[History] On 26 January 1531, a 7.7 earthquake hit Lisbon. It wasn't widely documented until the rediscovery of contemporary records in the early 20th century
People who visited Portugal are probably aware of the 1755 earthquake: https://en.wikipedia.org/wiki/1755_Lisbon_earthquake
List of all earthquakes in Portugal: https://en.wikipedia.org/wiki/List_of_earthquakes_in_Portugal
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