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

Synthetic Rayleigh wave phase delays and a 3D model of vertically polarised shear wave velocity (Vsv) for the Pacific upper mantle. The data is related to a 2025 paper by Latallerie et al. in Seismica and was last updated on the platform in April 2026. The 3D tomographic grid covers the entire sphere from the surface to ~400km depth with voxels of 2 by 2 degrees laterally and 25 km vertically.

Use Cases

• Testing finite-frequency tomography inversion algorithms based on the SOLA method described.
• Benchmarking seismic tomography results against a known synthetic 3D model (S362ANI).
• Analyzing resolution and uncertainty in upper-mantle shear wave velocity (Vsv) models.
• Studying the propagation of Rayleigh waves across the Pacific hemisphere using synthetic phase delays.

Strengths

• Includes full 3D resolution and uncertainty information for the tomographic model.
• The 3D grid has a defined spatial resolution of 2 by 2 degrees laterally and 25 km vertically.
• Data is explicitly linked to a published 2025 paper and an associated code repository.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and file sizes are unknown, which may limit suitability assessment.
• The data is entirely synthetic, generated for a controlled experiment, not observational.

Provenance

Source

Related to the paper by Latallerie et al., 2025 in Seismica. The organization listed is the British Geological Survey (BGS).

Collection Method

Synthetic phase delays measured on seismograms computed with normal-mode summation (MINEOS) and the SEM solver SPECFEM3DGlobe.

Time Range

Synthetic experiment, no observational time range.

Freshness

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

Geography

Covers the Pacific hemisphere and the whole sphere for the 3D grid, from 89°N to 89°S and 1° to 359° longitude.