What's the most powerful earthquake you know?

September 19, 2017, the anniversary of the earthquake in Mexico. On the day 32 years ago, the powerful earthquake directly killed more than 7000 people in Mexico and injured 11 thousand. There is no doubt that it was the most miserable day in Mexico. 32 years later, in Mexico, the national earthquake exercises were held on the afternoon of the hour. Unexpectedly, just hours after the exercise, Mexico was hit by a 7.1 earthquake. At present, the number of victims has increased to more than 200 people. Rescue operations are still ongoing.

The video about rescue operation: http://edition.cnn.com/2017/09/20/americas/mexico-city-girl-trapped-school/index.html