1746 Lima–Callao earthquake 1746 Lima–Callao earthquake The 1746 Lima–Callao earthquake occurred at on 28 October with a moment magnitude of 8.6–8.8 and a maximum Mercalli intensity of XI ("Extreme"). The epicenter was located about north-northwest of the capital Lima, which was almost completely destroyed, and the subsequent tsunami devastated the port city of Callao. It was the deadliest earthquake in Peru’s history prior to the 1970 earthquake. Peru lies above the convergent boundary where the Nazca Plate is subducting beneath the South American Plate at a rate of 61 mm per year. It has been the location for many large and damaging earthquakes
Lima Province territories of present-day Lima, Callao and Ica regions, and the provinces of Casma, Huarmey and Santa, which later would be part of the La Costa Department. The department was further subdivided as time passed but the Lima Province kept being part of it. Due to the massive migration from other areas of the country, the need to separate the province from the rest of the department was forecast by experts. In 2002, the new regionalization law passed by President Alejandro Toledo made the Lima Province a separate entity from the rest of the newly created Lima Region. The province is