Answer:
The United States ranks third, behind Indonesia and Japan, in
the number of historically active volcanoes (that is, those for
which we have written accounts of eruptions). In addition, about
10 percent of the more than 1,500 volcanoes that have erupted in
the past 10,000 years are located in the United States. Most of
these volcanoes are found in the Aleutian Islands, the Alaska
Peninsula, the Hawaiian Islands, and the Cascade Range of the
Pacific Northwest.
