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149 relations: Alfalfa, Aluminium oxide, Asphyxia, Atmosphere of Earth, Avalanche, Bend, Oregon, British Columbia, Burlington Northern Railroad, Calcium oxide, Carbon dioxide, Cargo ship, Cascade Volcanoes, Castle Rock, Washington, Chinook salmon, Chlorine, Coho salmon, Columbia River, Compass, Complex number, Contiguous United States, Coordinated Universal Time, Cowlitz County, Washington, Cowlitz River, Crater Glacier, Dacite, David A. Johnston, Deer, Denver, Dixy Lee Ray, Drainage basin, Earthquake swarm, Elk, Emotion, Eruption column, Explosion, Federal Emergency Management Agency, Flood stage, Fluorine, Geology of the Pacific Northwest, Gifford Pinchot National Forest, Glacier, Graben, Groundwater, Harmonic tremor, Harry R. Truman, Herbaceous plant, History of the United States, Hydroelectricity, Idaho, Imaginary number, ..., Infrasound, Internal combustion engine, Interstate 90, Iron(III) oxide, Jimmy Carter, Lahar, Lake, Landfill, Landslide, Lassen Peak, Lateral eruption, Lava, Lava dome, Lewis River (Washington), Lightning, List of Cascade volcanoes, Little Boy, Longview, Washington, Magma, Magnesium oxide, Minnesota, Montana, Moon, Mount St. Helens, Mount St. Helens National Volcanic Monument, Mudflow, Mushroom cloud, National Geographic, Newport, Oregon, Northern California, Oklahoma, Oregon, Oregon State University, Pacific Time Zone, Peléan eruption, Petrifaction, Phreatic eruption, Physics, Plinian eruption, Portland, Oregon, Power outage, Provinces and territories of Canada, Pumice, Pyroclastic flow, Pyroclastic rock, Real number, Refractive index, Reid Blackburn, Ring of Fire, Robert Landsburg, Rock (geology), Salmon, Scythe, Seattle, Seismometer, Sewage, Short circuit, Shrubland, Silicon dioxide, Skamania County, Washington, Small Business Administration, Sodium oxide, Speed of sound, Spirit Lake (Washington), Spokane, Washington, Static electricity, Steam, Stratosphere, Stress (biology), Sulfur, Sulfur dioxide, Tephra, The Columbian, The Eruption of Mount St. Helens!, The Museum of Classic Chicago Television, The Oregonian, TNT equivalent, Topography, Toutle River, Turbine, Types of volcanic eruptions, United States Army Corps of Engineers, United States Congress, United States Forest Service, United States Geological Survey, United States International Trade Commission, Volcanic bomb, Volcanic crater, Volcanic Explosivity Index, Volcano, Volcanology, Washington (state), Water treatment, WAV, Weyerhaeuser, Wildfire, Yakima, Washington, Yellowstone National Park, 2004–08 volcanic activity of Mount St. Helens. Expand index (99 more) »
Alfalfa
Alfalfa, Medicago sativa also called lucerne, is a perennial flowering plant in the pea family Fabaceae cultivated as an important forage crop in many countries around the world.
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Aluminium oxide
Aluminium oxide (British English) or aluminum oxide (American English) is a chemical compound of aluminium and oxygen with the chemical formula 23.
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Asphyxia
Asphyxia or asphyxiation is a condition of severely deficient supply of oxygen to the body that arises from abnormal breathing.
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Atmosphere of Earth
The atmosphere of Earth is the layer of gases, commonly known as air, that surrounds the planet Earth and is retained by Earth's gravity.
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Avalanche
An avalanche (also called a snowslide) is a cohesive slab of snow lying upon a weaker layer of snow in the snowpack that fractures and slides down a steep slope when triggered.
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Bend, Oregon
Bend is a city in, and the county seat of, Deschutes County, Oregon, United States.
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British Columbia
British Columbia (BC; Colombie-Britannique) is the westernmost province of Canada, located between the Pacific Ocean and the Rocky Mountains.
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Burlington Northern Railroad
The Burlington Northern Railroad was a United States-based railroad company formed from a merger of four major U.S. railroads.
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Calcium oxide
Calcium oxide (CaO), commonly known as quicklime or burnt lime, is a widely used chemical compound.
