappa) = 1.33333333E+09
     Young's modulus E. . . . . . . . .(young) = 1.33333333E+09
     QKappa_attenuation .  . . . . . .(QKappa) = 1.00000000E+01
     Qmu_attenuation . . . . . . . . . . (Qmu) = 1.00000000E+01


     ----------------------------------------
     -- Elastic (solid) isotropic material --
     ----------------------------------------
     Material set number. . . . . . . . (jmat) =     2
     P-wave velocity. . . . . . . . . . . (cp) = 1.60000000E+03
     S-wave velocity. . . . . . . . . . . (cs) = 8.00000000E+02
     Mass density. . . . . . . . . . (density) = 2.00000000E+03
     Poisson's ratio. . . . . . . . .(poisson) = 3.33333333E-01
     First Lame parameter Lambda. . . (lambda) = 2.56000000E+09
     Second Lame parameter Mu. . . . . . .(mu) = 1.28000000E+09
     Bulk modulus Kappa . . . . . . . .(kappa) = 3.41333333E+09
     Young's modulus E. . . . . . . . .(young) = 3.41333333E+09
     QKappa_attenuation .  . . . . . .(QKappa) = 1.00000000E+01
     Qmu_attenuation . . . . . . . . . . (Qmu) = 1.00000000E+01


     ----------------------------------------
     -- Elastic (solid) isotropic material --
     ----------------------------------------
     Material set number. . . . . . . . (jmat) =     3
     P-wave velocity. . . . . . . . . . . (cp) = 3.00000000E+03
     S-wave velocity. . . . . . . . . . . (cs) = 1.50000000E+03
     Mass density. . . . . . . . . . (density) = 2.00000000E+03
     Poisson's ratio. . . . . . . . .(poisson) = 3.33333333E-01
     First Lame parameter Lambda. . . (lambda) = 9.00000000E+09
     Second Lame parameter Mu. . . . . . .(mu) = 4.50000000E+09
     Bulk modulus Kappa . . . . . . . .(kappa) = 1.20000000E+10
     Young's modulus E. . . . . . . . .(young) = 1.20000000E+10
     QKappa_attenuation .  . . . . . .(QKappa) = 1.00000000E+01
     Qmu_attenuation . . . . . . . . . . (Qmu) = 1.00000000E+01

 Number of absorbing elements:          396
   nspec_left =          106
   nspec_right =           90
   nspec_bottom =          106
   nspec_top =           97



 Generating global mesh numbering (fast version)...


