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Dr. Aranguiz-Muñoz, Rafael
Nombre de publicación
Dr. Aranguiz-Muñoz, Rafael
Nombre completo
Aranguiz Muñoz, Rafael Enrique
Facultad
Email
raranguiz@ucsc.cl
ORCID
2 results
Research Outputs
Now showing 1 - 2 of 2
- PublicationWhat can we do to forecast tsunami hazards in the near field given large epistemic uncertainty in rapid seismic source inversions?(American Geophysical Union (AGU), 2018)
;Cienfuegos, Rodrigo ;Catalán, Patricio A. ;Urrutia, Alejandro ;Benavente, Roberto; González, GabrielThe variability in obtaining estimates of tsunami inundation and runup on a near‐real‐time tsunami hazard assessment setting is evaluated. To this end, 19 different source models of the Maule Earthquake were considered as if they represented the best available knowledge an early tsunami warning system could consider. Results show that large variability can be observed in both coseismic deformation and tsunami variables such as inundated area and maximum runup. This suggests that using single source model solutions might not be appropriate unless categorical thresholds are used. Nevertheless, the tsunami forecast obtained from aggregating all source models is in good agreement with observed quantities, suggesting that the development of seismic source inversion techniques in a Bayesian framework or generating stochastic finite fault models from a reference inversion solution could be a viable way of dealing with epistemic uncertainties in the framework of nearly‐real‐time tsunami hazard mapping. - PublicationThe 1 April 2014 Pisagua tsunami: Observations and modeling(ResearchGate, 2015)
;Catalán, Patricio; ;González, Gabriel ;Tomita, Takashi ;Cienfuegos, Rodrigo ;González, Juan ;Shrivastava, Mahesh N. ;Kumagai, Kentaro ;Mokrani, Cyril ;Cortés, PabloGubler, AlejandraOn 1 April 2014, an earthquake with moment magnitudeMw8.2 occurred off the coast ofnorthern Chile, generating a tsunami that prompted evacuation along the Chilean coast. Here tsunamicharacteristics are analyzed through a combination of field data and numerical modeling. Despite theearthquake magnitude, the tsunami was moderate, with a relatively uniform distribution of runup, whichpeaked at 4.6 m. This is explained by a concentrated maximal slip at intermediate depth on the megathrust,resulting in a rapid decay of tsunami energy. The tsunami temporal evolution varied, with locations showingsustained tsunami energy, while others showed increased tsunami energy at different times after theearthquake. These are the result of the interaction of long period standing oscillations and trapped edgewave activity controlled by inner shelf slopes. Understanding these processes is relevant for the region,which still posses a significant tsunamigenic potential