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   On November 1st, 1755, the city of Lisbon in Portugal was ravaged when a Earthquake approximately M 9 struck off the coast, demolishing structures and leading to mass fires. But since the quake occurred off the coast, a Tsunami was generated and would strike Lisbon, killing enough to make the disaster itself claim an estimated 20,000 (HUMAN) lives. On November 1st, 1755, the city of Lisbon in Portugal was ravaged when a Earthquake approximately M 9 struck off the coast, demolishing structures and leading to mass fires. But since the quake occurred off the coast, a Tsunami was generated and would strike Lisbon, killing enough to make the disaster itself claim an estimated 20,000 (HUMAN) lives.