 Total number of points of the global mesh:       200193


 Total number of receivers =           10

 element         6251  has a negative Jacobian
 element         6252  has a negative Jacobian
 element         6253  has a negative Jacobian
 element         6254  has a negative Jacobian
 element         6255  has a negative Jacobian
 element         6256  has a negative Jacobian
 element         6257  has a negative Jacobian
 element         6258  has a negative Jacobian
 element         6259  has a negative Jacobian
 element         6260  has a negative Jacobian
 element         6261  has a negative Jacobian
 element         6262  has a negative Jacobian
 element         6263  has a negative Jacobian
 element         6264  has a negative Jacobian
 element         6265  has a negative Jacobian
 element         6266  has a negative Jacobian
 element         6267  has a negative Jacobian
 element         6268  has a negative Jacobian
 element         6269  has a negative Jacobian
 element         6270  has a negative Jacobian
 element         6271  has a negative Jacobian
 element         6272  has a negative Jacobian
 element         6273  has a negative Jacobian
 element         6274  has a negative Jacobian
 element         6275  has a negative Jacobian
 element         6276  has a negative Jacobian
 element         6277  has a negative Jacobian
 element         6278  has a negative Jacobian
 element         6279  has a negative Jacobian
 element         6280  has a negative Jacobian
 element         6281  has a negative Jacobian
 element         6282  has a negative Jacobian
 element         6283  has a negative Jacobian
 element         6284  has a negative Jacobian
 element         6285  has a negative Jacobian
 element         6286  has a negative Jacobian
 element         6287  has a negative Jacobian
 element         6288  has a negative Jacobian
 element         6289  has a negative Jacobian
 element         6290  has a negative Jacobian
 element         6291  has a negative Jacobian
 element         6292  has a negative Jacobian
 element         6293  has a negative Jacobian
 element         6294  has a negative Jacobian
 element         6295  has a negative Jacobian
 element         6296  has a negative Jacobian
 element         6297  has a negative Jacobian
 element         6298  has a negative Jacobian
 element         6299  has a negative Jacobian
 element         6300  has a negative Jacobian
 element         6301  has a negative Jacobian
 element         6302  has a negative Jacobian
 element         6303  has a negative Jacobian
 element         6304  has a negative Jacobian
 element         6305  has a negative Jacobian
 element         6306  has a negative Jacobian
 element         6307  has a negative Jacobian
 element         6308  has a negative Jacobian
 element         6309  has a negative Jacobian
 element         6310  has a negative Jacobian
 element         6311  has a negative Jacobian
 element         6312  has a negative Jacobian
 element         6313  has a negative Jacobian
 element         6314  has a negative Jacobian
 element         6315  has a negative Jacobian
 element         6316  has a negative Jacobian
 element         6317  has a negative Jacobian
 element         6318  has a negative Jacobian
 element         6319  has a negative Jacobian
 element         6320  has a negative Jacobian
 element         6321  has a negative Jacobian
 element         6322  has a negative Jacobian
 element         6323  has a negative Jacobian
 element         6324  has a negative Jacobian
 element         6325  has a negative Jacobian
 element         6326  has a negative Jacobian
 element         6327  has a negative Jacobian
 element         6328  has a negative Jacobian
 element         6329  has a negative Jacobian
 element         6330  has a negative Jacobian
 element         6331  has a negative Jacobian
 element         6332  has a negative Jacobian
 element         6333  has a negative Jacobian
 element         6334  has a negative Jacobian
 element         6335  has a negative Jacobian
 element         6336  has a negative Jacobian
 element         6337  has a negative Jacobian
 element         6338  has a negative Jacobian
 element         6339  has a negative Jacobian
 element         6340  has a negative Jacobian
 element         6341  has a negative Jacobian
 element         6342  has a negative Jacobian
 element         6343  has a negative Jacobian
 element         6344  has a negative Jacobian
 element         6345  has a negative Jacobian
 element         6346  has a negative Jacobian
 element         6347  has a negative Jacobian
 element         6348  has a negative Jacobian
 element         6349  has a negative Jacobian
 element         6350  has a negative Jacobian
 element         6351  has a negative Jacobian
 element         6352  has a negative Jacobian
 element         6353  has a negative Jacobian
 element         6354  has a negative Jacobian
 element         6355  has a negative Jacobian
 element         6356  has a negative Jacobian
 element         6357  has a negative Jacobian
 element         6358  has a negative Jacobian
 element         6359  has a negative Jacobian
 element         6360  has a negative Jacobian
 element         6361  has a negative Jacobian
 element         6362  has a negative Jacobian
 element         6363  has a negative Jacobian
 element         6364  has a negative Jacobian
 element         6365  has a negative Jacobian
 element         6366  has a negative Jacobian
 element         6367  has a negative Jacobian
 element         6368  has a negative Jacobian
 element         6369  has a negative Jacobian
 element         6370  has a negative Jacobian
 element         6371  has a negative Jacobian
 element         6372  has a negative Jacobian
 element         6373  has a negative Jacobian
 element         6374  has a negative Jacobian
 element         6375  has a negative Jacobian
 element         6376  has a negative Jacobian
 element         6377  has a negative Jacobian
 element         6378  has a negative Jacobian
