1. On April 27, 1812, a large earthquake struck southeastern Missouri, estimated at a magnitude of 7.8. This is the largest recorded earthquake in Missouri history, and it caused significant damage to buildings and roads in the region.

2. On April 27, 1865, the steamboat Sultana exploded on the Mississippi River near Memphis, Tennessee, killing over 1,800 people. Many of those on board were former Union soldiers who were returning home after being released from Confederate prison camps.

3. On April 27, 1950, the St. Louis Browns played their first game as the Baltimore Orioles. The team had been purchased and relocated by a group of businessmen led by Clarence Miles, after years of struggling to find success in St. Louis.

4. On April 27, 1984, the Missouri State Capitol in Jefferson City was added to the National Register of Historic Places. The building was completed in 1917 and is known for its impressive dome and Greek Revival architecture.

5. On April 27, 2011, a devastating tornado outbreak swept through Missouri and several other states, leaving a trail of destruction in its wake. The tornadoes killed over 500 people and caused billions of dollars in damage. Missouri was especially hard hit, with Joplin being one of the hardest hit communities.