The 1920 Xalapa earthquake rocked the gulf coast of Mexico on January 4, causing major damage in the states of Veracruz and Puebla. The epicenter was located somewhere in mountainous region of the eastern Trans-Mexican Volcanic Belt which triggered massive mudflows and landslides which claimed anywhere between 700 to 4,000 lives. The event produced extreme ground motions reaching causing severe ground effects. The epicentral region of this earthquake was allocated the maximum level of shaking at XII (Extreme) on the Modified Mercalli intensity scale. It would remain the deadliest earthquake in Mexico until the 1985 Mexico City earthquake.