Ground Motion Zoning of Santiago de Cuba: An Approach by SH Waves Modelling

-- The expected ground motion in Santiago de Cuba basin from earthquakes which occurred in the Oriente fault zone is studied. Synthetic SH-waves seismograms have been calculated along four profiles in the basin by the hybrid approach (modal summation for the path source-profile and finite difference...

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Bibliographic Details
Published in:Pure and applied geophysics 2004-03, Vol.161 (5-6), p.1041-1059
Main Authors: Alvarez, Leonardo, Garcia, Julio, Vaccari, Franco, Panza, Giuliano F, Gonzalez, Bertha, Reyes, Carmen, Fernandez, Barbara, Pico, Ramon, Zapata, Jose A, Arango, Enrique
Format: Article
Language:English
Subjects:
Basins
Cuba
Earthquakes
Geology
Ground motion
Grounds
Mathematical models
Seismic activity
Seismic phenomena
Subsoils
Zoning
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Summary:-- The expected ground motion in Santiago de Cuba basin from earthquakes which occurred in the Oriente fault zone is studied. Synthetic SH-waves seismograms have been calculated along four profiles in the basin by the hybrid approach (modal summation for the path source-profile and finite differences for the profile) for a maximum frequency of 1 Hz. The response spectra ratio (RSR) has been determined in 49 sites, distributed along all considered profiles with a spacing of 900 m. The corresponding RSR versus frequency curves have been classified using a logical-combinatorial algorithm. The results of the classification, in combination with the uppermost geological setting (geotechnical information and geological geometry of the subsoil) are used for the seismic zoning of the city. Three different main zones are identified, and a small sector characterized by major resonance effects, due to the particular structural conditions. Each zone is characterized in terms of its expected ground motion parameters for the most probable strong earthquake (M sub(S)=7), and for the maximum possible (M sub(S)=8).
ISSN:0033-4553
1420-9136
DOI:10.1007/s00024-003-2500-3