Yes. In fact, Yellowstone National Park is a supervolcano.
One can find information about a supervolcano at Wikipedia, various websites where geologists and volcano enthusiasts gather and discuss information about supervolcano.
No. Krakatoa as produced some very large eruptions, but it falls short of a supervolcano.
The Yellowstone Supervolcano.
Inevitably, the Yellowstone caldera will explode as a supervolcano. Whether that will happen soon is unlikely.
its a supervolcano
By not being anywhere near it.
No. It is a caldera.
A Supervolcano is a volcano characterized by the large area it affects. A supervolcano is generally accepted to be a volcano that discharges ash, lava, or pumis deposits that spread over 240 or more cubic miles from its center. The Indonesian Toba is an example of a supervolcano.
No. The 1883 eruption of Krakatoa did kill about 36,000 people. Although this eruptions was extremely large, Krakatoa is not a supervolcano.
No. Old Faithful is a geyser. However, it and the other geysers and hot springs of Yellowstone are the result of heat generated by a supervolcano.