Can a mountain lose height?
Can a mountain lose height?
Mount St. Helens lost about 1,300 feet of height in the 1980 eruption.
Before the eruption its summit was 9,677 ft; the upper part of the volcano was removed.
Historically documented
How certain is this?
Pre-eruption summit elevation was 9,677 ft; the upper part of the volcano was removed.
Sources
- Mount St. Helens — USGS
Keep going
- When a mountain becomes a volume problemMount St. Helens' 1980 debris avalanche was about one million Olympic-pool reference volumes.
- Stack it upAbout 1,045.
- Stack it upAbout 110,000 quarters stacked flat would reach the top of the Gateway Arch.
- How many highThe Gateway Arch is about 1,309 iPhone 13s tall.
- Product scaleOne meter is about 6.8 iPhone 13s.
- Ball mathA regulation table-tennis ball is 40 mm in diameter and weighs 2.7 grams.
