* The earthquake caused the ground to shake violently, which caused the water in the harbor to slosh back and forth. This resulted in large waves that capsized and destroyed many boats.

* The tsunami that followed the earthquake was even more destructive. The waves were as high as 30 meters (100 feet) and they swept over the city of Lisbon, destroying everything in their path. Many boats were swept away by the waves and some were even carried inland.

* The earthquake and tsunami caused widespread damage to the Portuguese fishing fleet. Many fishing boats were destroyed and many fishermen were killed. This had a devastating impact on the Portuguese economy, which was heavily reliant on fishing.

The earthquake and tsunami also had a significant impact on the development of maritime technology.

* The need to rebuild the Portuguese fishing fleet led to the development of new boat designs that were more resistant to earthquakes and tsunamis.

* The earthquake and tsunami also led to the development of new navigation and safety equipment. This included new charts and maps that showed the areas most at risk from earthquakes and tsunamis.

* The lessons learned from the 1755 Lisbon earthquake and tsunami have helped to make the world's oceans safer for navigation.