 element         6379  has a negative Jacobian
 element         6380  has a negative Jacobian
 element         6381  has a negative Jacobian
 element         6382  has a negative Jacobian
 element         6383  has a negative Jacobian
 element         6384  has a negative Jacobian
 element         6385  has a negative Jacobian
 element         6386  has a negative Jacobian
 element         6387  has a negative Jacobian
 element         6388  has a negative Jacobian
 element         6389  has a negative Jacobian
 element         6390  has a negative Jacobian
 element         6391  has a negative Jacobian
 element         6392  has a negative Jacobian
 element         6393  has a negative Jacobian
 element         6394  has a negative Jacobian
 element         6395  has a negative Jacobian
 element         6396  has a negative Jacobian
 element         6397  has a negative Jacobian
 element         6398  has a negative Jacobian
 element         6399  has a negative Jacobian
 element         6400  has a negative Jacobian
 element         6401  has a negative Jacobian
 element         6402  has a negative Jacobian
 element         6403  has a negative Jacobian
 element         6404  has a negative Jacobian
 element         6405  has a negative Jacobian
 element         6406  has a negative Jacobian
 element         6407  has a negative Jacobian
 element         6408  has a negative Jacobian
 element         6409  has a negative Jacobian
 element         6410  has a negative Jacobian
 element         6411  has a negative Jacobian
 element         6412  has a negative Jacobian
 element         6413  has a negative Jacobian
 element         6414  has a negative Jacobian
 element         6415  has a negative Jacobian
 element         6416  has a negative Jacobian
 element         6417  has a negative Jacobian
 element         6418  has a negative Jacobian
 element         6419  has a negative Jacobian
 element         6420  has a negative Jacobian
 element         6421  has a negative Jacobian
 element         6422  has a negative Jacobian
 element         6423  has a negative Jacobian
 element         6424  has a negative Jacobian
 element         6425  has a negative Jacobian
 element         6426  has a negative Jacobian
 element         6427  has a negative Jacobian
 element         6428  has a negative Jacobian
 element         6429  has a negative Jacobian
 element         6430  has a negative Jacobian
 element         6431  has a negative Jacobian
 element         6432  has a negative Jacobian
 element         6433  has a negative Jacobian
 element         6434  has a negative Jacobian
 element         6435  has a negative Jacobian
 element         6436  has a negative Jacobian
 element         6437  has a negative Jacobian
 element         6438  has a negative Jacobian
 element         6439  has a negative Jacobian
 element         6440  has a negative Jacobian
 element         6441  has a negative Jacobian
 element         6442  has a negative Jacobian
 element         6443  has a negative Jacobian
 element         6444  has a negative Jacobian
 element         6445  has a negative Jacobian
 element         6446  has a negative Jacobian
 element         6447  has a negative Jacobian
 element         6448  has a negative Jacobian
 element         6449  has a negative Jacobian
 element         6450  has a negative Jacobian
 element         6451  has a negative Jacobian
 element         6452  has a negative Jacobian
 element         6453  has a negative Jacobian
 element         6454  has a negative Jacobian
 element         6455  has a negative Jacobian
 element         6456  has a negative Jacobian
 element         6457  has a negative Jacobian
 element         6458  has a negative Jacobian
 element         6459  has a negative Jacobian
 element         6460  has a negative Jacobian
 element         6461  has a negative Jacobian
 element         6462  has a negative Jacobian
 element         6463  has a negative Jacobian
 element         6464  has a negative Jacobian
 element         6465  has a negative Jacobian
 element         6466  has a negative Jacobian
 element         6467  has a negative Jacobian
 element         6468  has a negative Jacobian
 element         6469  has a negative Jacobian
 element         6470  has a negative Jacobian
 element         6471  has a negative Jacobian
 element         6472  has a negative Jacobian
 element         6473  has a negative Jacobian
 element         6474  has a negative Jacobian
 element         6475  has a negative Jacobian
 element         6476  has a negative Jacobian
 element         6477  has a negative Jacobian
 element         6478  has a negative Jacobian
 element         6479  has a negative Jacobian
 element         6480  has a negative Jacobian
 element         6481  has a negative Jacobian
 element         6482  has a negative Jacobian
 element         6483  has a negative Jacobian
 element         6484  has a negative Jacobian
 element         6485  has a negative Jacobian
 element         6486  has a negative Jacobian
 element         6487  has a negative Jacobian
 element         6488  has a negative Jacobian
 element         6489  has a negative Jacobian
 element         6490  has a negative Jacobian
 element         6491  has a negative Jacobian
 element         6492  has a negative Jacobian
 element         6493  has a negative Jacobian
 element         6494  has a negative Jacobian
 element         6495  has a negative Jacobian
 element         6496  has a negative Jacobian
 element         6497  has a negative Jacobian
 element         6498  has a negative Jacobian
 element         6499  has a negative Jacobian
 element         6500  has a negative Jacobian
 element         6501  has a negative Jacobian
 element         6502  has a negative Jacobian
 element         6503  has a negative Jacobian
 element         6504  has a negative Jacobian
 element         6505  has a negative Jacobian
 element         6506  has a negative Jacobian
 element         6507  has a negative Jacobian
