<P> The 1985 Mexico City earthquake struck in the early morning of 19 September at 07 : 17 : 50 ( CST ) with a moment magnitude of 8.0 and a Mercalli intensity of IX ( Violent ) . The event caused serious damage to the Greater Mexico City area and the deaths of at least 5,000 people . The sequence of events included a foreshock of magnitude 5.2 that occurred the prior May , the main shock on 19 September , and two large aftershocks . The first of these occurred on 20 September with a magnitude of 7.5 and the second occurred seven months later on 30 April 1986 with a magnitude of 7.0 . They were located off the coast along the Middle America Trench , more than 350 kilometres ( 220 mi ) away , but the city suffered major damage due to its large magnitude and the ancient lake bed that Mexico City sits on . The event caused between three and four billion USD in damage as 412 buildings collapsed and another 3,124 were seriously damaged in the city . </P>
<P> The 1985 Mexico City earthquake struck in the early morning of 19 September at 07 : 17 : 50 ( CST ) with a moment magnitude of 8.0 and a Mercalli intensity of IX ( Violent ) . The event caused serious damage to the Greater Mexico City area and the deaths of at least 5,000 people . The sequence of events included a foreshock of magnitude 5.2 that occurred the prior May , the main shock on 19 September , and two large aftershocks . The first of these occurred on 20 September with a magnitude of 7.5 and the second occurred seven months later on 30 April 1986 with a magnitude of 7.0 . They were located off the coast along the Middle America Trench , more than 350 kilometres ( 220 mi ) away , but the city suffered major damage due to its large magnitude and the ancient lake bed that Mexico City sits on . The event caused between three and four billion USD in damage as 412 buildings collapsed and another 3,124 were seriously damaged in the city . </P>
what was the magnitude of the earthquake happened in 1985 in mexico city
what was the magnitude of the earthquake happened in 1985 in mexico city
8.0
8.0