The Mw 7.4 Tecomán earthquake occurred off the Pacific coast of the state of Colima, México on 22 January 2003 (Figure 1). It was felt very strongly in the city of Colima and the towns of Tecomán and Armería. The earthquake left 21 persons dead. About 15,000 houses suffered damage; roughly 3,000 of these experienced severe damage. The most significant damage was observed in adobe and unreinforced brick masonry houses. Very few cases of structural failure were recorded in engineered buildings. Ground motion in the lakebed zone of Mexico City, about 540 km from the epicentral zone,...

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