1. On April 28, 2002, a powerful earthquake measuring 6.6 on the Richter scale struck the Denali National Park and Preserve in Alaska. The quake was felt over a vast area and caused several landslides and rockfalls along the Park Road.

2. In 1911, the first government radio system in Alaska was established on April 28. It was built by the Signal Corps of the United States Army near Fort Egbert in Alaska's interior region. The radio system provided long-distance communication between military outposts and civilian settlements.

3. April 28, 1986, witnessed the closure of one of the most iconic bars in Alaska's history – the Alaskan Hotel and Bar in Juneau. The hotel and bar had been a popular destination for locals and tourists for over 70 years. It closed its doors due to financial problems.

4. On April 28, 1977, a charter plane carrying the University of Alaska Fairbanks basketball team and coaching staff crashed into a mountain near Anchorage. All 10 members of the team, as well as the pilot and one other passenger, were killed in the accident.

5. In 2018 on April 28, the Arctic Innovation Competition was held in Fairbanks. It is an annual innovation competition aimed at fostering entrepreneurship and innovation in Alaska. The competition provides a platform for innovators and entrepreneurs to showcase their ideas and connect with potential investors and customers.