The Indian Ocean tsunami traveled a distance of 3,000 miles. This massive tsunami was triggered by an undersea earthquake off the coast of Sumatra, Indonesia, in 2004. The waves generated by the earthquake spread across the Indian Ocean, affecting several countries and coastlines. The tsunami devastated coastal communities in Indonesia, Thailand, Sri Lanka, India, and even reached as far as the east coast of Africa. The immense distance traveled by the tsunami highlights the sheer power and destructive force of this natural disaster.