A Consistently Processed Strong-Motion Database for Chilean Earthquakes

Journal
Seismological Research Letters
ISSN
0895-0695
1938-2057
Date Issued
2022
Author(s)
Sebastián Castro
Roberto Benavente
Jorge G. F. Crempien
Juan Carlos de la Llera
Type
Resource Types::text::journal::journal article
Scopus ID
2-s2.0-85139081901
WoS ID
WOS:000934577200001
DOI
URL
URL Institutional Repository
Abstract
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.
Project(s)
Subjects
chile

; 

data handling

; 

earthquakes

; 

markov processes

; 

monte carlo methods

; 

seismic waves

; 

baseline correction

; 

central chile

; 

chile earthquakes

; 

convergent margin

; 

correction method

; 

earthquake records

; 

megathrust earthquakes

; 

motion database

; 

seismic networks

; 

strong-motion

; 

database

; 

earthquake event

; 

earthquake magnitude

; 

monte carlo analysis

; 

plate motion

; 

seismic source

; 

strong motion

; 

database systems