Mount St. Helens Eruption Quiz

Who was the United States Geological Survey (USGS) volcanologist who had a clear view of Mount St. Helens's north flank from his monitoring station 8 km away?

• Jim Scymanky

• Bruce Nelson

• John Galvin

• David Johnston

What caused the largest landslide in recorded history at Mount St. Helens?

• Earthquake

• Hurricane

• Volcanic eruption

• Tsunami

How did people survive the landslide caused by the volcano?

• They hid behind a tree.

• They hid behind a rock.

• They fell into a hole in the ground.

• They jumped into the water and held their breath.

What caused most of the 57 fatalities during the eruption?

• Tsunami

• Landslide

• Earthquake

• Lava flow

How many trees did the surge from the volcano destroy?

• a couple

• a hundred

• thousands

• over a billion

What was the height reached by the ash and magma spewed skyward from Mount St. Helens?

• 15 km

• 20 km

• 10 km

• 19 km

How much fine ash was dumped on the city of Yakima, Washington?

• 600 tons

• 6,000tons

• 60,000 tons

• 600,000 tons

Which of the following was NOT a warning sign that the volcano was about to erupt?

• A bulge on the north side of the volcano

• A huge thunderstorm

• Earthquakes

• Gases coming out of the vent of the volcano

What technology has advanced dramatically since the eruption for better monitoring of volcanoes?

• Satellite imaging

• Underwater drones

• Sonar

• GPS monitors

Which of the following was a major impact of the volcanic eruption of Mt. St. Helens?

• Congress cut funding for scientists to study volcanoes.

• People decided to not ever live within 50km of Mt. St. Helens.

• Roads became unpassable due to landslide debris and volcanic ash

• The trees started to immediately grow back through the ash.