Earthquakes occur in cool, foundering tectonic plates deep within the Earth. But seismic data from the southwestern Pacific indicate that the minerals that make up the plates at depth don't behave as if they are cool.
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Helffrich, G. Trouble under Tonga?. Nature 436, 637–638 (2005). https://doi.org/10.1038/436637a
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DOI: https://doi.org/10.1038/436637a
