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David Johnston was melted by the gasses of Mt.st.Helens. Harry Truman

was killed by a pyroclastic flow, burying him and his lodge under 150 feet of volcanic debris. Overall, they were both killed by the pyroclastic flows.

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How did David A Johnston die?

David A. Johnston, the vulcanologist, was killed when he was manning an observation point on Mount St. Helens when it erupted in 1980. He was swept away by the blast created by the collapse of the mountain's north flank.


What is the scientist name that studied volcanos?

There are a number of famous geologists:Charles LyellJames HuttonAlfred WegenerArthur HolmesDrummond MatthewsFrederick VineWalter AlvarezThe above list is far from exhaustive!Please see the related link for more information about these geologists.


Who was the president when Israel became an independent nation?

The first Prime Minister of Israel was David Ben Gurion, and the first President was Chaim Weizmann. It is important to note that in Israel, the President is a largely ceremonial position; the Prime Minister wields actual power.Israel's independence was declared on May 14, 1948, and its first election held on February 19, 1949, both during the administration of President Harry S Truman in the US.


Who is better juan mata or david silva?

its david silva


What were the long-term responces of the eruption of mt st helens?

St. Helens released an amount of energy equivalent to 27,000 Hiroshima-sized nuclear weapons and ejected more than 1 cubic mile (4 km³) of material. A quarter of that volume was fresh lava in the form of ash, pumice, and volcanic bombs while the rest was fragmented, older rock. The removal of the north side of the mountain (13% of the cone's volume) reduced St. Helens' height by about 1,313 feet (400 m) and left a crater 1 to 2 miles (2 to 3 km) wide and 2,100 feet (640 m) deep with its north end open in a huge breach. More than 4 billion board feet (14.6 km³) of timber was damaged or destroyed, mainly by the lateral blast. Downwind of the volcano, in areas of thick ash accumulation, many agricultural crops, such as wheat, apples, potatoes, and alfalfa, were destroyed. As many as 1,500 elk and 5,000 deer were killed, and an estimated 12 million Chinook and Coho salmon fingerlings died when their hatcheries were destroyed. Another estimated 40,000 young salmon were lost when they swam through turbine blades of hydroelectric generators when reservoir levels were lowered along the Lewis River to accommodate possible mudflows and flood waters. The ash fall created some temporary but major problems with transportation, sewage disposal, and water treatment systems. Visibility was greatly decreased during the ash fall, closing many highways and roads. Over a thousand commercial flights were cancelled following airport closures. Fine-grained, gritty ash caused substantial problems for internal-combustion engines and other mechanical and electrical equipment. The ash contaminated oil systems and clogged air filters, and scratched moving surfaces. Fine ash caused short circuits in electrical transformers, which in turn caused power blackouts. There were also indirect and intangible costs of the eruption. Unemployment in the immediate region of Mount St. Helens rose tenfold in the weeks immediately following the eruption By Nii Lomotey Engmann