Highly variable recurrence of tsunamis in the 7,400 years before the 2004 Indian Ocean tsunami

TitleHighly variable recurrence of tsunamis in the 7,400 years before the 2004 Indian Ocean tsunami
Publication TypeJournal Article
Year of Publication2017
AuthorsRubin C M, Horton BP, Sieh KE, Pilarczyk JE, Daly P, Ismail N, Parnell AC
JournalNature Communications
Volume8
Issue16019
Date Published07/2017
Abstract

The devastating 2004 Indian Ocean tsunami caught millions of coastal residents and the scientific community off-guard. Subsequent research in the Indian Ocean basin has identified prehistoric tsunamis, but the timing and recurrence intervals of such events are uncertain. Here we present an extraordinary 7,400 year stratigraphic sequence of prehistoric tsunami deposits from a coastal cave in Aceh, Indonesia. This record demonstrates that at least 11 prehistoric tsunamis struck the Aceh coast between 7,400 and 2,900 years ago. The average time period between tsunamis is about 450 years with intervals ranging from a long, dormant period of over 2,000 years, to multiple tsunamis within the span of a century. Although there is evidence that the likelihood of another tsunamigenic earthquake in Aceh province is high, these variable recurrence intervals suggest that long dormant periods may follow Sunda megathrust ruptures as large as that of the 2004 Indian Ocean tsunami.

URLhttps://www.nature.com/articles/ncomms16019
DOI10.1038/ncomms16019
Translated TitlePerulangan tsunami yang sangat bervariasi dalam 7400 tahun sebelum Tsunami Samudera Hindia 2004