1. On September 23, 1969, the Trans-Alaska Pipeline System was approved by the U.S. government, allowing for the construction of a pipeline spanning over 800 miles from Prudhoe Bay to Valdez. This project would become one of the largest engineering feats in history and would significantly impact the Alaskan economy.

2. In 2002, the small community of Wrangell, Alaska was struck by a 7.9 magnitude earthquake on September 23rd. The earthquake caused significant damage to local infrastructure and a nearby mountain face broke apart, causing a landslide that obstructed the Stikine River.

3. September 23, 1867 marked the official transfer of ownership of Alaska from Russia to the United States. The sale, known as the Alaska Purchase, was controversial at the time but has since been seen as a significant event in American history.

4. The first ever Iditarod Trail Sled Dog Race began on September 23, 1973 in Anchorage, Alaska. The race, which covers over 1,000 miles and lasts several days, has become a beloved tradition in Alaskan culture.

5. On September 23, 2008, Alaskan Senator Ted Stevens was indicted on seven counts of corruption, including lying on Senate forms about his financial assets. The trial and eventual conviction of the long-serving senator was a significant moment in Alaskan political history.