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Partial rupture of a locked patch of the Sumatra megathrust during the 2007 earthquake sequence

Author

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  • A. Ozgun Konca

    (Tectonics Observatory, California Institute of Technology, Pasadena, California 91125, USA)

  • Jean-Philippe Avouac

    (Tectonics Observatory, California Institute of Technology, Pasadena, California 91125, USA)

  • Anthony Sladen

    (Tectonics Observatory, California Institute of Technology, Pasadena, California 91125, USA)

  • Aron J. Meltzner

    (Tectonics Observatory, California Institute of Technology, Pasadena, California 91125, USA)

  • Kerry Sieh

    (Tectonics Observatory, California Institute of Technology, Pasadena, California 91125, USA
    Present address: Earth Observatory of Singapore, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore.)

  • Peng Fang

    (Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, USA)

  • Zhenhong Li

    (COMET, University of Glasgow)

  • John Galetzka

    (Tectonics Observatory, California Institute of Technology, Pasadena, California 91125, USA)

  • Jeff Genrich

    (Tectonics Observatory, California Institute of Technology, Pasadena, California 91125, USA)

  • Mohamed Chlieh

    (Geosciences Azur, Université de Nice Sophia-Antipolis, Institut de Recherche pour le Développement, Observatoire de la Cote d’Azurrue, 06560 Valbonne, France)

  • Danny H. Natawidjaja

    (Tectonics Observatory, California Institute of Technology, Pasadena, California 91125, USA)

  • Yehuda Bock

    (Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, USA)

  • Eric J. Fielding

    (Jet Propulsion Laboratory, M.S. 300-233, California Institute of Technology, Pasadena, California 91109, USA)

  • Chen Ji

    (University of California, Santa Barbara, California 94106)

  • Don V. Helmberger

    (Tectonics Observatory, California Institute of Technology, Pasadena, California 91125, USA)

Abstract

Seismic stress at Mentawai In March 2005, just south of the rupture area of the 2004 great Sumatra-Andaman earthquake, the magnitude 8.6 Sunda megathrust earthquake occurred. Concern then focused further south on the Mentawai area, where large earthquakes had occurred in 1797 and 1833. A magnitude 8.4 and, twelve hours later, a magnitude 7.9 earthquake did indeed occur in September 2007. Konca et al. now show that the 2007 seismic crisis released only a fraction of the elastic strain that had accumulated since the events of 1797 and 1833, with the same portion of the megathrust rupturing in different patterns depending on local factors. The potential for a large megathrust event in the Mentawai area is therefore still high.

Suggested Citation

  • A. Ozgun Konca & Jean-Philippe Avouac & Anthony Sladen & Aron J. Meltzner & Kerry Sieh & Peng Fang & Zhenhong Li & John Galetzka & Jeff Genrich & Mohamed Chlieh & Danny H. Natawidjaja & Yehuda Bock & , 2008. "Partial rupture of a locked patch of the Sumatra megathrust during the 2007 earthquake sequence," Nature, Nature, vol. 456(7222), pages 631-635, December.
    • Handle: RePEc:nat:nature:v:456:y:2008:i:7222:d:10.1038_nature07572
    DOI: 10.1038/nature07572
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    Cited by:

    1. Wahyu Triyoso & Aris Suwondo, 2023. "From the geodynamic aspect to earthquake potential hazard analysis of Liwa city and its surrounding," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 116(1), pages 1329-1344, March.
    2. H. Taubenböck & N. Goseberg & G. Lämmel & N. Setiadi & T. Schlurmann & K. Nagel & F. Siegert & J. Birkmann & K.-P. Traub & S. Dech & V. Keuck & F. Lehmann & G. Strunz & H. Klüpfel, 2013. "Risk reduction at the “Last-Mile”: an attempt to turn science into action by the example of Padang, Indonesia," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 65(1), pages 915-945, January.
    3. George Priest & Chris Goldfinger & Kelin Wang & Robert Witter & Yinglong Zhang & António Baptista, 2010. "Confidence levels for tsunami-inundation limits in northern Oregon inferred from a 10,000-year history of great earthquakes at the Cascadia subduction zone," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 54(1), pages 27-73, July.
    4. Muhammad Taufiq Rafie & David P. Sahara & Phil R. Cummins & Wahyu Triyoso & Sri Widiyantoro, 2023. "Stress accumulation and earthquake activity on the Great Sumatran Fault, Indonesia," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 116(3), pages 3401-3425, April.

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