Browsing by Author "Castro, Sebastián"
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Item A Consistently Processed Strong-Motion Database for Chilean Earthquakes(2022) Castro, Sebastián; Benavente, Roberto; Crempien, Jorge G.F.; Candia, Gabriel; Llera, Juan Carlos de laSince the 1985 M 8.0 central Chile earthquake, national strong‐motion seismic networks have recorded ten megathrust earthquakes with magnitudes greater than M 7.5 at the convergent margin, defined by the contact between the Nazca and South American plates. The analysis of these earthquake records have led to improved hazard analyses and design codes for conventional and seismically protected structures. Although strong‐motion baseline correction is required for a meaningful interpretation of these records, correction methods have not been applied consistently in time. The inconsistencies between correction methods have been neglected in the practical use of these records in practice. Consequently, this work aims to provide a new strong‐motion database for researchers and engineers, which has been processed by traceable and consistent data processing techniques. The record database comes from three uncorrected strong motion Chilean databases. All the records are corrected using a four‐step novel methodology, which detects the P‐wave arrival and introduces a baseline correction based on the reversible‐jump Markov chain Monte Carlo method. The resulting strong motion database has more than 2000 events from 1985 to the date, and it is available to download at the Simulation Based Earthquake Risk and Resilience of Interdependent Systems and Networks (SIBER‐RISK) project website.Item Children's views on evacuation drills and school preparedness: Mapping experiences and unfolding perspectives(2018) Vásquez, Andrea; Marinkovic, Katitza; Bernales, Margarita; León, Jorge; González, Juan; Castro, SebastiánIntroduction and purpose of this study: Colegio Ingles is the largest and oldest school in the city of Iquique, the capital of Chile's northern Tarapaca Region. In accordance with the School Evacuation Plan, a drill was held in 2013 with the entire student body (n = 1600). The majority of the students had experienced the 2014 Pisagua earthquake. Considering the school's exposure to natural disasters and the experience of its students, we studied the perspectives of k-12 students relative to their school's evacuation plan for a major disaster, such as an earthquake and a tsunami. Materials and methods: The study applied a qualitative methodology for in-depth exploration and insight into the students’ perceptions of the school evacuation plan. The methods applied were: (i) focus groups and (ii) individual mapping exercises. The participants recruited (n = 31), included children between the ages of 11 and 18 years old. The collected information was analyzed through a thematic analysis using NVivo 11 software. Results: The results flagged significant issues that had not been considered during the development of the school evacuation plan, such as the family dimension, which in some cases is contradictory with the school evacuation plan, as well as the need of redefining the safe zones from a multidimensional perspective. Conclusions: More participation from children in the local planning of the school evacuation plan was seen as necessary in order to strengthen their preparedness in case of disaster, integrating their school evacuation plan and their family ones.