The Lisbon earthquake was a disaster that killed not only most of Lisbon but most of Morocco and other coastal regions as well. The wave that hit the city was 30 meters high. This Tsunami was caused by a M9 earthquake. The death toll reached up to about 100,000 people with Portugal's 90,000 and Morocco's 10,000 deaths. Areas several kilometers in other directions had the same issues with waves destroying boats along the coast line.