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Carbon dioxide
Carbon dioxide (chemical formula) is a colorless gas with a density about 60% higher than that of dry air.
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Cargo ship
A cargo ship or freighter ship is any sort of ship or vessel that carries cargo, goods, and materials from one port to another.
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Cascade Volcanoes
The Cascade Volcanoes (also known as the Cascade Volcanic Arc or the Cascade Arc) are a number of volcanoes in a volcanic arc in western North America, extending from southwestern British Columbia through Washington and Oregon to Northern California, a distance of well over.
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Castle Rock, Washington
Castle Rock is a city in Cowlitz County, Washington, United States.
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Chinook salmon
The Chinook salmon (Oncorhynchus tshawytscha) is the largest species in the Pacific salmon genus Oncorhynchus.
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Chlorine
Chlorine is a chemical element with symbol Cl and atomic number 17.
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Coho salmon
The coho salmon (Oncorhynchus kisutch; Karuk: achvuun) is a species of anadromous fish in the salmon family, one of the several species of Pacific salmon.
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Columbia River
The Columbia River is the largest river in the Pacific Northwest region of North America.
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Compass
A compass is an instrument used for navigation and orientation that shows direction relative to the geographic cardinal directions (or points).
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Complex number
A complex number is a number that can be expressed in the form, where and are real numbers, and is a solution of the equation.
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Contiguous United States
The contiguous United States or officially the conterminous United States consists of the 48 adjoining U.S. states plus Washington, D.C. on the continent of North America.
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Coordinated Universal Time
No description.
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Cowlitz County, Washington
Cowlitz County is a county located in the U.S. state of Washington.
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Cowlitz River
The Cowlitz River is a river in the state of Washington in the United States, a tributary of the Columbia River.
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Crater Glacier
The Crater Glacier (also known as Tulutson Glacier) is a geologically young glacier that is located on Mount St. Helens, in the U.S. state of Washington.
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Dacite
Dacite is an igneous, volcanic rock.
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David A. Johnston
David Alexander Johnston (December 18, 1949 – May 18, 1980) was an American United States Geological Survey (USGS) volcanologist who was killed by the 1980 eruption of Mount St. Helens in Washington.
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Deer
Deer (singular and plural) are the ruminant mammals forming the family Cervidae.
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Denver
Denver, officially the City and County of Denver, is the capital and most populous municipality of the U.S. state of Colorado.
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Dixy Lee Ray
Dixy Lee Ray (September 3, 1914 – January 2, 1994) was an American scientist and politician who served as the 17th Governor of the U.S. state of Washington.
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Drainage basin
A drainage basin is any area of land where precipitation collects and drains off into a common outlet, such as into a river, bay, or other body of water.
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Earthquake swarm
Earthquake swarms are events where a local area experiences sequences of many earthquakes striking in a relatively short period of time.
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Elk
The elk or wapiti (Cervus canadensis) is one of the largest species within the deer family, Cervidae, in the world, and one of the largest land mammals in North America and Eastern Asia.
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Emotion
Emotion is any conscious experience characterized by intense mental activity and a certain degree of pleasure or displeasure.
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Eruption column
An eruption column is a cloud of super-heated ash and tephra suspended in gases emitted during an explosive volcanic eruption.
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Explosion
An explosion is a rapid increase in volume and release of energy in an extreme manner, usually with the generation of high temperatures and the release of gases.
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Federal Emergency Management Agency
The Federal Emergency Management Agency (FEMA) is an agency of the United States Department of Homeland Security, initially created by Presidential Reorganization Plan No.
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Flood stage
Flood stage is the level at which a body of water's surface has risen to a sufficient level to cause sufficient inundation of areas that are not normally covered by water, causing an inconvenience or a threat to life and/or property.
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Fluorine
Fluorine is a chemical element with symbol F and atomic number 9.
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Geology of the Pacific Northwest
The geology of the Pacific Northwest includes the composition (including rock, minerals, and soils), structure, physical properties and the processes that shape the Pacific Northwest region of the United States and Canada.
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Gifford Pinchot National Forest
Gifford Pinchot National Forest is a National Forest located in southern Washington, USA, managed by the United States Forest Service.
