about 540 million tons.
How much ash was there from the May 18, 1980 eruption of Mount St. Helens? During the 9 hours of vigorous eruptive activity on May 18, 1980, about 540 million tons of ash from Mount St. Helens fell over an area of more than 22,000 square miles (57,000 square kilometers).
How deep was the ash from Mt St Helens?
2 inches
Ash and pumice piled 6 miles (9.7 km) northeast of the volcano to a thickness of 3 feet (0.9 m); 50 miles (80 km) away, the ash was 2 inches (5 cm) deep. Large pyroclastic flows and mudflows subsequently rushed down St.
What happened to all the ash from Mt St Helens?
Much of the ash went to what is now Chesterley Park, out by North 40th Avenue, where it was piled up, with soccer fields eventually built over the entombed ash.
How many states got ash from Mt St Helens?
11 states
The volcano eruption on May 18, 1980, killing 57 people and causing an estimated $1.1 billion in damage. Ash blanketed the Pacific Northwest and stretched into 11 states and Canada.
How much lava came out of Mount St. Helens?
Each of the dome-building episodes added between 1 and 29 million cubic yards of new lava to the dome. Most of the growth occurred when magma extruded onto the surface of the dome, forming short (650 to 1,300 feet), thick (65 to 130 feet) lava flows.
How long does ash stay in the air?
Some of the ash drifted around the globe within about 2 weeks. After circling many more times, most of the ash settled to the Earth’s surface, but some of the smallest fragments and aerosols are likely to remain suspended in the upper atmosphere for years.
What is the biggest ash cloud ever recorded?
The ash plume from the 15 January eruption of the underwater Hunga Tonga-Hunga Ha’apai volcano in Tonga was the largest observed in the modern satellite era, according to Nasa scientists, rising nearly 58 kilometers into the atmosphere — two and a half times as high as any thunderstorm ever recorded.
Did they know Mt St Helens was going to explode?
In 1980, Mt St. Helens’ continued seismicity warned scientists at monitoring stations that the volcano might erupt, but the danger zone around the mountain turned out to be much too small.
How long does volcanic ash stay in the sky?
Depending on several factors, including the size and duration of an eruption, strength and direction of the wind, and distance from the volcano, an area may experience dark conditions for as little as a few minutes or as long as 1-3 days.
Did any life survive the 1980 eruption?
Although the ash-covered ground appeared lifeless after the May 18, 1980, eruption, scientists found that not everything had died. In fact, much to scientists’ surprise, thousands of plants, animals, and fungi survived in much of the disturbed area.
How much bigger would the Yellowstone than Mt. St. Helens?
The three caldera-forming eruptions at Yellowstone (2.1 million years ago, 1.3 million years ago, and 640,000 years ago), were respectively about 2,500, 700, and 1,000 times larger than the 1980 eruption of Mt. St. Helens in the state of Washington.
How much ash did Yellowstone erupt?
The most recent was 640,000 years ago, which formed Yellowstone as we know it and spewed 240 cubic miles of ash, rock and pyroclastic materials over roughly half of what is now the United States.
How far would Yellowstone eruption ash reach?
The eruption could be expected to kill as many as 90,000 people immediately and spread a 10-foot (3-meter) layer of molten ash as far as 1,000 miles (1,609 kilometers) from the park.
How far did ash spread from Mt. St. Helens?
During the 9 hours of vigorous eruptive activity on May 18, 1980, about 540 million tons of ash from Mount St. Helens fell over an area of more than 22,000 square miles (57,000 square kilometers).
How long did it take to clean up after Mount St. Helens?
Mount St. Helens: 40 Years of Recovery | Earth And The Environment.
How loud was Mt. St. Helens?
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!
What happens if you burn ashes?
If you heat the calcium carbonate strongly enough, it will decompose into CO2 and calcium oxide. Apparently, strong heating is likely to result in less carbon instead of a larger percentage.
Can ash be burnt again?
Coals and ashes from fires can remain hot enough to reignite and start a fire for many days after the fire is out. The exact amount of time for complete extinguishment and cooling depends on many factors such as how hot the fire was, what was burning, how much unburned fuel remains, etc.
Can ash get wet?
Experts: Ash mixed with water can form corrosive chemical, damage paint.
What volcano could destroy the world?
the Yellowstone supervolcano
Yellowstone National Park
In the previous 2.1 million years, the Yellowstone supervolcano, which scored an 8 on the Volcanic Explosivity Index, has erupted three times, most recently 640,000 years ago. An eruption at Yellowstone would be beyond anything the human race has ever known.
How old is the oldest cloud on Earth?
Astronomers have discovered the largest and oldest mass of water ever detected in the universe — a gigantic, 12-billion-year-old cloud harboring 140 trillion times more water than all of Earth’s oceans combined.