1. In 1906, a major earthquake struck San Francisco on April 18, but the initial tremors began on April 16. The earthquake, estimated to be a 7.8 magnitude, caused immense damage and loss of life in the city and surrounding areas.

2. On April 16, 1947, a massive explosion occurred at the Port of Texas City, a major shipping hub in the Gulf of Mexico. The blast, which was caused by a fire aboard a cargo ship, killed hundreds of people and caused extensive damage.

3. In 1963, on April 16, Bob Dylan released his second studio album, "The Freewheelin' Bob Dylan." The album contained several of his most famous songs, including "Blowin' in the Wind" and "A Hard Rain's A-Gonna Fall."

4. On April 16, 1972, the Los Angeles Lakers won their first NBA championship since moving to California from Minneapolis. Led by Wilt Chamberlain, Jerry West, and Gail Goodrich, the Lakers defeated the New York Knicks in five games.

5. In 1995, a domestic terrorist attack occurred in Oklahoma City on April 19, but the planning and preparation began on April 16. The attack, carried out by Timothy McVeigh and Terry Nichols, killed 168 people and injured hundreds more. It remains one of the deadliest acts of domestic terrorism in U.S. history.