added a check that MIN_PERIOD < MAX_PERIOD; also updated comments in …

…the Par_files

EXAMPLES/BENCHMARK_CLAERBOUT_ADJOINT/ACOUSTIC/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/BENCHMARK_CLAERBOUT_ADJOINT/ELASTIC/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/CPML_examples/homogeneous_halfspace_HEX8_acoustic_absorbing_CPML_5sides/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/CPML_examples/homogeneous_halfspace_HEX8_acoustic_absorbing_CPML_6sides/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/CPML_examples/homogeneous_halfspace_HEX8_acoustic_elastic_absorbing_CPML_5sides/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/CPML_examples/homogeneous_halfspace_HEX8_acoustic_elastic_absorbing_CPML_6sides/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/CPML_examples/homogeneous_halfspace_HEX8_elastic_absorbing_CPML_5sides/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/CPML_examples/homogeneous_halfspace_HEX8_elastic_absorbing_CPML_6sides/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/Mount_StHelens/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/fault_examples/splay_faults/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/fault_examples/tpv102/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/fault_examples/tpv103/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/fault_examples/tpv15/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/fault_examples/tpv16/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/fault_examples/tpv5/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/homogeneous_acoustic/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .true.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/homogeneous_halfspace_HEX27_elastic_no_absorbing/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/homogeneous_halfspace_HEX8_elastic_absorbing_Stacey_5sides/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/homogeneous_halfspace_HEX8_elastic_no_absorbing/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/homogeneous_poroelastic/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/homogeneous_poroelastic/DATA/Par_file_coarse

@@ -226,9 +226,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/layered_halfspace/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/meshfem3D_examples/cavity/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/meshfem3D_examples/many_interfaces/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/meshfem3D_examples/sep_bathymetry/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/meshfem3D_examples/simple_model/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/meshfem3D_examples/socal1D/DATA/Par_file

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/meshfem3D_examples/socal1D/example_utm/Par_file_utm

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/noise_tomography/DATA/Par_file_step1

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/noise_tomography/DATA/Par_file_step2

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------

EXAMPLES/noise_tomography/DATA/Par_file_step3

@@ -231,9 +231,9 @@ USE_TRICK_FOR_BETTER_PRESSURE   = .false.
 #
 #-----------------------------------------------------------
 # to plot total energy curves, for instance to monitor how CPML absorbing layers behave;
-# should be turned OFF in most cases because expensive
+# should be turned OFF in most cases because a bit expensive
 OUTPUT_ENERGY                   = .false.
-# every how many time steps we compute energy (which is expensive to compute)
+# every how many time steps we compute energy (which is a bit expensive to compute)
 NTSTEP_BETWEEN_OUTPUT_ENERGY    = 10
 
 #-----------------------------------------------------------