Seismic and geomorphic assessment for coseismic landslides zonation in tropical volcanic contexts
artículo original
Date
2022-08Author
Arroyo Solórzano, Mario
Quesada Román, Adolfo
Barrantes Castillo, Gustavo
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Show full item recordAbstract
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.
External link to the item
10.1007/s11069-022-05492-8Collections
- Geografía [231]