Ground-Motion Prediction Model From Intermediate-Depth Intraslab Earthquakes at the Hill and Lake-Bed Zones of Mexico City

Jaimes, Miguel Á.; Ramírez‐Gaytán, Alejandro; Reinoso, Eduardo

doi:10.1080/13632469.2015.1025926

Cited by 31 publications

(20 citation statements)

References 18 publications

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“…6 and 7). For example, station SCT in our study shows a residual of ∼1:5 (ln units) for PGA, and in a Mexico-City-specific GMPE (Jaimes et al, 2015), shows a residual of ∼1 for the same period. However, we also see large residuals for the sites within the broader basin but outside of the lake at periods of SA ∼0:5 s and greater, though Figures 7 and 8 show only SA 2.0 and 0.5 s, respectively.…”

Section: Basin Effectsmentioning

confidence: 42%

“…Large positive residuals in these regions indicate that because the ground-motion models lack appropriate basin effect terms, they do not predict ground-motion intensity well in these regions. Although basin-specific GMPEs exist for Mexico City, some specifically for intermediatedepth intraslab events (Jaimes et al, 2015(Jaimes et al, , 2016, these models are very localized and will not account for basins on a larger regional scale. The results here suggest that although Mexico City is an archetype of basin effects and is the subject of many studies thereof, basin effects are more ubiquitous and may require a more physics-based approach to account for hazard on a larger scale.…”

Section: Basin Effectsmentioning

confidence: 99%

See 1 more Smart Citation

Ground Motions from the 7 and 19 September 2017 Tehuantepec and Puebla‐Morelos, Mexico, Earthquakes

Sahakian

Melgar

Quintanar

et al. 2018

Bulletin of the Seismological Society of America

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The 2017 M 8.2 Tehuantepec and M 7.1 Puebla-Morelos earthquakes were deep inslab normal-faulting events that caused significant damage to several central-to-southern regions of Mexico. Inslab earthquakes are an important component of seismicity and seismic hazard in Mexico. Ground-motion prediction equations (GMPEs) are an integral part of seismic hazard assessment as well as risk and rapid-response products. This work examines the observed ground motions from these two events in comparison to the predicted median ground motions from four GMPEs. The residuals between the observed and modeled ground motions allow us to study regional differences in shaking, the effects of each earthquake, and basin effects in Mexico City, Puebla, and Oaxaca. We find that the ground motions from these two earthquakes are generally well modeled by the GMPEs. However, the Tehuantepec event shows larger than expected ground motions at greater distances and longer periods, which suggests a waveguide effect from the subduction zone geometry. Finally, Mexico City and the cities of Puebla and Oaxaca exhibit very large ground motions, indicative of well-known site and basin effects that are much stronger than the basin terms included in some of the GMPEs. Simple and rapid ground-motion parameter estimates that include site effects are key for hazard and real-time risk assessments in regions such as Mexico, where the vast majority of the population lives in areas where the aforementioned effects are relevant. However, GMPEs based on site correction terms dependent on topographic slope proxies underestimate, at least in the three cities tackled in this work, the observed amplification. Therefore, there is a need to improve models of seismic amplification in basins that could be included in GMPEs.Electronic Supplement: Tables of ground-motion intensity measures for each station and earthquake, as well as the residual uncertainties for each model, over all distances, and figures showing comprehensive ground-motion prediction equation (GMPE) and residuals results, for every period considered in this study, and the uncertainties.

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Section: Basin Effectsmentioning

confidence: 42%

Section: Basin Effectsmentioning

confidence: 99%

Ground Motions from the 7 and 19 September 2017 Tehuantepec and Puebla‐Morelos, Mexico, Earthquakes

Sahakian

Melgar

Quintanar

et al. 2018

Bulletin of the Seismological Society of America

View full text Add to dashboard Cite

show abstract

“…S2). A site-specific GMPE has also been derived for station CU for intraslab earthquakes (Jaimes et al, 2015). For the 2017 earthquake, the observed PGV of 8:4 cm=s is much greater than 2:1 cm=s predicted from such site-specific GMPE (Ⓔ Table S3).…”

Section: Ground Motion In Mexico Citymentioning

confidence: 98%

“…The awareness of the seismic hazard that intraslab earthquakes pose to Mexican altiplano, especially to Mexico City, has motivated detailed studies of many individual events (Singh and Wyss, 1976, 1996Hernandez et al, 2001;Iglesias et al, 2002;Santoyo et al, 2005; National Autonomous University of Mexico [UNAM] Seismology Group, 2010; Díaz-Mojica et al, 2014), the estimation of ground motion in the city from postulated intraslab earthquakes (Pacheco and Singh, 1995;Singh et al, 1996;Iglesias et al, 2002), the development of ground-motion prediction equations (GMPEs; García et al, 2005;Jaimes et al, 2015), and studies related with source characteristics of such earthquakes as compared with their interplate counterparts (García et al, 2004;Singh et al, 2014Singh et al, , 2015. Many of these studies benefitted from the recordings at a strong-motion station at CU located on basalt lava flows on the main campus of UNAM in Mexico City (Figs.…”

