1. In 1902, a volcanic eruption on Mount Wrangell sent ash and smoke into the air, which was visible from as far away as Valdez. The eruption continued throughout the month, causing significant damage to the glaciers nearby.

2. In 1925, the serum run to Nome began, as teams of sled dogs and mushers embarked on a 674-mile journey to deliver diphtheria antitoxin to the town of Nome. The serum arrived on February 2, and the heroic efforts of the mushers and their dogs were celebrated around the world.

3. In 1939, construction began on the Alaska Highway, a crucial route connecting the United States to Alaska. The highway was built in just over eight months, with labor from both American and Canadian workers.

4. In 1943, the Adak Island earthquake occurred, registering a magnitude of 8.2 on the Richter scale. The earthquake triggered a tsunami that caused significant damage along the coast of Alaska and caused several deaths.

5. In 2019, a magnitude 7.2 earthquake struck near Anchorage, causing widespread damage and power outages. Fortunately, no fatalities were reported, and the city was able to recover quickly from the earthquake's effects.