The 2009 Samoa–Tonga great earthquake triggered doublet
Lay, T.; Ammon, C.J.; Kanamori, H.; Rivera, L.; Koper, K.D.; Hutko, A.R. (2010). The 2009 Samoa–Tonga great earthquake triggered doublet. Nature (Lond.) 466(7309): 964-968. https://dx.doi.org/10.1038/nature09214
In: Nature: International Weekly Journal of Science. Nature Publishing Group: London. ISSN 0028-0836; e-ISSN 1476-4687, more
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| Keywords |
Hazards > Geological hazards > Earthquakes
ISE, Tonga
Marine/Coastal |
| Authors | | Top |
- Lay, T.
- Ammon, C.J.
- Kanamori, H.
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- Rivera, L.
- Koper, K.D.
- Hutko, A.R.
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| Abstract |
On 29 September 2009, a tsunami devastated the Samoan and northern Tongan islands. Here, an unusual earthquake sequence that preceded this tsunami is analysed. A magnitude-8.1 intraplate faulting event in the outer trench-slope at the northern end of the Tongan subduction zone was followed by extensive interplate faulting, with total moment equivalent to that of a magnitude-8.0 earthquake. Overlap of the seismic signals had obscured the fact that distinct faults had ruptured with different geometries. |
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