The Seward Peninsula is within the ruby tiger moth range, but sightings are rare.
Observation by Kendra Lee:
It has the body of a bee or hornet with big wings.
Derek Sikes, Entomologist with the University of Alaska Fairbanks (UAF) Museum of the North, writes:
That's a tiger moth, family Erebidae. It seems like a worn specimen of Phragmatobia fuliginosa - aka the ruby tiger.
Here's a map of its known records. Well within its expected range.
Comments from LEO Editors:
According to Pacific Northwest Moths species profile, the ruby tiger moth can be found in moist areas with open forest and grasslands. They are common in the eastern US, but in the Pacific Northwest, they have been documented in Oregon, Washington, and Alaska. As larvae, they feed on a wide variety of leafy vegetation and can be found as adult moths from May to August depending on the location.
Observations From Members 
Phragmatobia fuliginosa