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Adjoint-State Traveltime Tomography (tomoatt.com)

Description: 

Adjoint-state traveltime tomography is an efficient approach for determining subsurface seismic structures (Vp, Vs, anisotropy) and earthquake locations using body wave traveltime data. One remarkable feature of this approach is its independence from ray tracing. TomoATT is the software package that implements adjoint-state traveltime inversions. The package’s first version, designed for non-commercial use in scientific community, is now ready for release. TomoATT grants users the flexibility to choose the specific type(s) of traveltime data they wish to employ. Whether it be absolute arrival times, common-source differential arrival times, or common-receiver differential arrival times, users can utilize them simultaneously or separately to infer velocity structures and/or earthquake locations. TomoATT stands out for its multilevel hybrid parallelization technique, which incorporates source parallelization, subdomain parallelization, hyperplane stepping parallel fast sweeping, and Single Instruction, Multiple Data (SIMD) optimization for multiple CPU architectures (AVX2, AVX-512 and ARM-SVE). This innovative approach significantly enhances computational efficiency and empowers the package to tackle super large-scale problems effectively. TomoATT is a user-friendly software package. Users only need to input traveltime data in a pre-defined format, and the software will execute with minimal user interference. The usage of the software package, TomoATT, can be found at www.tomoatt.com. Notably, adjoint-state traveltime tomography has also been extended to invert surface wave traveltime data for seismic velocity and anisotropy.

Session: 3D Wavefield Simulations: From Seismic Imaging to Ground Motion Modelling - III

Type: Oral

Date: 5/2/2024

Presentation Time: 03:00 PM (local time)

Presenting Author: Ping

Student Presenter: No

Invited Presentation: 

Authors