A massive 7.5 earthquake has struck southern and central Mexico, the U.S. Geological Survey is reporting.

Buildings were shaking in Mexico City, causing people to flee buildings and office towers, and setting off quake alert systems. The USGS places the epicenter 2 kilometers southeast of Pinotepa in Oaxaca state. It had a depth of 43 kilometers. 

Crowds of people gathered on central Reforma Avenue in Mexico City as the ground shook.

A magnitude 7.1 earthquake in central Mexico on Sept. 19 left 228 people dead in the capital and 369 across the region.

We pray for the safety of those impacted.

BREAKING: Preliminary 7.5-magnitude earthquake strikes southern Mexico, per USGS. pic.twitter.com/HZd3I4vCm6

— ABC News (@ABC) February 16, 2018