What are 3 interesting facts about Mt St Helens?
40 years ago today, Mount St. Helens erupted
- Over 230 square miles of forest was destroyed in minutes.
- The volcano has had numerous eruptions.
- The blast killed USGS scientist David Johnston.
- Native Americans abandoned hunting grounds at the volcano 3,600 years ago.
What was unique about Mt St Helens eruption?
Most destructive U.S. volcano The 1980 Mount St. Helens eruption was the most destructive in U.S. history. Fifty-seven people died, and thousands of animals were killed, according to USGS. More than 200 homes were destroyed, and more than 185 miles of roads and 15 miles of railways were damaged.
How old is Mount Saint Helens?
Helens began about 40,000 years ago with dacitic volcanism, which continued intermittently until about 2,500 years ago.
How did Mount St. Helens explode for kids?
Some of the Native Americans who lived around Mount Saint Helens called it Louwala-Clough, or “smoking mountain.” It had been dormant, or inactive, since 1857. However, a steam eruption began on March 27, 1980. On the morning of May 18, an earthquake caused a landslide on the north side of the mountain.
How loud was Mount Saint Helens?
163 decibels
On 18th May 1980, Mount St Helens erupted in Skamania County, Washington. The force was enough to blow down trees 16 miles away and it was seen on the Space Shuttle from outer space. The sound measured 163 decibels and the force blew windows out up to 200 miles away in Seattle!
How long did the Mt St Helens eruption last?
9-hour
A wave of decreasing pressure down the volcanic conduit to the subsurface magma reservoir, which then began to rise, form bubbles (degas), and erupt explosively, driving a 9-hour long Plinian eruption. Steam-blast eruption from summit crater of Mount St. Helens.
Does Mt St Helens smoke?
Every few minutes, Mt. St. Helens sends up a plume of noxious smoke, a reminder that this is no dormant volcano. It can come out of the main crater or one of the side craters, including a small spire that appears to be the new (as of 1980) peak.
Where is Mount Etna?
island of Sicily, Italy
Mount Etna, active volcano on the island of Sicily, Italy.
Does Mt St Helens have snow?
The winter season offers a perfect opportunity to experience Mount St. Helens. Although the winter route is longer than the summer route, the mountain’s dusty, rocky flanks are covered with snow. And since the climb is longer and more challenging, there are typically fewer people on the mountain.
What are some interesting facts about kissing?
A passionate kiss can burn up to 20 calories per minute. 2. Today, an average kiss lasts more than 12 seconds. In the 1980s, couples came up for air sooner than that: back then an average kiss lasted a mere 5.5 seconds. 3. Public kissing isn’t always allowed everywhere.
What are some interesting facts about stratovolcanoes?
Stratovolcanoes are the most common type of volcano. 6. Of Earth’s 1,511 volcanoes known to have erupted in the past 10,000 years, 699 are stratovolcanoes. 7. Some of the most beautiful mountains in the world are stratovolcanoes, including Mount Rainer in Washington, Mount Fuji in Japan, and Kamchatka in Russia.
What is the summit of a stratovolcano like?
The summit of a stratovolcano tends to be small when compared to the summit of shield volcanoes. Stratovolcanoes are the most dangerous volcanoes to humans and animals because they are very explosive, producing toxic gas and flying volcanic fragments.
Why are stratovolcanoes dangerous to humans?
Stratovolcanoes are the most dangerous volcanoes to humans and animals because they are very explosive, producing toxic gas and flying volcanic fragments. Explosive volcanic eruptions, which are common to stratovolcanoes, pose serious threats to aviation travel.