Nabro 3D Velocity Model and Relocated Earthquake Catalogue

Three 3D velocity models for P-wave, S-wave, and Vp/Vs ratio produced by the FMTOMO tomography algorithm for the Nabro volcano caldera in Eritrea. The models are accompanied by a relocated earthquake catalogue containing hypocenter locations and errors. The data originates from seismic waveforms collected by the Nabro Urgency Array and was produced by researchers at the University of Oxford in 2023.

Use Cases

• Visualize subsurface velocity structure based on the 3D Vp, Vs, and Vp/Vs ratio grids.
• Analyze spatial relationships between earthquake hypocenters and velocity anomalies mentioned in the description.
• Validate or compare tomographic inversion methods using the output from the FMTOMO code.
• Study the magmatic and hydrothermal system of the recently erupted Nabro volcano based on the seismic models.

Strengths

• Includes three distinct 3D models (Vp, Vs, Vp/Vs) for a comprehensive geophysical view.
• Accompanied by a relocated earthquake catalogue with depth, latitude, longitude, and error estimates.
• Based on publicly available seismic waveform data from the Nabro Urgency Array.
• The FMTOMO software package used to generate the models is freely available for download.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Row count for the velocity grids and event catalogue is unknown, which may limit suitability assessment.
• Column-level documentation for the velocity model files is absent; field semantics must be inferred from the provided pseudocode.

Provenance

Source

University of Oxford

Collection Method

Inversion of seismic waveforms using the FMTOMO tomography algorithm.

Geography

Nabro volcano caldera, Eritrea