Abstract
Prediction of ground motion in Mexico City from postulated earthquakes in the central trans‐Mexican volcanic belt (CTMVB) is clearly important in the estimation of seismic risk. Unfortunately, moderate seismicity and sparse seismic network in the region makes the task difficult. Few useful recordings of CTMVB earthquakes are available in the near‐source region and in the Valley of Mexico. Deterministic modeling of wavefield, reliable at frequencies of interest, remains a challenge due to the complex and mostly unknown crustal structure of the CTMVB and the Valley of Mexico in which the city is located. Even reliable determination of the magnitude of small and moderate earthquakes in the CTMVB from regional recordings is problematic due to the large site effect. Singh et al. (2011) provide an estimation of ground motion in the city from a postulated M w 7 earthquake in the Actopan region, about 120 km to the north of the city. For reasons mentioned by Singh et al. (2011), this estimation may also be valid for the M ∼7 Acambay earthquake of 1912. The estimation is based on the empirical Green’s function (EGF) technique and uses seismograms of two small earthquakes that occurred in the Actopan area. These two events were recorded at a …
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