September 19 and 20, 1985 According to USGS, "At least 9,500 people were killed, about 30,000 were injured, more than 100,000 people were left homeless, and severe damage was caused in parts of Mexico City and in several states of central Mexico. According to some sources, the death toll from this earthquake may be as high as 35,000. It is estimated that the quake seriously affected an area of approximately 825,000 square kilometers, caused between 3 and 4 billion U.S. dollars of damage, and was felt by almost 20 million people. ... Damage also occurred in the states of Colima, Guerrero, Mexico, Michoacan, Morelos, parts of Veracruz and in other areas of Jalisco."

Related categories 1

Individual and organizational response to the 1985 earthquake in Mexico City, Mexico.
Report in PDF format prepared in 1990 by the Disaster Research Center of the University of Delaware. Includes observations of behaviors by organizations and individuals as well as conclusions and references.
Reverberations: Mexico City's 1985 Earthquake and the Transformation of the Capital
The video lecture by MIT's Diane Davis discusses the earthquake's implications for social movements, the character of land use and property ownership, and the legitimacy of the capital city's political leaders.
Tsunamis of 19 and 21 September 1985 - Source Mechanism Study
Technical analysis uses seismic and geologic data and empirical relationships to determine energies and source areas of the resulting tidal waves.
USGS Earthquake Hazards Program
Map, summary of destruction, listing of extent of impact, and comments on subsurface geological structure.
CNN - Mexico City learns from the past quakes
Reviews building code changes and evacuation procedures. (August 17, 1999)
Some Afterthoughts
Geoscience Research Institute discussion of "two contrasting modes of geological thought: uniformitarianism, which proposes that geologic changes occur by normal processes, and catastrophism, which proposes changes during unusual catastrophic events". (January 01, 1985)
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