1. Oregon became a state on April 15, 1859 - In 1859, Oregon officially became the 33rd state in the United States.

2. The first major league baseball game in Oregon was played on April 15, 1975 - The Portland Mavericks baseball team played their first game in the Pacific Coast League against the Spokane Indians.

3. The Woodburn tornado struck on April 15, 1972 - A massive tornado ripped through Woodburn, Oregon, killing four people and causing millions of dollars in damage.

4. The Oregon State Capitol was dedicated on April 15, 1938 - The capitol, located in Salem, Oregon, was designed in the Art Deco style and has a distinctive copper-clad dome.

5. The largest earthquake in Oregon history occurred on April 15, 1991 - The earthquake, measuring 5.6 on the Richter scale, was centered near Cape Mendocino, California, but was felt throughout much of Oregon. Fortunately, there were no fatalities reported.