Section: Previous Studies and Critical Role Of Recordings From Statiomentioning

confidence: 99%

“…Earthquakes are modeled as extended sources, using standard area-magnitude relations, with focal mechanisms consistent with those observed. It is worth noting that hazard was computed at station CU using a site-specific GMPE (Jaimes et al, 2015), which was constructed using exclusively recordings at this station obtained during intraslab events. Therefore, there are no other appropriate candidate GMPEs.…”

Section: Exceedance Rate Of Pga At Station Cu From Intraslab Earthquakesmentioning

confidence: 99%

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Deadly Intraslab Mexico Earthquake of 19 September 2017 (Mw 7.1): Ground Motion and Damage Pattern in Mexico City

Singh

Reinoso

Arroyo

et al. 2018

Seismological Research Letters

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In the wake of death and destruction left by the 2017 earthquake in Mexico City, it is natural to ask whether the event was unexpected and anomalous. Although such an intraslab earthquake (M w 7.1; depth 57 km; epicentral distance = 114 km from the city) was considered likely, the recordings in the city during the last 54 yrs reveal that the ground motion during the 2017 earthquake was anomalously large in the critical frequency range to the city (0.4-1 Hz). The intraslab earthquakes occur closer to Mexico City, at greater depth, and involve higher stress drop than their interplate counterparts. Consequently, the ground motion is relatively enriched at high frequencies as compared with that during interplate earthquakes, which is dominated by lower frequency waves (f < 0:5 Hz). This explains the observed difference in the damage pattern during the 2017 and the disastrous interplate earthquake of 1985 (M w 8.0). Electronic Supplement: Figures showing spectral ratios, peak ground acceleration (PGA) and peak ground velocity (PGV) as function of distance R, comparison of observed response spectra SA, and predicted median and 1 s SA from a site-specific ground-motion prediction equation (GMPE) model at CU, plot of accelerograms, Fourier acceleration spectra, and SA at SCT of interplate 1985 M w 8.0 and intraslab 2017 M w 7.1 earthquakes, accelerographic stations in Mexico City, which recorded the 2017 M w 7.1 earthquake, SA of the 2017 earthquake at sites in and near Condesa and Roma colonies, and basis for the estimation of exceedance rate of PGA at CU in Mexico City from intraslab earthquakes, and tables providing a list of 20 (interplate and intraslab) earthquakes with largest recorded PGA at CU in the 1964-2017 period, significant pre-1975 intraslab earthquakes, and a comparison of observed PGA and PGV at CU during the 2017 M w 7.1 earthquake with predictions from GMPE.

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Influence of spectral acceleration correlation models on conditional mean spectra and probabilistic seismic hazard analysis

Rodríguez-Castellanos

Ruiz

Bojórquez

et al. 2020

Earthq Engng Struct Dyn

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Innovative engineering applications are proposed to satisfy the current necessities of earthquake engineering, which are well established from a conceptual perspective, and frequently, the development of some missing inputs is only required to employ them, such as the case of the correlations between spectral values at different vibration periods. Accordingly, we computed the correlation between spectral accelerations at two vibration periods using ground motions from interplate and, alternatively, intraslab events, recorded in firm ground of Mexico City. Results show that the spreading of correlation values depends on the rupture mechanism. Then, based on hypothesis test analyses, we used four correlation models available in the literature to predict our correlation values. According to the findings, we proposed a predictive correlation mathematical model for interplate and, separately, for intraslab seismic events. We evaluated the influence of the predictive correlation models on the results corresponding to two earthquake engineering applications. The first refers to compute conditional mean spectra and the second to perform probabilistic seismic hazard analysis (PSHA) using I Np and, alternatively, Sa avg , intensity measures. We found that while the conditional mean spectra might be affected in the region of short vibration periods, the computations of the PSHA with improved intensity measures are not affected significantly.

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Ground-Motion Prediction Model From Intermediate-Depth Intraslab Earthquakes at the Hill and Lake-Bed Zones of Mexico City

Cited by 31 publications

References 18 publications

Ground Motions from the 7 and 19 September 2017 Tehuantepec and Puebla‐Morelos, Mexico, Earthquakes

Ground Motions from the 7 and 19 September 2017 Tehuantepec and Puebla‐Morelos, Mexico, Earthquakes

Deadly Intraslab Mexico Earthquake of 19 September 2017 (Mw 7.1): Ground Motion and Damage Pattern in Mexico City

Influence of spectral acceleration correlation models on conditional mean spectra and probabilistic seismic hazard analysis

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