There are 169 active volcanoes in the United States, 18 of those volcanoes are considered as “Very High Threats” and are monitored constantly by the United States Geological Survey for eruptive activity.
Volcanoes audit is very important because in case of potential eruption, people that live in the volcano’s near area need to evacuate and also airlines need to change their traveling route to avoid the volcanic ash.
Here is a list of the seven most dangerous volcanoes in the United States that can cause significant damage in case of massive eruption:
1. Kilauea Volcano, Hawaii
A currently erupting Hawaii’s Kilauea volcano has been active since January 3, 1983. The lava continuously flows into the ocean from one of its vents and because of the sulfur dioxide emissions the volcano is listed as a high level alert.
2. Pagan Volcano, Northern Mariana Islands
The last massive eruption of one of the most dangerous volcanoes on the United States territories appeared in 1981. The eruption buried a village with school and a church and the citizens from the whole island were evacuated. Because of the gas emissions the island is still unpopulated and the volcano’s activity is monitored using satellite imaging.
3. Anatahan Volcano, Northern Mariana Islands
As a result of the seismic activities in 1990 the island’s citizens were evacuated before the first eruption in 2003. The island became famous because of the group of Japanese soldiers, who was hiding on the island for 6 years from 1945 to 1951, unaware that the World War II had ended.
4. Yellowstone Supervolcano, Yellowstone National Park, Wyoming
The multiple calderas are formed during the three super eruptions that happened 2.1 million years ago (Huckleberry Ridge eruption), 1.3 million years ago (Mesa Falls eruption) and 630,000 years ago (Lava Creek eruption). In 2010 there were 117 minor earthquakes and in the past few years the caldera floor was moving upward constantly each year as a result of the volcano activity.
5. Long Valley Volcanic Center, Sierra Nevada, California
Since 2010, few earthquakes have occurred in the Long Valley Caldera caused by the volcano activity. The Long Valley is popular by its hydrothermal system and hot springs.
6. Cascade Range, Northwest United States and Canada
The Cascade Range has few active and non-active volcanoes, including the most destructive volcano in the United States History, the Mount St. Helens in Washington. The eruption on May 18, 1980, killed 57 people and created 520 million tons of ash that circled the Earth for 15 days.
7. Redoubt Volcano, Chigmit Mountains, Alaska
The last eruption of the Redoubt Volcano was in 2009 which disrupted the air traffic and produced danger for the population of the city of Anchorage.