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Mount St. Helens

Mount St. Helens is an active volcano in Washington State's Cascade mountain range. Mount St. Helens erupted on May 18, 1980, causing the most deadly volcanic event in United States history.

397 Questions

Is the island of st Helen inhabited today?

No, the island of St. Helena is not completely uninhabited; it has a small population of around 4,500 residents. Located in the South Atlantic Ocean, it is known for its historical significance and was famously the place of Napoleon Bonaparte's exile. The island has a unique ecosystem and limited accessibility, primarily served by a regular flight and a shipping route.

Can you go in the crater at mount St Helen's?

Yes, visitors can access the crater at Mount St. Helens, but only through guided tours operated by the U.S. Forest Service. These tours typically begin at the Johnston Ridge Observatory and provide a safe way to view the crater and learn about the volcanic activity. Access may be restricted or require permits, especially during certain times of the year or due to volcanic activity. Always check for current conditions and regulations before planning a visit.

How did people prepare for mount st helens eruption?

Before the eruption of Mount St. Helens in 1980, people prepared by monitoring seismic activity and volcanic gas emissions, which indicated an impending eruption. Authorities issued evacuation orders for those living nearby and established exclusion zones to ensure public safety. Local residents participated in emergency preparedness drills and were advised to have emergency supplies ready. Additionally, scientists and volcanologists provided updates and guidance to help communities respond effectively to the evolving volcanic activity.

What types of methods did geologists use to predict the Mount Saint Helen's eruption?

Geologists used a combination of methods to predict the Mount St. Helens eruption, including seismic monitoring to detect earthquake activity, which indicated magma movement beneath the surface. They also employed gas measurements to analyze volcanic gases emitted from the volcano, as changes in gas composition can signal impending eruptions. In addition, ground deformation measurements helped track the swelling of the volcano, revealing the accumulation of magma. These methods, combined with historical data and geological studies, allowed scientists to assess the risk of an eruption.

What where the long term responses to the 1980 mt st helens eruption?

The long-term responses to the 1980 Mount St. Helens eruption included extensive geological research to understand volcanic activity and improve eruption forecasting. The U.S. Forest Service and other agencies implemented land management strategies focused on ecosystem recovery and monitoring. Additionally, the eruption led to enhanced public awareness and education regarding volcanic hazards, resulting in updated emergency response plans. Restoration efforts aimed at rehabilitating the affected landscapes also contributed to ecological recovery over the decades following the event.

How much damage to wildlife did mt st helens do?

The eruption of Mount St. Helens in 1980 caused significant destruction to local wildlife and their habitats. Approximately 230 square miles of forest were devastated, leading to the loss of many animal species and their ecosystems. However, in the long term, the area has shown remarkable ecological recovery, with various species returning and new habitats forming in the wake of the eruption. The event highlighted the resilience of nature and the complex dynamics of ecosystem recovery.

How big is mt st helens in square metres?

Mount St. Helens has an elevation of 2,550 meters (8,366 feet) and a surface area of approximately 1,400 square kilometers, which converts to about 1.4 billion square meters. The mountain's size can vary based on volcanic activity and erosion over time. Its prominent crater, formed during the 1980 eruption, has also changed the mountain's shape and dimensions.

How many people died in the 2008 eruption of mount st helens?

The 2008 eruption of Mount St. Helens did not result in any fatalities. The volcano's activity was primarily characterized by dome-building eruptions that posed minimal risk to nearby populations, as extensive monitoring and evacuation plans were in place. The eruption, which began in October 2004 and continued through 2008, was closely observed by scientists, ensuring public safety.

How dangerous was the eruption of mount St Helen's in 2008?

The eruption of Mount St. Helens in 2008 was relatively low in danger compared to its catastrophic 1980 eruption. While it produced significant volcanic activity, including ash emissions and minor lava dome growth, there were no fatalities or major injuries reported. The U.S. Geological Survey closely monitored the volcano, and the surrounding areas were well-prepared for potential hazards, minimizing risks to the public. Overall, the 2008 activity was significant but not as destructive as previous eruptions.