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Glacier
A glacier is a persistent body of dense ice that is constantly moving under its own weight; it forms where the accumulation of snow exceeds its ablation (melting and sublimation) over many years, often centuries.
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Graben
In geology, a graben is a depressed block of the Earth's crust bordered by parallel faults.
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Groundwater
Groundwater is the water present beneath Earth's surface in soil pore spaces and in the fractures of rock formations.
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Harmonic tremor
A harmonic tremor is a sustained release of seismic and infrasonic energy typically associated with the underground movement of magma, the venting of volcanic gases from magma, or both.
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Harry R. Truman
Harry R. Truman (October 30, 1896 – May 18, 1980) was a resident of the U.S. state of Washington who lived near Mount St. Helens.
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Herbaceous plant
Herbaceous plants (in botanical use frequently simply herbs) are plants that have no persistent woody stem above ground.
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History of the United States
The history of the United States began with the settlement of Indigenous people before 15,000 BC.
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Hydroelectricity
Hydroelectricity is electricity produced from hydropower.
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Idaho
Idaho is a state in the northwestern region of the United States.
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Imaginary number
An imaginary number is a complex number that can be written as a real number multiplied by the imaginary unit,j is usually used in Engineering contexts where i has other meanings (such as electrical current) which is defined by its property.
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Infrasound
Infrasound, sometimes referred to as low-frequency sound, is sound that is lower in frequency than 20 Hz or cycles per second, the "normal" limit of human hearing.
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Internal combustion engine
An internal combustion engine (ICE) is a heat engine where the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit.
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Interstate 90
Interstate 90 (I-90) is a transcontinental freeway, and the longest Interstate Highway in the United States at.
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Iron(III) oxide
Iron(III) oxide or ferric oxide is the inorganic compound with the formula Fe2O3.
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Jimmy Carter
James Earl Carter Jr. (born October 1, 1924) is an American politician who served as the 39th President of the United States from 1977 to 1981.
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Lahar
A lahar (from wlahar) is a violent type of mudflow or debris flow composed of a slurry of pyroclastic material, rocky debris and water.
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Lake
A lake is an area filled with water, localized in a basin, that is surrounded by land, apart from any river or other outlet that serves to feed or drain the lake.
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Landfill
A landfill site (also known as a tip, dump, rubbish dump, garbage dump or dumping ground and historically as a midden) is a site for the disposal of waste materials by burial.
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Landslide
The term landslide or, less frequently, landslip, refers to several forms of mass wasting that include a wide range of ground movements, such as rockfalls, deep-seated slope failures, mudflows and debris flows.
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Lassen Peak
Lassen Peak, commonly referred to as Mount Lassen, is the southernmost active volcano in the Cascade Range of the Western United States.
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Lateral eruption
A lateral eruption, also called a flank eruption or lateral blast if explosive, is a volcanic eruption that takes place on the flanks of a volcano instead of at the summit.
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Lava
Lava is molten rock generated by geothermal energy and expelled through fractures in planetary crust or in an eruption, usually at temperatures from.
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Lava dome
In volcanology, a lava dome or volcanic dome is a roughly circular mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano.
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Lewis River (Washington)
The Lewis River is a tributary of the Columbia River, about long, in southwestern Washington in the United States.
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Lightning
Lightning is a sudden electrostatic discharge that occurs typically during a thunderstorm.
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List of Cascade volcanoes
This is a list of Cascade volcanoes, i.e. volcanoes formed as a result of subduction along the Cascadia subduction zone in the Pacific Northwest of North America.
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Little Boy
"Little Boy" was the codename for the atomic bomb dropped on the Japanese city of Hiroshima on 6 August 1945 during World War II by the Boeing B-29 Superfortress Enola Gay, piloted by Colonel Paul W. Tibbets, Jr., commander of the 509th Composite Group of the United States Army Air Forces.
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Longview, Washington
Longview is a city in Cowlitz County, Washington, United States.
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Magma
Magma (from Ancient Greek μάγμα (mágma) meaning "thick unguent") is a mixture of molten or semi-molten rock, volatiles and solids that is found beneath the surface of the Earth, and is expected to exist on other terrestrial planets and some natural satellites.
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Magnesium oxide
Magnesium oxide (MgO), or magnesia, is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of magnesium (see also oxide).
