{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Li Z"],"funding":["European Research Council"],"pagination":["2787"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC9120171"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["13(1)"],"pubmed_abstract":["The lowermost mantle right above the core-mantle boundary is highly heterogeneous containing multiple poorly understood seismic features. The smallest but most extreme heterogeneities yet observed are 'Ultra-Low Velocity Zones' (ULVZ). We exploit seismic shear waves that diffract along the core-mantle boundary to provide new insight into these enigmatic structures. We measure a rare core-diffracted signal refracted by a ULVZ at the base of the Hawaiian mantle plume at unprecedentedly high frequencies. This signal shows remarkably longer time delays at higher compared to lower frequencies, indicating a pronounced internal variability inside the ULVZ. Utilizing the latest computational advances in 3D waveform modeling, here we show that we are able to model this high-frequency signal and con"],"journal":["Nature communications"],"pubmed_title":["Kilometer-scale structure on the core-mantle boundary near Hawaii."],"pmcid":["PMC9120171"],"funding_grant_id":["No.804071-ZoomDeep","804071"],"pubmed_authors":["Li Z","Cottaar S","Leng K","Jenkins J"],"additional_accession":[]},"is_claimable":false,"name":"Kilometer-scale structure on the core-mantle boundary near Hawaii.","description":"The lowermost mantle right above the core-mantle boundary is highly heterogeneous containing multiple poorly understood seismic features. The smallest but most extreme heterogeneities yet observed are 'Ultra-Low Velocity Zones' (ULVZ). We exploit seismic shear waves that diffract along the core-mantle boundary to provide new insight into these enigmatic structures. We measure a rare core-diffracted signal refracted by a ULVZ at the base of the Hawaiian mantle plume at unprecedentedly high frequencies. This signal shows remarkably longer time delays at higher compared to lower frequencies, indicating a pronounced internal variability inside the ULVZ. Utilizing the latest computational advances in 3D waveform modeling, here we show that we are able to model this high-frequency signal and con","dates":{"release":"2022-01-01T00:00:00Z","publication":"2022 May","modification":"2025-04-22T00:29:52.859Z","creation":"2025-04-05T19:34:09.077Z"},"accession":"S-EPMC9120171","cross_references":{"pubmed":["35589765"],"doi":["10.1038/s41467-022-30502-5"]}}