What major hazard is associated with Mt Rainier in Washington?
Debris flows (lahars) pose the greatest hazard to people near Mount Rainier. A debris flow is a mixture of mud and rock debris that looks and behaves like flowing concrete.
What primary volcanic hazard exists in Orting Washington where the manager has offered to sell the house?
The manager says that Mt. Rainier is a volcano, but assures you, “it has not erupted for a long time and there is no risk associated with it.” In fact, she has offered to sell you her home in nearby Orting, WA for what seems like a good price.
Which of these volcanic hazards associated with Mount Rainier?
Glacial outburst floods at Mount Rainier result from sudden release of water stored within or at the base of glaciers. Outburst floods and the lahars they often trigger pose a serious hazard in river valleys on the volcano.
Which site associated with Mount Rainier has the highest hazard for lava flows?
For example, the greatest hazard from lahars generated by landslides is on the west side of the volcano because it contains the largest amount of hydrothermally weakened rock.
What type of volcanic hazard most threatens Seattle Washington?
Due to its high probability of eruption in the near future, Mount Rainier is considered one of the most dangerous volcanoes in the world, and it is on the Decade Volcano list. The large amount of glacial ice means that Mount Rainier could produce massive lahars which could threaten the entire Puyallup River valley.
What is a main hazard of this type of volcano?
Several hazards may affect the area around the volcano, such as lava flows, pyroclastic flows, lahars, jökulhlaups and landslides or debris avalanches. Volcanic activity also produces hazards that can affect areas far from the volcano, such as tephra or ash falls, releases of gas and tsunamis.
What volcanic hazard would form when glaciers on Mt Rainier melt during an eruption?
The most likely hazards at Mount Rainier are debris avalanches, lahars, and floods (Crandell and Mullineaux, 1967; Crandell, 1973; Scott and others, 1992; U.S. Geodynamics Committee, 1994), as well as hazards that occur during eruptions, such as tephra, ballistic projectiles, pyroclastic flows and surges, lava flows, …
What happens to Seattle if Mt Rainier erupts?
Routes connecting Tacoma to Seattle could be buried. Tacoma could face shortages of food and supplies. Many of its hydroelectric dams and water sources also lie in lahar zones. Then, there are long-term problems: Decades of flooding and erosion as rivers cut through fresh lahar deposits.
What type of eruption does Mount Rainier have?
Mount Rainier is an episodically active composite volcano, also called a stratovolcano. Volcanic activity began between one half and one million years ago, with the most recent eruption cycle ending about 1,000 years ago.
What happens when Mt Rainier erupts?
It would be hot, and it would melt the ice and snow. And tumble over cliffs. “The lava flows encounter those very steep slopes and make avalanches of hot rocks and gas that are hurtling down the mountain maybe 100 miles per hour or so,” Driedger says.
What is the most harmful volcanic hazard?
Historically, lahars have been one of the deadliest volcano hazards. They can occur both during an eruption and when a volcano is quiet.
Which of the following are the primary gases that erupt from volcanoes?
Ninety-nine percent of the gas molecules emitted during a volcanic eruption are water vapor (H2O), carbon dioxide (CO2), and sulfur dioxide (SO2). The remaining one percent is comprised of small amounts of hydrogen sulfide, carbon monoxide, hydrogen chloride, hydrogen fluoride, and other minor gas species.
What type of lava does Mt Rainier have?
andesite lava flows Much of Mount Rainier is composed of andesite lava flows. Lava flows may accompany explosive eruptive activity, but they occur more often after explosive activity declines. The term "andesite" refers to the chemical composition of the rock.
What type of volcano is Mount Rainier quizlet?
ALSO CALLED STRATOVOLCANO. A cone-shaped volcano whose steep sides are formed by loose, fragmented cinders that fall to the Earth close to the vent. The lava flows through a single vent that is usually only up to about 1,000 feet tall. There is usually a bowl-shaped crater at the top.
Is Mount Rainier a threat to Seattle?
Because of its elevation (4,392 m), relief, hydrothermal alteration, icecap, glacier-fed radial valleys, and proximity to encroaching suburbs of the Seattle-Tacoma metropolis, Mount Rainier is the most threatening volcano in the Cascades.
What are the primary hazards of a volcano?
What are the hazards from volcanoes?
