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A consistently processed strong-Motion database for Chilean earthquakes
Castro, Sebastián
Crempien, Jorge
Candia, Gabriel
De la Llera, Juan
Seismological Research Letters
2022
Since 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.
Algorithms
Arrival time
Chile
Chile earthquake 1985
Data bases
Data processing
Earthquakes
Elastic waves
Ground motion
Information management
Information systems
Magnitude
Markov chain analysis
Monitoring
Monte Carlo analysis
Plate convergence
Plate tectonics
Regional
Risk management
Seismic networks
Seismic risk
Seismicity
South America
Spatial distribution
Statistical analysis
Strong motion
Subduction
Subduction zones
Temporal distribution