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American Association for the Advancement of Science, Science, 6340(356), p. 841-844, 2017

DOI: 10.1126/science.aal3429

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Release of mineral-bound water prior to subduction tied to shallow seismogenic slip off Sumatra

Journal article published in 2017 by Andre Hüpers ORCID, Marta E. Torres ORCID, Hugo F. A. Pouderoux ORCID, Yehua Shan ORCID, Insun Song ORCID, Paola Vannucchi, Peter J. Vrolijk, Tao Yang ORCID, Xixi Zhao, Satoko Owari ORCID, Lisa C. McNeill ORCID, Brandon Dugan ORCID, Timothy J. Henstock ORCID, Kitty L. Milliken ORCID, Katerina E. Petronotis ORCID and other authors.
This paper is available in a repository.
This paper is available in a repository.

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Abstract

Sediments tell a tsunami story Trying to understand where major earthquakes and tsunamis might occur requires analysis of the sediments pouring into a subduction zone. Thick sediments were expected to limit earthquake and tsunami size in the Sumatran megathrust event in 2004, but the magnitude 9.2 earthquake defied expectations. Hüpers et al. analyzed sediments recovered from the Sumatran megathrust. They found evidence of sediment dehydration, which increased fault strength and allowed for the much larger earthquake to occur. Thus, models of other subduction zones, such as the Gulf of Alaska, may underestimate the maximum earthquake magnitude and tsunami risk. Science , this issue p. 841