- Lava. Lava (molten rock) can erupt as fire fountains or lava flows (when it is runny) or as steep-sided domes (when it is viscous). …
- Pyroclastic flows. …
- Phreatic explosions. …
- Lahars. …
- Jökulhlaups. …
- Landslides. …
- Volcanic earthquakes. …
- Tsunamis.
What are the main volcanic hazards?
Several hazards may affect the area around the volcano, such as lava flows, pyroclastic flows, lahars, jökulhlaups and landslides or debris avalanches. Volcanic activity also produces hazards that can affect areas far from the volcano, such as tephra or ash falls, releases of gas and tsunamis.
What is the main hazard of this type of volcano?
Several hazards may affect the area around the volcano, such as lava flows, pyroclastic flows, lahars, jökulhlaups and landslides or debris avalanches. Volcanic activity also produces hazards that can affect areas far from the volcano, such as tephra or ash falls, releases of gas and tsunamis.
What is a common hazard of this type of volcano?
What are the hazards from volcanoes?
- Lava. Lava (molten rock) can erupt as fire fountains or lava flows (when it is runny) or as steep-sided domes (when it is viscous). …
- Pyroclastic flows. …
- Phreatic explosions. …
- Lahars. …
- Jökulhlaups. …
- Landslides. …
- Volcanic earthquakes. …
- Tsunamis.
What type of volcano is Mount Rainier?
stratovolcano Mount Rainier is an episodically active composite volcano, also called a stratovolcano. Volcanic activity began between one half and one million years ago, with the most recent eruption cycle ending about 1,000 years ago.
What is the plate tectonic setting of Mount Rainier quizlet?
The tectonic setting for Mt. Rainier is a divergent boundary and subduction zone of the Juan de Fuca Plate and the North American Plate. The type of magma that will erupt from Mt. Rainier is andesite.
Is a lahar a primary or secondary hazard?
Lahars. Lahars are another secondary hazard and they are mud and debris that flows down the sides of volcanoes. They are mobilised by water and can be incredibly destructive.
What are the primary and secondary effects of volcanic eruptions?
VOLCANIC HAZARDS 3 Primary hazards are direct hazards from eruption such as pyroclastic flows, pyroclastic falls, lava flows and poisonous gas release. The secondary hazards are the indirect consequences such as lahars, tsunamis and epidemic disease and post-eruption famine.
What kind of plate tectonic boundary is Mt Rainier associated with?
The Cascade Range, in which Mount Rainier is located, is a perfect example of a fundamental concept in geology. It involves a common convergent interaction between tectonic plates where two plates collide and the resulting chain of volcanoes that forms parallel to and inland from the plate boundary.
What plate boundary caused Mt Rainier?
Mount Rainier (Figure 2.1) is one of about two dozen recently active volcanoes in the Cascade Range, a volcanic arc formed by subduction of the Juan de Fuca plate beneath the North American plate. Volcanism in this arc began at least 37 million years ago and has continued intermittently to the present.
What are primary hazards of volcanoes?
VOLCANIC HAZARDS 3 Primary hazards are direct hazards from eruption such as pyroclastic flows, pyroclastic falls, lava flows and poisonous gas release. The secondary hazards are the indirect consequences such as lahars, tsunamis and epidemic disease and post-eruption famine.
What are primary hazards?
Primary hazards are caused by the direct interaction of seismic wave energy with the ground. In most situations, this is limited to fault rupture and ground shaking.
Which of the following is a primary effect of a volcanic eruption?
Volcanoes spew hot, dangerous gases, ash, lava, and rock that are powerfully destructive. People have died from volcanic blasts. Volcanic eruptions can result in additional threats to health, such as floods, mudslides, power outages, drinking water contamination, and wildfires.
How was Mt Rainier volcano formed?
Modern Mount Rainier was built by numerous eruptions over the last 500,000 years, alternating between periods of high volume and low volume eruptions. These eruptions built up layer after layer of lava and loose rubble, eventually forming the tall cone that characterizes composite volcanoes.
What caused Mount Rainier to form?
Modern Mount Rainier was built by numerous eruptions over the last 500,000 years, alternating between periods of high volume and low volume eruptions. These eruptions built up layer after layer of lava and loose rubble, eventually forming the tall cone that characterizes composite volcanoes.