What device is used to measure earthquakes?

Which famous volcano in Washington state erupted dramatically in 1980?

What scale is commonly used to measure earthquake intensity?

Which U.S. state has the most active volcanoes?

What is the name of the volcanic region under Yellowstone National Park?

Which famous volcano destroyed the ancient city of Herculaneum along with Pompeii?

What is the 'Ring of Fire'?

Which city experienced a devastating earthquake in 1906?

What type of volcano is shaped like a gentle slope with a wide base?

Which ancient Roman city was NOT destroyed by Mount Vesuvius?

What natural phenomenon often follows large undersea earthquakes?

Which Hawaiian volcano is considered the world's most active?

What is the famous volcanic city that was destroyed by Mount Vesuvius in 79 AD?

Which country is nicknamed the 'Land of Fire and Ice' due to its volcanoes and glaciers?

What is the molten rock called when it's inside a volcano?

Which famous volcano erupted in 1883, creating the loudest sound in recorded history?

What percentage of earthquakes occur in the Ring of Fire?

Which ancient god was believed to cause earthquakes in Japanese mythology?

What is the name of Italy's only active super volcano?

Which famous volcano in the Philippines erupted in 1991, causing global temperature drops?