200 km long segment of the subduction interface, which has not had a large earthquake since the 1911 event.

[6] The earthquake originally had an estimated magnitude of 7.9 Ms.[4] This was recalculated by the International Seismological Centre in their ISC-GEM catalogue as 7.6 Mw .

[3] The duration of strong shaking was recorded as 90 seconds in Mexico City.

[1] The earthquake is thought to have ruptured the plate interface at the southeastern end of the Guerrero seismic gap.

[6] The greatest damage was observed in Mexico City, where many buildings were destroyed.