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Minnesota
Minnesota is a state in the Upper Midwest and northern regions of the United States.
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Montana
Montana is a state in the Northwestern United States.
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Moon
The Moon is an astronomical body that orbits planet Earth and is Earth's only permanent natural satellite.
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Mount St. Helens
Mount St.
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Mount St. Helens National Volcanic Monument
Mount St.
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Mudflow
A mudflow or mud flow is a form of mass wasting involving "very rapid to extremely rapid surging flow" of debris that has become partially or fully liquified by the addition of significant amounts of water to the source material.
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Mushroom cloud
A mushroom cloud is a distinctive pyrocumulus mushroom-shaped cloud of debris/smoke and usually condensed water vapor resulting from a large explosion.
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National Geographic
National Geographic (formerly the National Geographic Magazine and branded also as NAT GEO or) is the official magazine of the National Geographic Society.
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Newport, Oregon
Newport is a city in Lincoln County, Oregon, United States.
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Northern California
Northern California (colloquially known as NorCal or "The Northstate" for the northern interior counties north of Sacramento to the Oregon stateline) is the northern portion of the U.S. state of California.
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Oklahoma
Oklahoma (Uukuhuúwa, Gahnawiyoˀgeh) is a state in the South Central region of the United States.
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Oregon
Oregon is a state in the Pacific Northwest region on the West Coast of the United States.
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Oregon State University
Oregon State University (OSU) is an international, public research university in the northwest United States, located in Corvallis, Oregon.
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Pacific Time Zone
The Pacific Time Zone (PT) is a time zone encompassing parts of western Canada, the western United States, and western Mexico.
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Peléan eruption
Peléan eruptions are a type of volcanic eruption.
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Petrifaction
In geology, petrifaction or petrification is the process by which organic material becomes a fossil through the replacement of the original material and the filling of the original pore spaces with minerals.
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Phreatic eruption
A phreatic eruption, also called a phreatic explosion, ultravulcanian eruption or steam-blast eruption, occurs when magma heats ground or surface water.
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Physics
Physics (from knowledge of nature, from φύσις phýsis "nature") is the natural science that studies matterAt the start of The Feynman Lectures on Physics, Richard Feynman offers the atomic hypothesis as the single most prolific scientific concept: "If, in some cataclysm, all scientific knowledge were to be destroyed one sentence what statement would contain the most information in the fewest words? I believe it is that all things are made up of atoms – little particles that move around in perpetual motion, attracting each other when they are a little distance apart, but repelling upon being squeezed into one another..." and its motion and behavior through space and time and that studies the related entities of energy and force."Physical science is that department of knowledge which relates to the order of nature, or, in other words, to the regular succession of events." Physics is one of the most fundamental scientific disciplines, and its main goal is to understand how the universe behaves."Physics is one of the most fundamental of the sciences. Scientists of all disciplines use the ideas of physics, including chemists who study the structure of molecules, paleontologists who try to reconstruct how dinosaurs walked, and climatologists who study how human activities affect the atmosphere and oceans. Physics is also the foundation of all engineering and technology. No engineer could design a flat-screen TV, an interplanetary spacecraft, or even a better mousetrap without first understanding the basic laws of physics. (...) You will come to see physics as a towering achievement of the human intellect in its quest to understand our world and ourselves."Physics is an experimental science. Physicists observe the phenomena of nature and try to find patterns that relate these phenomena.""Physics is the study of your world and the world and universe around you." Physics is one of the oldest academic disciplines and, through its inclusion of astronomy, perhaps the oldest. Over the last two millennia, physics, chemistry, biology, and certain branches of mathematics were a part of natural philosophy, but during the scientific revolution in the 17th century, these natural sciences emerged as unique research endeavors in their own right. Physics intersects with many interdisciplinary areas of research, such as biophysics and quantum chemistry, and the boundaries of physics are not rigidly defined. New ideas in physics often explain the fundamental mechanisms studied by other sciences and suggest new avenues of research in academic disciplines such as mathematics and philosophy. Advances in physics often enable advances in new technologies. For example, advances in the understanding of electromagnetism and nuclear physics led directly to the development of new products that have dramatically transformed modern-day society, such as television, computers, domestic appliances, and nuclear weapons; advances in thermodynamics led to the development of industrialization; and advances in mechanics inspired the development of calculus.
