Complex sentence: All teletsunamis have been generated by major earthquakes, such as the 2004 Indian Ocean earthquake, 1964 Alaska earthquake, and 1960 Valdivia earthquake.
Split into simpler sentences: All teletsunamis have been generated by major earthquakes. They include the destructive waves that were generated by the 2004 Indian Ocean earthquake, 1964 Alaska earthquake, and 1960 Valdivia earthquake.