Synthetic Rayleigh Wave Phase Delays and Vsv Upper-Mantle Structure in the Pacific

Synthetic Rayleigh wave phase delays measured on vertical component seismograms for earthquake-receiver pairs across the Pacific hemisphere. The dataset includes a 3D model of vertically polarised shear wave velocity (Vsv) structure, with full 3D resolution and uncertainty, on a global grid with 2-degree lateral and 25 km vertical voxels from the surface to ~400 km depth. This data and inversion results are related to a 2025 paper in Seismica by Latallerie et al. and were last updated on 2026-04-09.

Use Cases

• Benchmarking tomography inversion algorithms based on synthetic phase delays and a known 3D velocity model.
• Analyzing resolution and uncertainty in upper-mantle seismic models based on the provided 3D resolution and uncertainty data.
• Studying Rayleigh wave dispersion patterns in the Pacific hemisphere based on the synthetic phase delay measurements.
• Testing forward modeling software (e.g., MINEOS, SPECFEM3DGlobe) against a published synthetic dataset.

Strengths

• Includes full 3D resolution and uncertainty estimates for the tomographic model.
• Voxel grid is defined with specific dimensions: 2 by 2 degrees laterally and 25 km vertically, spanning the globe from the surface to ~400 km depth.
• Synthetic data is derived from established reference models (stw105) and 3D models (S362ANI) using recognized software (MINEOS, SPECFEM3DGlobe).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and file formats are unknown, which may limit suitability assessment.
• Data is synthetic, not observational, limiting direct application to real-world seismic analysis.

Provenance

Source

Related to the paper by Latallerie et al., 2025 in Seismica. Hosted by the British Geological Survey (BGS) on uk_data.

Collection Method

Synthetic phase delays measured on seismograms computed via normal-mode summation (MINEOS) and spectral-element method (SPECFEM3DGlobe).

Time Range

Synthetic study; no real temporal coverage.

Freshness

Last updated 2026-04-09 08:27:31.016342; freshness should be verified.

Geography

Global, with specific focus on the Pacific hemisphere.