The largest landslide recorded in the history:Eruption of Mount St. Halens
On May 18, 1980, an earthquake hit the northern face of Mount St. Helens in Washington State, causing the largest landslide recorded in the history and a large volcanic eruption that spread ash across dozens of states. The sudden side blast that was heard hundreds of miles away, removed 1,300 feet from the top of the volcano, sending shock waves and heat flows through the surrounding landscape, flattening forests, melting snow and ice, and generating massive mudflows. This disaster killed 57 peoples.
Sunday's earthquake, May 18, 1980, caused the entire weak north face to slide, causing the largest ever landslide.This allowed the partially molten, high-pressure and steam-rich rocks in the volcano to suddenly explode toward Lake Spirit in a hot mix of ancient lava and crushed ancient rocks, by passing the face of collapse.
The eruption column rose about 80,000 feet above the atmosphere and ash precipitated in 11 American states and a significant ash in two Canadian provinces. Meanwhile, snow, ice, and many glaciers melted all over the volcano, forming a chain of large slides that reached the Columbia River, about 50 miles (80 km) southwest.Less intense explosions continued the next day, but were followed by other major, but not devastating, explosions later that year. The thermal energy released during the burst was 26 megaton tons of TNT. Hundreds of square miles were transformed into barren land, causing damage of more than a billion dollars (equivalent to $ 3.4 billion in 2019), killing thousands of animals, leaving Mount St. Helen with a crater on the north side.
On May 18, 1980, an earthquake hit the northern face of Mount St. Helens in Washington State, causing the largest landslide recorded in the history and a large volcanic eruption that spread ash across dozens of states. The sudden side blast that was heard hundreds of miles away, removed 1,300 feet from the top of the volcano, sending shock waves and heat flows through the surrounding landscape, flattening forests, melting snow and ice, and generating massive mudflows. This disaster killed 57 peoples.
Sunday's earthquake, May 18, 1980, caused the entire weak north face to slide, causing the largest ever landslide.This allowed the partially molten, high-pressure and steam-rich rocks in the volcano to suddenly explode toward Lake Spirit in a hot mix of ancient lava and crushed ancient rocks, by passing the face of collapse.
The eruption column rose about 80,000 feet above the atmosphere and ash precipitated in 11 American states and a significant ash in two Canadian provinces. Meanwhile, snow, ice, and many glaciers melted all over the volcano, forming a chain of large slides that reached the Columbia River, about 50 miles (80 km) southwest.Less intense explosions continued the next day, but were followed by other major, but not devastating, explosions later that year. The thermal energy released during the burst was 26 megaton tons of TNT. Hundreds of square miles were transformed into barren land, causing damage of more than a billion dollars (equivalent to $ 3.4 billion in 2019), killing thousands of animals, leaving Mount St. Helen with a crater on the north side.
0 Comments
For some thing wrong comment there