Datasets:
| # ===================================================================== | |
| # MIGRATE Synthetic Dataset Metadata | |
| # Dataset: Surfdisp96-Roccastrada-10m | |
| # Author: Nils Schaetti (DMML - HEG Genève) | |
| # License: CC BY-SA 4.0 | |
| # ===================================================================== | |
| dataset_name: "Surfdisp96-Roccastrada-10m" # Unique dataset identifier | |
| dataset_type: "surfdisp" | |
| description: > | |
| This dataset contains synthetic seismic models and their corresponding | |
| Rayleigh-wave dispersion curves generated using forward modeling with | |
| the Roccastrada priors. It is designed for benchmarking inversion | |
| algorithms and training machine learning models in geophysics. | |
| # --------------------------------------------------------------------- | |
| # Priors used to generate the synthetic seismic models | |
| # --------------------------------------------------------------------- | |
| priors: | |
| vs: [0.5, 4.0] # Range of shear-wave velocities (km/s) | |
| z: [0.0, 5.0] # Depth range in kilometers | |
| layers: [2, 20] # Minimum and maximum number of layers | |
| vpvs: 1.3 # Ratio between P-wave and S-wave velocities (Vp/Vs) | |
| mohoest: null # Estimated Moho depth (None for synthetic generation) | |
| mantle: null # Mantle layer properties (not used) | |
| thickmin: 0.1 # Minimum layer thickness in km | |
| lvz: null # Low Velocity Zone (unused) | |
| hvz: null # High Velocity Zone (unused) | |
| # --------------------------------------------------------------------- | |
| # Model-specific parameters for forward simulation | |
| # --------------------------------------------------------------------- | |
| model_parameters: | |
| dispersion_curve_length: 108 # Number of samples per dispersion curve | |
| # --------------------------------------------------------------------- | |
| # Fold configuration for cross-validation splits | |
| # --------------------------------------------------------------------- | |
| folds: | |
| available: ["2-fold", "5-fold", "10-fold"] # Supported fold configurations | |
| fold_file: "folds.json" # File describing shard allocation per fold | |
| # --------------------------------------------------------------------- | |
| # File format and dataset metadata | |
| # --------------------------------------------------------------------- | |
| format: "parquet" # Dataset stored in Apache Parquet format | |
| license: "CC BY-SA 4.0" # Dataset license (Creative Commons Attribution-ShareAlike 4.0) | |
| created_by: "Nils Schaetti" # Creator or generating system | |
| creation_date: "2025-09-16 15:39:27" # Timestamp of dataset generation | |
| # --------------------------------------------------------------------- | |
| # Parameters for synthetic data generation | |
| # --------------------------------------------------------------------- | |
| generation: | |
| seed: 43 # Random seed for reproducibility | |
| random_generator: "numpy.default_rng" # RNG backend used | |
| n_samples: 10000 # Total number of synthetic samples | |
| samples_per_shard: 1000 # Samples per Parquet shard | |
| n_shards: 10 # Total number of shards | |
| source: "sample_model + forward" # Generation method (sampling + forward simulation) | |
| # --------------------------------------------------------------------- | |
| # Feature schema describing structure of each record | |
| # --------------------------------------------------------------------- | |
| features: | |
| vs: | |
| type: "list<float32>" # List of shear-wave velocities (per layer) | |
| variable_length: true # Number of layers varies per sample | |
| z: | |
| type: "list<float32>" # Depth boundaries (km) for each layer | |
| variable_length: true # Same variable-length structure as 'vs' | |
| h: | |
| type: "list<float>" # Layer thickness (km), depends on prior | |
| variable_length: true # Depends on the number of layers | |
| vp: | |
| type: "list<float>" # P-wave velocities per layer (km/s) | |
| variable_length: true # Same variable-length structure as 'vs' | |
| vpvs: | |
| type: "float32" # Single scalar value (Vp/Vs ratio) | |
| nlayers: | |
| type: 'int' # Number of layers | |
| velmap_vs: | |
| type: 'list<float>' # Shear velocitiy profile (vs) interpolated (flat) to 60 points | |
| length: 60 | |
| velmap_z: | |
| type: 'list<float>' # Depth grid corresponding to velmap_vs | |
| length: 60 | |
| # Low Range Dispersion Curve | |
| L_disp_x: | |
| type: "list<float32>" # Periods or frequencies (x-axis of dispersion curve) | |
| length: 108 # Fixed number of samples per curve | |
| L_disp_y: | |
| type: "list<float32>" # Phase or group velocities (y-axis of dispersion curve) | |
| length: 108 # Same fixed length as disp_x | |
| L_wave_type: | |
| type: "string" # Type of surface wave (e.g., Rayleigh, Love) | |
| L_velocity_type: | |
| type: "string" # Type of velocity model (e.g., Vs, Vp, Vp/Vs) | |
| # Middle Range Dispersion Curve | |
| M_disp_x: | |
| type: "list<float32>" # Periods or frequencies (x-axis of dispersion curve) | |
| length: 108 # Fixed number of samples per curve | |
| M_disp_y: | |
| type: "list<float32>" # Phase or group velocities (y-axis of dispersion curve) | |
| length: 108 # Same fixed length as disp_x | |
| M_wave_type: | |
| type: "string" # Type of surface wave (e.g., Rayleigh, Love) | |
| M_velocity_type: | |
| type: "string" # Type of velocity model (e.g., Vs, Vp, Vp/Vs) | |
| # High Range Dispersion Curve | |
| H_disp_x: | |
| type: "list<float32>" # Periods or frequencies (x-axis of dispersion curve) | |
| length: 108 # Fixed number of samples per curve | |
| H_disp_y: | |
| type: "list<float32>" # Phase or group velocities (y-axis of dispersion curve) | |
| length: 108 # Same fixed length as disp_x | |
| H_wave_type: | |
| type: "string" # Type of surface wave (e.g., Rayleigh, Love) | |
| H_velocity_type: | |
| type: "string" # Type of velocity model (e.g., Vs, Vp, Vp/Vs) | |