 element         6508  has a negative Jacobian
 element         6509  has a negative Jacobian
 element         6510  has a negative Jacobian
 element         6511  has a negative Jacobian
 element         6512  has a negative Jacobian
 element         6513  has a negative Jacobian
 element         6514  has a negative Jacobian
 element         6515  has a negative Jacobian
 element         6516  has a negative Jacobian
 element         6517  has a negative Jacobian
 element         6518  has a negative Jacobian
 element         6519  has a negative Jacobian
 element         6520  has a negative Jacobian
 element         6521  has a negative Jacobian
 element         6522  has a negative Jacobian
 element         6523  has a negative Jacobian
 element         6524  has a negative Jacobian
 element         6525  has a negative Jacobian
 element         6526  has a negative Jacobian
 element         6527  has a negative Jacobian
 element         6528  has a negative Jacobian
 element         6529  has a negative Jacobian
 element         6530  has a negative Jacobian
 element         6531  has a negative Jacobian
 element         6532  has a negative Jacobian
 element         6533  has a negative Jacobian
 element         6534  has a negative Jacobian
 element         6535  has a negative Jacobian
 element         6536  has a negative Jacobian
 element         6537  has a negative Jacobian
 element         6538  has a negative Jacobian
 element         6539  has a negative Jacobian
 element         6540  has a negative Jacobian
 element         6541  has a negative Jacobian
 element         6542  has a negative Jacobian
 element         6543  has a negative Jacobian
 element         6544  has a negative Jacobian
 element         6545  has a negative Jacobian
 element         6546  has a negative Jacobian
 element         6547  has a negative Jacobian
 element         6548  has a negative Jacobian
 element         6549  has a negative Jacobian
 element         6550  has a negative Jacobian
 element         6551  has a negative Jacobian
 element         6552  has a negative Jacobian
 element         6553  has a negative Jacobian
 element         6554  has a negative Jacobian
 element         6555  has a negative Jacobian
 element         6556  has a negative Jacobian
 element         6557  has a negative Jacobian
 element         6558  has a negative Jacobian
 element         6559  has a negative Jacobian
 element         6560  has a negative Jacobian
 element         6561  has a negative Jacobian
 element         6562  has a negative Jacobian
 element         6563  has a negative Jacobian
 element         6564  has a negative Jacobian
 element         6565  has a negative Jacobian
 element         6566  has a negative Jacobian
 element         6567  has a negative Jacobian
 element         6568  has a negative Jacobian
 element         6569  has a negative Jacobian
 element         6570  has a negative Jacobian
 element         6571  has a negative Jacobian
 element         6572  has a negative Jacobian
 element         6573  has a negative Jacobian
 element         6574  has a negative Jacobian
 element         6575  has a negative Jacobian
 element         6576  has a negative Jacobian
 element         6577  has a negative Jacobian
 element         6578  has a negative Jacobian
 element         6579  has a negative Jacobian
 element         6580  has a negative Jacobian
 element         6581  has a negative Jacobian
 element         6582  has a negative Jacobian
 element         6583  has a negative Jacobian
 element         6584  has a negative Jacobian
 element         6585  has a negative Jacobian
 element         6586  has a negative Jacobian
 element         6587  has a negative Jacobian
 element         6588  has a negative Jacobian
 element         6589  has a negative Jacobian
 element         6590  has a negative Jacobian
 element         6591  has a negative Jacobian
 element         6592  has a negative Jacobian
 element         6593  has a negative Jacobian
 element         6594  has a negative Jacobian
 element         6595  has a negative Jacobian
 element         6596  has a negative Jacobian
 element         6597  has a negative Jacobian
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 element         9996  has a negative Jacobian
 element         9997  has a negative Jacobian
 element         9998  has a negative Jacobian
 element         9999  has a negative Jacobian
 element        10000  has a negative Jacobian
 element        10001  has a negative Jacobian
 element        10002  has a negative Jacobian
 element        10003  has a negative Jacobian
 element        10004  has a negative Jacobian
 element        10005  has a negative Jacobian
 element        10006  has a negative Jacobian
 element        10007  has a negative Jacobian
 element        10008  has a negative Jacobian
 element        10009  has a negative Jacobian
 element        10010  has a negative Jacobian
 element        10011  has a negative Jacobian
 element        10012  has a negative Jacobian
 element        10013  has a negative Jacobian
 element        10014  has a negative Jacobian
 element        10015  has a negative Jacobian
 element        10016  has a negative Jacobian
 element        10017  has a negative Jacobian
 element        10018  has a negative Jacobian
 element        10019  has a negative Jacobian
 element        10020  has a negative Jacobian
 element        10021  has a negative Jacobian
 element        10022  has a negative Jacobian
 element        10023  has a negative Jacobian
 element        10024  has a negative Jacobian
 element        10025  has a negative Jacobian
 element        10026  has a negative Jacobian
 element        10027  has a negative Jacobian
 element        10028  has a negative Jacobian
 element        10029  has a negative Jacobian
 element        10030  has a negative Jacobian
 element        10031  has a negative Jacobian
 element        10032  has a negative Jacobian
 element        10033  has a negative Jacobian
 element        10034  has a negative Jacobian

