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: [[Seismic Wave|Seismic]] detectors can be used to observe [[S-wave]]s at different locations on [[Earth]] during an [[earthquake]] and this information can be used to determine the structure of the [[Earth]].
: [[S-wave]]s do not travel through the [[Earth's Core|core]] of the [[Earth]] which is [[Scientific Evidence|evidence]] that the [[Earth's Core|core]] must be a [[liquid]].
===References===
====AQA====
:[https://www.amazon.co.uk/gp/product/0008158770/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158770&linkCode=as2&tag=nrjc-21&linkId=ec31595e720e1529e49876c3866fff6e ''S wave, pages 210-11, GCSE Physics; Student Book, Collins, AQA '']