Volcanic Activity in the United States

How many explosive volcanic eruptions have occurred worldwide since the year 2000?

• 60

• 50

• 70

• 47

Which U.S. state has the highest concentration of active volcanoes?

• California

• Hawaii

• Alaska

• Washington

What is the most active volcano on Earth located in Hawaii?

• Mount Rainier

• Kilauea

• Mauna Loa

• Mount St. Helens

Which volcanic eruption in 1980 is considered the most destructive in U.S. history?

• Mount St. Helens

• Kilauea

• Mount Lassen

• Novarupta

What natural disaster can occur due to volcanic activity, even without an eruption?

• Earthquake

• Hurricane

• Lahar

• Tsunami

Which volcano poses the greatest threat to Seattle and Tacoma due to its potential for lahars?

• Mount Hood

• Mount St. Helens

• Mount Rainier

• Mount Shasta

Which mountain range in the U.S. is considered one of the most dangerous volcanic regions?

• Appalachian Mountains

• Cascade Range

• Rocky Mountains

• Sierra Nevada

What is the primary concern with Mount Hood's volcanic activity?

• Lava flows

• Earthquakes

• Lahars

• Ash clouds

Why are the Rocky Mountains largely devoid of active volcanoes?

• They are far from tectonic plate boundaries

• They are too high

• They are too cold

• They are too old

What geological feature is responsible for volcanic activity in Yellowstone?

• Subduction zone

• Hotspot

• Rift valley

• Transform fault