1. On April 24, 1915, a devastating earthquake struck near the city of Inglewood, California. The earthquake measured 6.3 on the Richter scale and caused significant damage to buildings and homes throughout the surrounding area.

2. In 1934, on April 24th, a fire broke out in the Los Angeles Public Library which destroyed or damaged over one million books. The cause of the fire remains unknown, but it is believed to have been caused by faulty electrical wiring.

3. On April 24, 1961, the Walnut Creek BART station officially opened to the public. This marked the first BART station to be built in Contra Costa County, providing a fast and efficient transportation option for commuters in the San Francisco Bay Area.

4. In 1980, on April 24th, the United States Olympic Committee announced that the Summer Olympics would be held in Los Angeles in 1984. This would be the second time that Los Angeles would serve as the host city for the Summer Olympics, having previously hosted the games in 1932.

5. On April 24, 2005, the first-ever Armenian Genocide Remembrance Day was observed in California. This day was established to honor the victims of the Armenian Genocide that occurred between 1915-1923, which resulted in the deaths of an estimated 1.5 million Armenians.