{"id":24960779,"url":"https://github.com/schipp/azimuthal_anisotropy","last_synced_at":"2025-04-10T21:13:58.170Z","repository":{"id":192123324,"uuid":"264389474","full_name":"schipp/azimuthal_anisotropy","owner":"schipp","description":"Retrieve azimuthal anisotropy of surface waves from inter-station measurements, following Schippkus et al. 2020","archived":false,"fork":false,"pushed_at":"2021-05-03T09:13:57.000Z","size":2122,"stargazers_count":8,"open_issues_count":0,"forks_count":3,"subscribers_count":1,"default_branch":"master","last_synced_at":"2025-04-10T21:13:52.301Z","etag":null,"topics":["anisotropy","open-science","seismic-ambient-noise","seismic-processing","seismology"],"latest_commit_sha":null,"homepage":"https://doi.org/10.1093/gji/ggz565","language":"Python","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/schipp.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null}},"created_at":"2020-05-16T08:09:21.000Z","updated_at":"2025-02-06T14:56:13.000Z","dependencies_parsed_at":"2023-09-02T18:54:33.208Z","dependency_job_id":null,"html_url":"https://github.com/schipp/azimuthal_anisotropy","commit_stats":null,"previous_names":["schipp/azimuthal_anisotropy"],"tags_count":1,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/schipp%2Fazimuthal_anisotropy","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/schipp%2Fazimuthal_anisotropy/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/schipp%2Fazimuthal_anisotropy/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/schipp%2Fazimuthal_anisotropy/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/schipp","download_url":"https://codeload.github.com/schipp/azimuthal_anisotropy/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":248298312,"owners_count":21080320,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["anisotropy","open-science","seismic-ambient-noise","seismic-processing","seismology"],"created_at":"2025-02-03T08:31:25.868Z","updated_at":"2025-04-10T21:13:58.132Z","avatar_url":"https://github.com/schipp.png","language":"Python","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Azimuthal anisotropy from inter-station velocity measurements\n\n[![DOI](https://zenodo.org/badge/264389474.svg)](https://zenodo.org/badge/latestdoi/264389474)\n\nDetermine the 2-Theta and 4-Theta terms of azimuthal anisotropy from inter-station group-velocity residuals in overlapping cells. This methodology is established in Schippkus et al. (2020), but the original version used in the paper requires the specific output of a specific isotropic inversion code, relying on the parametrization of the isotropic inversion. This new version is based purely on a .csv file of station-pair locations and inter-station group-velocity residuals.\n\nFormat of the header-less `.csv` input: `lat1, lon1, lat2, lon2, vel`\n\n[1] Schippkus, S., Zigone, D., Bokelmann, G., AlpArray Working Group. (2020). Azimuthal anisotropy in the wider Vienna basin region: a proxy for the present-day stress field and deformation. Geophysical Journal International, 220(3), 2056–2067. http://doi.org/10.1093/gji/ggz565\n\n## Requirements\n\n- Python 3.5+\n- Numpy\n- Matplotlib\n- Obspy (https://github.com/obspy/obspy/wiki)\n- Shapely (https://pypi.org/project/Shapely/)\n\n## TODO\n\n- [x] Implement weighted average using path-lengths within cells.\n- [ ] Actually test with real data.\n- [ ] Synthetic example that can handle varying anisotropy.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fschipp%2Fazimuthal_anisotropy","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fschipp%2Fazimuthal_anisotropy","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fschipp%2Fazimuthal_anisotropy/lists"}