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Near-simultaneous great earthquakes at Tongan megathrust and outer rise in September 2009
Beavan, J.; Wang, X.; Holden, C.; Wilson, K.; Power, W.; Prasetya, G.; Bevis, M.; Kautoke, R. (2010). Near-simultaneous great earthquakes at Tongan megathrust and outer rise in September 2009. Nature (Lond.) 466(7309): 959-963. https://dx.doi.org/10.1038/nature09292
In: Nature: International Weekly Journal of Science. Nature Publishing Group: London. ISSN 0028-0836; e-ISSN 1476-4687, meer
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoorden
    Hazards > Geological hazards > Earthquakes
    ISE, Tonga
    Marien/Kust
Auteurs  Top 
  • Beavan, J.
  • Wang, X.
  • Holden, C.
  • Wilson, K.
  • Power, W.
  • Prasetya, G.
  • Bevis, M.
  • Kautoke, R.
Abstract
    On 29 September 2009, a tsunami devastated the Samoan and northern Tongan islands. It is shown here that an unusual earthquake sequence preceded this tsunami. A magnitude-8 earthquake in the outer-rise intraplate region occurred almost simultaneously with rupture of the shallow subduction interplate interface, equivalent to a magnitude-8 earthquake. The findings provide information on strain release mechanisms at subduction zones, and a possible mechanism for the occasional large tsunamis generated at the Tonga subduction zone.
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