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Science  20 Aug 1999:
Vol. 285, Issue 5431, pp. 1175
DOI: 10.1126/science.285.5431.1175e

Like banging a giant gong, the powerful earthquake that rocked Bolivia on 9 June 1994 triggered oscillations that reverberated through the entire planet. A Research Article on p. 1231 draws on data from that magnitude 8.3 event to model the density of Earth's mantle. Additional mantle models with various starting parameters and resolutions are online at www.sciencemag.org/feature/data/1040466.shl

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