The Mw 8.4 23 June 2001 Southern Peru earthquake generated intense ground motions in a large region encompassing southern Peru and northern Chile. The earthquake was recorded by seven strong motion stations with peak ground accelerations ranging from 0.04 g to 0.34 g for site-to-fault distances ranging from about 70 km to 220 km. At this time, there are no other strong motion records for an earthquake of this magnitude. Hence, the strong motion data set from this earthquake is unique and of particular interest to engineers dealing with seismic design in subduction regions. This paper presents an engineering analysis of the strong motion records. Shear-wave velocity profiles were measured using Spectral Analysis of Surface Waves methods at four stations. Measured shear-wave velocities are high, indicating that all sites classify as stiff soil sites (Site C) according to the International Building Code classification scheme. The strong motion set is characterized by strong high frequency content at large distances from the fault. Site response contributed at least in part to the observed high frequency content in the ground motions. In general, current attenuation relationships for spectral acceleration underpredicted the observed ground motions.
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Research Article|
May 01, 2010
Engineering Analysis of Ground Motion Records from the 2001 Mw 8.4 Southern Peru Earthquake
Adrian Rodriguez-Marek;
Adrian Rodriguez-Marek
M.EERI
a
Civil and Environmental Engineering Dept., Washington State University, Pullman WA 99164-2910
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James A. Bay;
James A. Bay
b
Civil and Environmental Engineering Dept., Utah State University, Logan, UT 84322
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Kwangsoo Park;
Kwangsoo Park
M.EERI
c
Civil, Architectural and Environmental Engineering Dept., University of Texas, Austin, Texas, 1 University Station C1792, Austin, TX 78712
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Gonzalo A. Montalva;
Gonzalo A. Montalva
M.EERI
d
Civil Engineering Dept., University of Concepcion, Casilla 160-C, Correo 3, Concepción—Chile
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Adel Cortez-Flores;
Adel Cortez-Flores
e
Consultora Union SRL, O'Connor No 458, Tarija—Bolivia, formerly at Washington State University
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Joseph Wartman;
Joseph Wartman
M.EERI
f
Civil, Architectural and Environmental Engineering Dept., Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104
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Rubén Boroschek
Rubén Boroschek
g
Civil Engineering Dept., University of Chile, Blanco Encalada 2002, Santiago—Chile
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Adrian Rodriguez-Marek
M.EERI
a
Civil and Environmental Engineering Dept., Washington State University, Pullman WA 99164-2910
James A. Bay
b
Civil and Environmental Engineering Dept., Utah State University, Logan, UT 84322
Kwangsoo Park
M.EERI
c
Civil, Architectural and Environmental Engineering Dept., University of Texas, Austin, Texas, 1 University Station C1792, Austin, TX 78712
Gonzalo A. Montalva
M.EERI
d
Civil Engineering Dept., University of Concepcion, Casilla 160-C, Correo 3, Concepción—Chile
Adel Cortez-Flores
e
Consultora Union SRL, O'Connor No 458, Tarija—Bolivia, formerly at Washington State University
Joseph Wartman
M.EERI
f
Civil, Architectural and Environmental Engineering Dept., Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104
Rubén Boroschek
g
Civil Engineering Dept., University of Chile, Blanco Encalada 2002, Santiago—Chile
Publisher: Earthquake Engineering Research Institute
Received:
12 Feb 2009
Accepted:
03 Sep 2009
First Online:
01 Jun 2020
Online ISSN: 1944-8201
Print ISSN: 8755-2930
© 2010 Earthquake Engineering Research Institute
Earthquake Engineering Research Institute
Earthquake Spectra (2010) 26 (2): 499–524.
Article history
Received:
12 Feb 2009
Accepted:
03 Sep 2009
First Online:
01 Jun 2020
Citation
Adrian Rodriguez-Marek, James A. Bay, Kwangsoo Park, Gonzalo A. Montalva, Adel Cortez-Flores, Joseph Wartman, Rubén Boroschek; Engineering Analysis of Ground Motion Records from the 2001 Mw 8.4 Southern Peru Earthquake. Earthquake Spectra 2010;; 26 (2): 499–524. doi: https://doi.org/10.1193/1.3381172
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Index Terms/Descriptors
- accelerograms
- aftershocks
- alluvium
- Andes
- attenuation
- body waves
- boulders
- Cenozoic
- Chile
- clastic sediments
- data acquisition
- data processing
- earthquakes
- elastic waves
- engineering properties
- faults
- focus
- Fourier analysis
- geologic hazards
- gravel
- great earthquakes
- ground motion
- guided waves
- instruments
- intensity
- landslides
- liquefaction
- mass movements
- natural hazards
- Nazca Plate
- networks
- Pacific Plate
- Peru
- plate tectonics
- Quaternary
- risk assessment
- S-waves
- sand
- sediments
- seismic waves
- seismographs
- soils
- South America
- South American Plate
- spectra
- spectral analysis
- stiffness
- strong motion
- subduction zones
- surface waves
- terraces
- thrust faults
- tsunamis
- velocity
- wave amplification
- Arias intensity
- Southern Peru earthquake 2001
- megathrust earthquakes
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