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Plinian eruption
Plinian eruptions or Vesuvian eruptions are volcanic eruptions marked by their similarity to the eruption of Mount Vesuvius in 79 AD, which destroyed the ancient Roman cities of Herculaneum and Pompeii.
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Portland, Oregon
Portland is the largest city in the U.S. state of Oregon and the seat of Multnomah County.
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Power outage
A power outage (also called a power cut, a power out, a power blackout, power failure or a blackout) is a short-term or a long-term loss of the electric power to a particular area.
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Provinces and territories of Canada
The provinces and territories of Canada are the sub-national governments within the geographical areas of Canada under the authority of the Canadian Constitution.
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Pumice
Pumice, called pumicite in its powdered or dust form, is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals.
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Pyroclastic flow
A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that moves away from a volcano reaching speeds of up to.
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Pyroclastic rock
Pyroclastic rocks or pyroclastics (derived from the πῦρ, meaning fire; and κλαστός, meaning broken) are clastic rocks composed solely or primarily of volcanic materials.
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Real number
In mathematics, a real number is a value of a continuous quantity that can represent a distance along a line.
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Refractive index
In optics, the refractive index or index of refraction of a material is a dimensionless number that describes how light propagates through that medium.
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Reid Blackburn
Reid Turner Blackburn (August 11, 1952 – May 18, 1980) was an American photographer killed in the 1980 volcanic eruption of Mount St. Helens.
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Ring of Fire
The Ring of Fire is a major area in the basin of the Pacific Ocean where many earthquakes and volcanic eruptions occur.
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Robert Landsburg
Robert Emerson Landsburg (November 13, 1931 – May 18, 1980) was an American photographer who was killed while photographing the 1980 eruption of Mount St. Helens.
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Rock (geology)
Rock or stone is a natural substance, a solid aggregate of one or more minerals or mineraloids.
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Salmon
Salmon is the common name for several species of ray-finned fish in the family Salmonidae.
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Scythe
A scytheOxford English Dictionary, Oxford University Press, 1933: Scythe is an agricultural hand tool for mowing grass or reaping crops.
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Seattle
Seattle is a seaport city on the west coast of the United States.
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Seismometer
A seismometer is an instrument that measures motion of the ground, caused by, for example, an earthquake, a volcanic eruption, or the use of explosives.
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Sewage
Sewage (or domestic wastewater or municipal wastewater) is a type of wastewater that is produced from a community of people.
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Short circuit
A short circuit (sometimes abbreviated to short or s/c) is an electrical circuit that allows a current to travel along an unintended path with no or a very low electrical impedance.
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Shrubland
Shrubland, scrubland, scrub, brush, or bush is a plant community characterised by vegetation dominated by shrubs, often also including grasses, herbs, and geophytes.
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Silicon dioxide
Silicon dioxide, also known as silica (from the Latin silex), is an oxide of silicon with the chemical formula, most commonly found in nature as quartz and in various living organisms.
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Skamania County, Washington
Skamania County is a county located in the U.S. state of Washington.
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Small Business Administration
The Small Business Administration (SBA) is a United States government agency that provides support to entrepreneurs and small businesses.
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Sodium oxide
Sodium oxide is a chemical compound with the formula Na2O.
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Speed of sound
The speed of sound is the distance travelled per unit time by a sound wave as it propagates through an elastic medium.
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Spirit Lake (Washington)
Spirit Lake is a lake north of Mount St. Helens in Washington State.
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Spokane, Washington
Spokane is a city in the state of Washington in the northwestern United States.
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Static electricity
Static electricity is an imbalance of electric charges within or on the surface of a material.
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Steam
Steam is water in the gas phase, which is formed when water boils.
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Stratosphere
The stratosphere is the second major layer of Earth's atmosphere, just above the troposphere, and below the mesosphere.
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Stress (biology)
Physiological or biological stress is an organism's response to a stressor such as an environmental condition.
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Sulfur
Sulfur or sulphur is a chemical element with symbol S and atomic number 16.
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Sulfur dioxide
Sulfur dioxide (also sulphur dioxide in British English) is the chemical compound with the formula.
