Site Response Evaluation in the Trans-Mexican Volcanic Belt Based on HVSR from Ambient Noise and Regional Seismicity
Por:
Perez-Moreno, L. Francisco, Rodriguez-Perez, Quetzalcoatl, Zuniga, F. Ramon, Horta-Rangel, Jaime, Perez-Rea, M. de la Luz, Perez-Lara, Miguel A.
Publicada:
1 jul 2021
Resumen:
Featured Application The results obtained in this study allow an initial
overview of the variation of the site response in an area for which low
to moderate seismic risk is usually considered. The information
presented may be used to analyze the seismic effects in the study zone
associated with the geological characteristics. The Trans-Mexican
Volcanic Belt (TMVB), located in central Mexico, is an area for which
low to moderate seismic risk is considered. This is based on the limited
instrumental data available, even though large historical earthquakes
have damaged some urban centers in the past. However, site effects is an
aspect that must be considered in estimating risk, because there are
some instances of important amplifications that have been documented
with serious effects. In this work, ambient noise and earthquake records
from 90 seismic permanent and temporary stations are used to analyze
site response in the TMVB. The results obtained show a heterogeneous
range in the value of the fundamental frequency. When possible, a
comparison was made of the results obtained from ambient noise and
earthquake records. In almost all these comparisons, no significant
differences were observed in terms of the fundamental frequency.
However, there were some stations with a flat average HVSR ambient noise
curve that contradicted earthquake data results, which showed peaks at
some frequencies. Our results are a first step towards categorizing the
different site responses in the TMVB but in order to provide finer
details, it is necessary to improve the actual monitoring conditions.
Filiaciones:
Perez-Moreno, L. Francisco:
Univ Autonoma Queretaro, Fac Ingn, Queretaro 76010, Mexico
Rodriguez-Perez, Quetzalcoatl:
Consejo Nacl Ciencia & Technol, Direcc Adjunta Desarrollo Cient, Mexico City 03940, DF, Mexico
Zuniga, F. Ramon:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Queretaro 76230, Mexico
Horta-Rangel, Jaime:
Univ Autonoma Queretaro, Fac Ingn, Queretaro 76010, Mexico
Perez-Rea, M. de la Luz:
Univ Autonoma Queretaro, Fac Ingn, Queretaro 76010, Mexico
Perez-Lara, Miguel A.:
Univ Autonoma Queretaro, Fac Ingn, Queretaro 76010, Mexico
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