The Veracruz earthquake of 1973, also known as El Terremoto de Orizaba, occurred at 3:50 a.m. local time (9:50 GMT) on August 28, with the epicenter located in the vicinity of Serdan in the State of Puebla. It registered 7.0 on the Richter magnitude scale and had a maximum perceived intensity of VII (Very Strong) on the Mercalli intensity scale.