An inslab earthquake occurred below Atoyac, Guerrero, Mexico, on 13 April 2007 (Mw 5.9) at a depth of 37 km. It was strongly felt in Acapulco (Δ ∼65 km) and Mexico City (Δ ∼270 km); the peak ground accelerations (PGAs) at soft sites in these two cities were as high as 200 cm/s2 and 12 cm/s2, respectively. This was the first significant earthquake in Mexico since the recent strengthening of strong-motion and broadband networks in the country. This was also the first moderate event for which ground-motion maps for Mexico City were produced and distributed...

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