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Tephra
Tephra is fragmental material produced by a volcanic eruption regardless of composition, fragment size, or emplacement mechanism.
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The Columbian
The Columbian is a daily newspaper for Vancouver, Washington and Clark County in Washington State in the United States.
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The Eruption of Mount St. Helens!
The Eruption of Mount St.
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The Museum of Classic Chicago Television
The Museum of Classic Chicago Television (also known as FuzzyMemories.TV) is an online museum dedicated to the preservation of Chicago television broadcasts.
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The Oregonian
The Oregonian is a daily newspaper based in Portland, Oregon, owned by Advance Publications.
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TNT equivalent
TNT equivalent is a convention for expressing energy, typically used to describe the energy released in an explosion.
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Topography
Topography is the study of the shape and features of the surface of the Earth and other observable astronomical objects including planets, moons, and asteroids.
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Toutle River
The Toutle River is a tributary of the Cowlitz River in the U.S. state of Washington.
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Turbine
A turbine (from the Latin turbo, a vortex, related to the Greek τύρβη, tyrbē, meaning "turbulence") is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work.
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Types of volcanic eruptions
Several types of volcanic eruptions—during which lava, tephra (ash, lapilli, volcanic bombs and volcanic blocks), and assorted gases are expelled from a volcanic vent or fissure—have been distinguished by volcanologists.
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United States Army Corps of Engineers
The United States Army Corps of Engineers (USACE) is a U.S. federal agency under the Department of Defense and a major Army command made up of some 37,000 civilian and military personnel, making it one of the world's largest public engineering, design, and construction management agencies.
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United States Congress
The United States Congress is the bicameral legislature of the Federal government of the United States.
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United States Forest Service
The United States Forest Service (USFS) is an agency of the U.S. Department of Agriculture that administers the nation's 154 national forests and 20 national grasslands, which encompass.
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United States Geological Survey
The United States Geological Survey (USGS, formerly simply Geological Survey) is a scientific agency of the United States government.
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United States International Trade Commission
The United States International Trade Commission (USITC, sometimes I.T.C.) is an independent, bipartisan, quasi-judicial, federal agency of the United States that provides trade expertise to both the legislative and executive branches.
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Volcanic bomb
A volcanic bomb is a mass of molten rock (tephra) larger than 64 mm (2.5 inches) in diameter, formed when a volcano ejects viscous fragments of lava during an eruption.
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Volcanic crater
A volcanic crater is a roughly circular depression in the ground caused by volcanic activity.
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Volcanic Explosivity Index
The Volcanic Explosivity Index (VEI) is a relative measure of the explosiveness of volcanic eruptions.
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Volcano
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
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Volcanology
Volcanology (also spelled vulcanology) is the study of volcanoes, lava, magma, and related geological, geophysical and geochemical phenomena.
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Washington (state)
Washington, officially the State of Washington, is a state in the Pacific Northwest region of the United States.
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Water treatment
Water treatment is any process that improves the quality of water to make it more acceptable for a specific end-use.
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WAV
Waveform Audio File Format (WAVE, or more commonly known as WAV due to its filename extension - both pronounced "wave") (rarely, Audio for Windows) is a Microsoft and IBM audio file format standard for storing an audio bitstream on PCs.
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Weyerhaeuser
Weyerhaeuser (pronounced "Warehouser") Company, is one of the world's largest private owners of timberlands, owning or controlling nearly 12.4 million acres of timberlands in the U.S. and managing additional 14.0 million acres timberlands under long-term licenses in Canada.
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Wildfire
A wildfire or wildland fire is a fire in an area of combustible vegetation that occurs in the countryside or rural area.
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Yakima, Washington
Yakima is a U.S. city, the county seat of Yakima County, Washington and the state's eleventh largest city by population.
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Yellowstone National Park
Yellowstone National Park is an American national park located in Wyoming, Montana, and Idaho.
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2004–08 volcanic activity of Mount St. Helens
The 2004–2008 volcanic activity of Mount St. Helens, Washington, United States has been documented as a continuous eruption in the form of gradual extrusion of magma.
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Redirects here:
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References
[1] https://en.wikipedia.org/wiki/1980_eruption_of_Mount_St._Helens
