Geodynamic conditions resulting from the earthquake and tsunami of 2010 on the coast of central Chile. The case of Pichilemu

Soto, María-Victoria; Arriagada, Joselyn; Castro-Correa, Carmen Paz; Ibarra, Ignacio; Rodolfi, Giuliano

Abstract

The earthquake and tsunami of 2010, triggered changes in the geomorphological and sedimentary dynamics along the coast of Pichilemu, in central Chile. These changes were evidenced through the retreat and erosion of sandy beaches and coastal sand dunes. Modification patterns were identified through analysis of satellite images prior to and after the earthquake/tsunami, and compared with records from geomorphological fieldwork carried out in 2004 that measured essential features of representative beach profiles in the headland bay beaches. The variability of beaches dominated by waves was analyzed. The results indicate that there is coastal erosion and a change in the sedimentary balance associated with the subsidence of the coast, and that four years after the earthquake/tsunami, after the erosive phase, a change in tendency towards progradation of sandy coastlines in the headland bay beaches can be observed

Citation

Soto, M.-V., Arriagada, J., Castro-Correa, C. P., Ibarra, I., & Rodolfi, G. (2015). Geodynamic conditions resulting from the earthquake and tsunami of 2010 on the coast of central Chile. The case of Pichilemu. Revista de geografía Norte Grande (En línea), 79-95. https://doi.org/10.4067/s0718-34022015000100005

• Journal Article Type: Article
• Acceptance Date: Apr 1, 2015
• Online Publication Date: May 1, 2015
• Publication Date: 2015-05
• Deposit Date: Jan 28, 2021
• Journal: Revista de geografía Norte Grande
• Print ISSN: 0379-8682
• Electronic ISSN: 0718-3402
• Peer Reviewed: Peer Reviewed
• Issue: 60
• Pages: 79-95
• DOI: https://doi.org/10.4067/s0718-34022015000100005
• Public URL: https://durham-repository.worktribe.com/output/1247209