What was the magnitude of the Indian Ocean Tsunami 2004?

9.1

The correct answer is Option (3) → 9.1

The Indian Ocean Tsunami of 2004, also known as the Boxing Day Tsunami, had a magnitude of around 9.1 to 9.3 on the Richter scale. It was one of the deadliest tsunamis in recorded history, causing massive destruction and loss of life across several countries bordering the Indian Ocean.