• the 1980 Mount St. Helens eruption in Washington was the first major volcanic eruption to occur in the U.S. since the 1915 eruption of Lassen Peak in California?

Facts on topics related to 1980 Mount St. Helens eruption

Mount St. Helens

• Washington State Route 504 was damaged when Mount St. Helens erupted in 1980 and had to be rebuilt on higher ground?
• although the summit of underwater volcano Loihi is 969 metres (3,180 ft) below sea level, it is still twice as tall, measured from the base of its southern flank, as Mount St. Helens ever was?
• the volcano Mount St. Helens is named after Alleyne FitzHerbert of Derby (pictured)?

1980 eruption of Mount St. Helens

• Washington State Route 504 was damaged when Mount St. Helens erupted in 1980 and had to be rebuilt on higher ground?
• interest in several primaries for the 1980 United States Senate election in Oregon was diminished partly due to the eruption of Mount St. Helens?