Title

Intraslab versus interplate earthquakes as recorded in Mexico City: implications for seismic hazard

Author

Shri Krishna Singh

Access level

Embargoed Access

Summary or description

We study the relative importance of interplate and intraslab earthquakes in the seismic hazard of Mexico City by analyzing accelerograms recorded at the hill-zone site of CU (1964-2012) and the lake-bed site of SCT (1985-2012). A(max) exceeded 6 gal during 20 earthquakes at CU during this period. Of these, eight were intraslab events so that the exceedance rate of A(max) >= 6 gal from both types of earthquakes is roughly about the same. The estimated return period of A(max) of 30 gal from the two types of earthquakes is similar to 100 yrs. If we consider high-frequency (2.5-8.5 Hz) acceleration (A(max)(HF)) at CU, then the top 7 out of the 20 events are all intraslab earthquakes. Even at the lake-bed site of SCT, the A(max)(HF) values are, generally, associated with intraslab earthquakes. It follows that the risk from both types of earthquakes to low-rise construction in the city needs careful assessment.

Publisher

EARTHQUAKE ENGINEERING RESEARCH INST

Publish date

October 17, 2013

Publication type

Article

Publication version

Published Version

Format

pdf

Source

https://journals.sagepub.com/doi/full/10.1193/110612EQS324M

Language

English

Relation

EARTHQUAKE SPECTRA

1944-8201

Singh, S. K.; M. Ordaz; X. Perez-Campos and A. Iglesias. 2015. "Intraslab Versus Interplate Earthquakes as Recorded in Mexico City: Implications for Seismic Hazard." Earthquake Spectra, 31(2), 795-812.

Source repository

Repositorio de Literatura del Servicio Sismológico Nacional

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