A magnitude 4.2 earthquake on March 20, 1980 preceded by several smaller earthquakes beginning as early as March 16, was the first substantial indication of Mt. Saint Helens awakening from its 123-year slumber. With a thunderous explosion, widely heard throughout the region around noon on March 27, Mt. Saint Helens began to spew ash and steam, marking the first significant eruption in the conterminous United States since that of Lassen Peak in California. The crown of the ash column rose approximately 6,000 feet above the volcano.
Mount St. Helen Mount St. Helen is a volcano located along the Cascade range which is a volcano chain stretching from Northern California to British Colombia. It now stands at a height of 8,364 feet above sea level. Mount St. Helen was on of the smaller eruptions of five major ones in Washington State. It's elevation before the eruption was 9,677 feet high. On March 29, 1980 after a period of one-hundred and twenty-three years of inactivity a earthquake under the volcano quaked, and seven days later a pheartic (steam) explosions began.
As the ocean floor moves over this “hot spot” at about five inches a year, the outburst lava makes a stable chain of new volcanoes that travel along with the plate - an absolute conveyor belt of volcanic islands. Hawaii itself contains of five linked volcanic mountains that were made by this lava trail increasing from the mantle. Kilauea, the world’s biggest active volcano, is still muffled because the island has however to move totally off the hot spot. The beyond the other islands in the chain are from Hawaii, the greater their age. About 150 miles to the northwest is Oahu, which eruption out of the sea about 3.5 million years ago.
This earthquake is remembered as one of the most destructive natural disasters next to the Galveston hurricane of 1900, and hurricane Katrina of 2005. The death toll is believed to have soared past the 3000+ casualty mark. San Francisco was the 9th largest city in the US, and the largest city on the west coast. Over the years San Francisco had become a financial, trade powerhouse and was even referred to as “gateway to the pacific” because they had the busiest port on the West coast. The initial impact was devastating which left about 300,000 people homeless out of a population of about 410,000.
(live science.com) One of the most memorable rogue wave occurrences was on October 30, 1991. It was called the perfect storm. According to CNN.com, an enormous extra tropical low is creating havoc along the entire Eastern Atlantic Seaboard in this infrared image at 1200 UTC (0700 EST) on October 30, 1991. Labeled the "perfect storm" by the National Weather Service, the storm sank the sword fishing boat Andrea Gail, whose story became the basis for the currently best-selling novel "The Perfect Storm" by Sebastian Junger. Ocean waves peaked at 100 feet, the height of 10-story buildings.
The late William T. Pecora, a former Director of the USGS, was quoted in a May 10, 1968, newspaper article in the Christian Science Monitor as being "especially worried about snow-covered Mt. St. Helens." On the basis of its youth and its high frequency of eruptions over the past 4,000 years, Crandell, Mullineaux, and their colleague Meyer Rubin published in February 1975 that Mount St. Helens was the one volcano in the conterminous United States most likely to reawaken and to erupt "perhaps before the end of this century." This prophetic
Ponds and springs created by the eruption became the centers of life for survivors and colonizers. Today, many areas around the volcano still have a desert-like appearance, but the vast majority of plant and animal species that were found at Mount St. Helens before the 1980 eruption have returned. Some, like the Roosevelt elk, have returned in numbers that far exceed pre-1980 populations. Prairie lupine, a purple-blue wildflower, was also one of the first plants to grow on the barren land. Charlie Crisafulli, a research ecologist, arrived at Mount St. Helens when he was 22 years old.
How many gigatons accumulated in the atmosphere each year due to human activity? (Hint: take the percent we are emitting each year and multiply it by 600; remember 1% = 0.01) 6. Humans are emitting 7.7 gigatons (Gt) of fossil fuel each
The Chilean civil aviation authority said that "the tip of the cloud that has travelled around the world has more or less reached the town of Coyhaique", about 600 kilometres south of the Puyehue-Cordón Caulle. An estimated one hundred million tons of ash, sand and pumice were ejected – requiring power equivalent to 70 atomic bombs. Eruption The Southern Andean Volcano Observatory of Servicio Nacional de Geología y Minería de Chile reported on 27 April 2011, 15:30 local time, an increased seismicity at the Puyehue-Cordón Caulle and set the alert Level to 3, Yellow. Between 20:00 on 2 and 19 June: 59 on 3 June, OVDAS
This was the longest uninterrupted period of expansion since the government started keeping track in 1854.During this time fifteen million new jobs were created and just under twenty trillion dollars worth of good and services were produced. President Reagan inflated the DOD budget. He wanted the Americans to be ready for a war just in case if one ever happened. President Regan also had plains for what he called the “star Wars.” His Plain was to make some kind of shield that would protect us from nuclear missiles. President Reagan also deregulated the lending restrictions for savings and loans.