Where is a hotspot in the US?
One of the most famous ones is the Yellowstone Hotspot.
One of the most famous ones is the Yellowstone Hotspot. It is presently located in Yellowstone National Park.
Over millions of years, as the North American plate has moved, the exact location of the hotspot (which has remained in the same position on the planet) becomes increasingly easterly, according to our perspective.
13.8 million years ago, the the south western most point of what is now Idaho was directly over the hotspot. The last eruption occurred 640,000 years ago.
You can read more about Yellowstone's geology here.