Like the later 1755 tsunami that destroyed Lisbon and the Portuguese navigation and map secrets which were stored under guard in the Library.
Canary Islands origin.
1755 The Great Lisbon Earthquake and Tsunami, Portugal
https://www.sms-tsunami-warning.com/pages/tsunami-portugal-1755
The 1755 Lisbon Earthquake-Tsunami and the West Cork Coast
http://www.deepmapscork.ie/past-to-present/climate/1755-lisbon-earthquake-tsunami-west-cork-coast/
sidebars:
The Battle of Alcacer Quibir (also known as “Battle of Three Kings” ... or “Battle of Wadi al-Makhazin” ... in Morocco was fought in northern Morocco, near the town of Ksar-el-Kebir ... and Larache, on 4 August 1578.
https://en.wikipedia.org/wiki/Battle_of_Alc%C3%A1cer_Quibir
https://freerepublic.com/tag/muttonisland/index?tab=articles