Seismic and geomorphic assessment for coseismic landslides zonation in tropical volcanic contexts

Mario Arroyo-Solórzano (), Adolfo Quesada-Román and Gustavo Barrantes-Castillo
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Mario Arroyo-Solórzano: Universidad Politécnica de Madrid
Adolfo Quesada-Román: Universidad de Costa Rica
Gustavo Barrantes-Castillo: Universidad Nacional, Costa Rica

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2022, vol. 114, issue 3, No 17, 2837 pages

Abstract: Abstract The Poás volcano is an active volcano of Costa Rica with intense tectonic activity in its flanks. Historically, the volcano has presented strong, surficial earthquakes provoking many landslides with associated casualties and immense economic impacts. One example is the Cinchona earthquake in 2009 (Mw 6.2 and 4.6 km depth). We aim to determine a landslide zonation according to seismic data and a geomorphic assessment in the NW sector of the Poás volcano based on a combination of qualitative methods and morphometric parameters. The results estimate the possible outcome of a 6.8 Mw earthquake. The susceptibility mapping and models showed a positive relationship between this methodology and others previously developed for the area that surrounds the Poás volcano as well as a correspondence with the landslides caused by the Cinchona earthquake in 2009. The final coseismic landslides susceptibility zoning indicated that 52% of the area is prone to landslides. Furthermore, there is a relationship between the areas with high exposure to landslides with conical volcanic geomorphologies, active faulting structural and/or tectonic geomorphological units with slopes greater than 15°. The proposed zoning can be useful for land use planning and by civil protection entities to orientate quick response and reduce the impact of future landslides. Moreover, this method can be applied in active tectonic and volcanic areas worldwide.

Keywords: Coseismic landslides; Susceptibility; Central America; Poás volcano; Seismicity; Tectonic geomorphology (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1007/s11069-022-05492-8

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