1986 FIFA World Cup Group B 1986 FIFA World Cup Group B Group B of the 1986 FIFA World Cup was one of the groups of nations competing at the 1986 FIFA World Cup. The group's first round of matches began on 3 June and its last matches were played on 11 June. Matches were played at the Estadio Azteca in Mexico City and at the Estadio Nemesio Díez in Toluca. Host Mexico topped the group, joined in the second round by Belgium and by Paraguay, who were making their first appearance in the finals since 1958. Iraq, making their debut in the World Cup, lost
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