Over 640 are killed after a magnitude 6.4 earthquake strikes the Mexican states Puebla and Veracruz.

A moment magnitude 6.3–6.4 earthquake affected southeastern Mexico, in the states of Puebla and Veracruz, on 3 January 1920 at 22:25 local time. A maximum Mercalli-Cancani intensity of XI–XII (Extreme) was recorded in the epicenter, between Chilchotla and Patlanalá. While estimates of the death…