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Version devBuilt at: 2026-10-16 08:00:47 EDT

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Accurately ACROSS source and seismic array configuration. (a) Locations of the ACROSS source (red star), seismic array (black squares; individual seismometers denoted by white stars) and a nearby Hi-net station called N.MRIH (Morimachi) (blue dot). Map data were provided by the Geospatial Information Authority of Japan and Google Earth. (b) ACROSS source used in this study. The photograph shows the above-ground part of the ACROSS source, whereas its eccentric mass is underground.
Southern California relocated seismicity with magnitude = 0.0–7.3 between 1981 and 2023. Please see the paper for the full caption.
Division of active-tectonic blocks in Tibetan Plateau and its adjacent regions. Thin grey lines are active faults compiled by M. Taylor & A. Yin (2009). The data display the contemporary crustal stress orientation in the upper 40 km based on the WSM database release 2016. Lines indicate the orientation of maximum horizontal stress (SHmax) from different stress indicators, represented by distinct symbols. Colours of the symbols and lines indicate the stress regime with red for normal faulting (NF), green for strike-slip (SS), blue for thrust faulting (TF) and black for unknown (U) stress regime.
(a) Map of our study area (delimited by the red rectangle) on a background of the geologic-tectonic age provinces (U.G. Cordani et al. 2016) of South America. Cratonic nuclei are contoured by black dashed lines. Nuclei outside the study area: PBa—Parnaíba basin (ANP—https://geomaps.anp.gov.br/geoanp/); LACr—Luis Alves craton, PaBI- Paranapanema block, RACr—Rio Apa craton, with outlines based on G.M.P.C. Affonso et al. (2021). PrBI—Parnaíba block, GrBl—Granja block, SLCr—São Luís craton, with outlines based on G.M.P.C. Affonso et al. (2025). Other nuclei are the RPCr—Rio de la Plata craton (U.G. Cordani et al. 2016), ACr—Amazonian craton (M.J.B. Macambira et al. 2020) and the SFCr—São Francisco craton (F.F. Alkmim & M.A. Martins-Neto 2012). BP—Borborema Province from U.G. Cordani et al. (2016). (b) Map zoom into the study area, with the tectonic entities: SeBe- Sergipano belt, RPoBe—Riacho do Pontal belt, RPBe—Rio Preto belt, BrBe—Brasília belt, RbBe—Ribeira belt and ArBe—Araçuaí belt (M. Heilbron et al. 2017); in red is the SFCrN—São Francisco craton northern limits from G.M.P.C. Affonso et al. (2025); in orange are is the SFPB—São Francisco Paleocontinental block (M.P. Rocha et al. 2019); ACSu—Abre Campo suture, in green, and the OLS—Oceanic lithosphere subduction, in purple, from F.F. Alkmim et al. (2006). Coloured triangles indicate seismological stations used by this study.
Global marine vertical gravity gradients derived from SWOT altimetry. Global distribution of marine VGG recovered from SWOT altimetry. The map highlights major mid-ocean ridge systems, fracture zones, trench structures and seamount-related short-wavelength gravity signals. Yellow polygon is the Izu–Ogasawara Trench. The unit is E.