        3784  elements have a negative Jacobian, out of        12462
 i.e.,    30.364307     %

 ispec =         6251
 ngnod =            9
 node            1  x,y =    566.77489900000000        644.93509200000005     
 node            2  x,y =    563.80868099999998        653.93014900000003     
 node            3  x,y =    572.25548200000003        658.81817999999998     
 node            4  x,y =    575.72179200000005        649.38937199999998     
 node            5  x,y =    565.29178999999999        649.43262100000004     
 node            6  x,y =    568.03208199999995        656.37416499999995     
 node            7  x,y =    573.98863700000004        654.10377600000004     
 node            8  x,y =    571.24834599999997        647.16223200000002     
 node            9  x,y =    569.64021400000001        651.76819799999998     
 negative 2D Jacobian, element saved in DX_first_element_with_negative_jacobian.dx
 Error detected, aborting MPI... proc 
-------------- next part --------------
 Reading the parameter file ... 

 Title of the simulation
 3UF Three Uniform layers                                                                            

 1 1 2000.d0 1000.d0 500.0d0 0 0 10.d0 10.d0 0 0 0 0 0 0
 2 1 2000.d0 1600.d0 800.0d0 0 0 10.d0 10.d0 0 0 0 0 0 0
 3 1 2000.d0 3000.d0 1500.0d0 0 0 10.d0 10.d0 0 0 0 0 0 0

 Nb of solid, fluid or porous materials =            3

 Material #           1  isotropic
 rho,cp,cs =    2000.0000000000000        1000.0000000000000        500.00000000000000        10.000000000000000        10.000000000000000     
 Material is solid

 Material #           2  isotropic
 rho,cp,cs =    2000.0000000000000        1600.0000000000000        800.00000000000000        10.000000000000000        10.000000000000000     
 Material is solid

 Material #           3  isotropic
 rho,cp,cs =    2000.0000000000000        3000.0000000000000        1500.0000000000000        10.000000000000000        10.000000000000000     
 Material is solid


 Parameter file successfully read... 

 Source           1
 Position xs, zs =    500.00000000000000        200.00000000000000     
 Frequency, delay =    6000.0000000000000        0.0000000000000000     
 Source type (1=force, 2=explosion):            1
 Time function type (1=Ricker, 2=First derivative, 3=Gaussian, 4=Dirac, 5=Heaviside):            1
 Angle of the source if force =    0.0000000000000000     
 Mxx of the source if moment tensor =    1.0000000000000000     
 Mzz of the source if moment tensor =    1.0000000000000000     
 Mxz of the source if moment tensor =    0.0000000000000000     
 Multiplying factor =    10000000000.000000     


 The mesh contains        12462  elements

 Control elements have            9  nodes


 Min and max value of X in the grid =    0.0000000000000000        1000.0000000000000     
 Min and max value of Z in the grid =    0.0000000000000000        1000.0000000000000     

 nedges_coupled (acoustic/poroelastic)           0
 nedges_coupled (poroelastic/elastic)           0

 Position (x,z) of the source =    500.00000000000000        200.00000000000000     


 writing the DATA/STATIONS_target file


 There are           10  receivers

 Target positions (x,z) of the           10  receivers

 Receiver            1  =    0.0000000000000000        1000.0000000000000     
 Receiver            2  =    111.11111111111111        1000.0000000000000     
 Receiver            3  =    222.22222222222223        1000.0000000000000     
 Receiver            4  =    333.33333333333331        1000.0000000000000     
 Receiver            5  =    444.44444444444446        1000.0000000000000     
 Receiver            6  =    555.55555555555554        1000.0000000000000     
 Receiver            7  =    666.66666666666663        1000.0000000000000     
 Receiver            8  =    777.77777777777783        1000.0000000000000     
 Receiver            9  =    888.88888888888891        1000.0000000000000     
 Receiver           10  =    1000.0000000000000        1000.0000000000000     

 This will be a serial simulation

-------------- next part --------------
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