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Reconstruction of extreme floods and tsunamis from coastal sedimentary archives in Los Choros, Coquimbo region, 28°S, Chile

Author

Listed:
  • Karen Araya

    (Université Montpellier
    Université de Caen-Normandie
    Centro de Estudios Avanzados en Zonas Áridasridas-CEAZA)

  • Laurent Dezileau

    (Université de Caen-Normandie)

  • Praxedes Muñoz

    (Universidad Católica del Norte
    Centro de Estudios Avanzados en Zonas Áridasridas-CEAZA)

  • Antonio Maldonado

    (Centro de Estudios Avanzados en Zonas Áridasridas-CEAZA
    Universidad de La Serena)

  • Michel Condomines

    (Université Montpellier)

  • Otmane Khalfaoui

    (Université de Caen-Normandie
    University Chouaïb Doukkali)

  • Pablo Oyanadel-Urbina

    (Centro de Estudios Avanzados en Zonas Áridasridas-CEAZA)

  • Benjamin A. Araya

    (Centro de Estudios Avanzados en Zonas Áridasridas-CEAZA)

Abstract

This study used sedimentary archives obtained from a high-standing terrace along the coastal zone of the Coquimbo region to reconstruct past extreme events (floods and tsunamis). Using sedimentological (grain size), geochemical (XRF), and geochronological (14C and 137Cs) analyses, we identified nine flood deposits (1957, 1965, 1984, 1987, 1991, 1997, 2002, 2015, and 2017) and one tsunami deposit (1922). The sedimentary flood record appears complete for the last 70 years and is useful for reconstructing paleoflood events, highlighting the relevance of coastal high-standing terraces to improve our understanding of the frequency of floods in Chilean coastal areas.

Suggested Citation

  • Karen Araya & Laurent Dezileau & Praxedes Muñoz & Antonio Maldonado & Michel Condomines & Otmane Khalfaoui & Pablo Oyanadel-Urbina & Benjamin A. Araya, 2024. "Reconstruction of extreme floods and tsunamis from coastal sedimentary archives in Los Choros, Coquimbo region, 28°S, Chile," 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. 120(12), pages 11323-11347, September.
    • Handle: RePEc:spr:nathaz:v:120:y:2024:i:12:d:10.1007_s11069-024-06644-8
    DOI: 10.1007/s11069-024-06644-8
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    References listed on IDEAS

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    2. Futoshi Nanayama & Kenji Satake & Ryuta Furukawa & Koichi Shimokawa & Brian F. Atwater & Kiyoyuki Shigeno & Shigeru Yamaki, 2003. "Unusually large earthquakes inferred from tsunami deposits along the Kuril trench," Nature, Nature, vol. 424(6949), pages 660-663, August.
    3. Daiwei Wang & Tarik C. Gouhier & Bruce A. Menge & Auroop R. Ganguly, 2015. "Intensification and spatial homogenization of coastal upwelling under climate change," Nature, Nature, vol. 518(7539), pages 390-394, February.
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