Live USGS data for the question every chilango asks at least once a month.
CDMX has had major quakes on Sep 19 in 1985 AND 2017 — the city runs its annual drill that day. Download the SkyAlert or 911 CDMX app for the official seismic alert; this page is for checking what you just felt.
The free morning brief is launching soon — be first on the list.