1986 FIFA World Cup first nation to host two World Cups. This second World Cup in Mexico came 16 years after the first one in 1970. A severe earthquake in September 1985, eight months before the tournament, cast doubt over Mexico's ability to organize the event, but the stadia were not affected and it was decided to go ahead with the preparations. As 1986 had been declared the International Year of Peace by the United Nations, the advertising boards of all the stadia displayed the FIFA and United Nations logos along with the legend "Football for Peace – Peace Year". For the design of
1985 Mexico City earthquake their own frequencies of vibration. Those that are six to fifteen stories tall also vibrate at the 2.5-second cycle, making them act like tuning forks in the event of an earthquake. The low-frequency waves of an earthquake are amplified by the mud of the lakebed, which in turn, is amplified by the building itself. This causes these buildings to shake more violently than the earthquake proper as the earthquake progresses. Many of the older colonial buildings have survived hundreds of years on the lakebed simply because they are not tall enough to be affected by the resonance effect. The earthquake