Mexico City will reinforce its earthquake alert system by installing between 800 and 1,000 new speakers on the streets, the government announced after the 7.1 earthquake struck on September 19.

Mayor Miguel Angel Mancera told a press conference on Saturday that this expansion will be focused on placing speakers near schools and in vulnerable parts of the city, where people are calling for more support. While the Mayor did not state a cost for the project, he said the new speakers would be installed in the next eight weeks.

"We are carrying out a reinforcement we feel is necessary, above all because people are calling for it," Xinhua quoted Mancera as saying.

Since September 2015, around 8,200 speakers have been placed around the city to issue a loud alarm when an earthquake above magnitude 6 is detected.

Authorities activate the alert to Mexico City residents when sensors along the Pacific Coast receive seismic waves, usually allowing for a minute's warning to the capital.

However, the September 19 earthquake hit far closer to the city, in the state of Morelos, giving no time for such an alert. It brought down 38 buildings and severely damaged around 1,000 more in the capital city.

A total of 369 people died nationwide as it also struck the State of Mexico, Morelos, Puebla, Guerrero and Oaxaca.

It also came on the heels of another earthquake in early September, which hit with a strength of 8.2 magnitude, killing 98 people in the south of the country and damaging over 100,000 buildings.

The Mexican government has explained that this earthquake has generated over 7,000 aftershocks due to the Cocos tectonic plate suffering an important crack.