About half. It is considered an active super-volcano.
No I don't think so anymore. They allow visitors all the time.
No. Most of Yellowstone lies outside of the Yellowstone Caldera, though this caldera still takes up a large portion of the park. A larger portion of the park is in the older Island Park Caldera, which partly overlaps the Yellowstone Caldera. This still takes up a minority of the park.
The caldera that covers most of Yellowstone Park was produced by a supervolcano. A supervolcano is an explosive volcano capable of producing an eruption with an ejecta volume greater than 1,000 cubic kilometers. The Yellowstone Caldera is one of the largest and most active supervolcanoes in the world.
No. For one thing, the Yellowstone volcano is not a mountain, it is a caldera. It is usually referred to as the Yellowstone caldera or the Yellowstone supervolcano.
The Yellowstone caldera.
The Yellowstone caldera is associated with a hot spot, not a plate boundary.
An eruption of the Yellowstone caldera occurs it will likely be an extinction level event.
A few miles under Yellowstone is an enormous magma chamber associated with a supervolcano.
The Yellowstone Caldera, also known as the Yellowstone Supervolcano, is a volcanic caldera and supervolcano estimated to be an area of about 34 X 45 miles (55 X 72 km).
Yellowstone Caldera, Wyoming, USA
There is the Yellowstine Caldera in Yellowstone, Wyoming.