How many did the eruption of Mount St helens kill in July 10 2008?

The eruption of Mount St. Helens did not occur on July 10, 2008. The most significant eruption of the volcano took place on May 18, 1980, which resulted in 57 fatalities. There were no fatalities associated with any eruptions in July 2008, as the volcano was relatively quiet during that time.

In what you.s. State is mount st. Helena?

Mount St. Helena is located in the state of California. It is part of the Mayacamas Mountains and is situated within the Napa County region. The mountain is known for its hiking trails and scenic views, attracting outdoor enthusiasts and nature lovers.

How is life on Mount St. hellens?

Life on Mount St. Helens is characterized by its unique and dynamic ecosystem, shaped by volcanic activity. The surrounding areas feature a mix of regenerating forests, diverse wildlife, and volcanic landscapes, resulting from the 1980 eruption. Flora and fauna have gradually returned, with species adapted to the harsh conditions finding their niches. The area also attracts researchers and visitors interested in studying volcanic activity and natural regeneration.

What shape is mount st helens?

Oh, dude, Mount St. Helens is a volcano, so it's like a big ol' mountain with a crater at the top. So, I guess you could say it's kind of like a cone shape? But, like, don't go trying to put it in a geometry textbook or anything.

How much ash covered Harry Trumans house in the mount st helens eruption?

Around 6 inches of ash covered Harry Truman's house during the Mount St. Helens eruption in 1980. Unfortunately, Truman and his house were both buried under the ash and debris, resulting in his tragic death.

How does the viscosity affect of lava affect its flow rate?

Viscosity means how runny it is. Thus a lava with low viscosity will erupt fast and form long, wide spreading lava flows (eg Hawaii) and lavas of high viscosity will erupt slowly and form lava domes (eg Mt. St. Helens).

What happened to make mount st Helens have a pyroclastic flow?

When Mt. st Helen's erupted it had a pyroclastic flow because all of its magma was high in silica so it cloged the pipe when the magma was trying to leave so when it finally exploded it came down as a pyroclastic flow

When will mount saint helens erupt?

Predicting volcanic eruptions although part of the science of volcanology is the most difficult thing to successfully accomplish. The times between eruptions of volcanoes varies, and does not follow an exact pattern or time frame between eruptions. The only way that scientists have an idea of when a volcano will next erupt is when the volcano starts showing signs of unrest, and than it still depends heavily on what types of unrest the scientists are witnessing.

Is mt st Helen still active or extinct or dormant?

Definitely still active.

Mt. St. Helens recently had quite a little cough- up (during the early 2000's). And geologic time is very different from human time; a volcano that has erupted during the Helocene (a special geological name for a time period beginning 12,000 years ago) is considered to be active.

Did Mount St. Helens erupt with little warning?

The eruption of Mt. St. Helens on May 18, 1980 did give significant warning before the actual large eruption took place. There was a period of a month and a half of unrest before the flank collapse and lateral blast events took place.

The unrest began being documented March 15, 1980, however it was not immediately recognized as possibly being a precursor to a volcanic event. The seismic events were first recognized as precursor activity on March 20th, 1980 with a magnitude 4.2 under the north flank of the volcano (Which also turned out to be the eruptive and failure point of the volcano on May 18).

For further and detailed readings on the precursor events before the triggered eruption please see related links for the Cascade Volcanoes Observatory.

How big was the cryptodome on the side of mount st helens?

The cryptodome on the side of Mount St. Helens was approximately 1,300 feet long, 65 feet wide, and 40 feet high. It was a large bulge caused by rising magma beneath the volcano before its 1980 eruption.

What type of lava flow was mount st Helens?

Dacite, a volcanic rock with about 65% silica. This amount of silica in dacite is a lot higher than the basalts of Hawaii which have less than 50% silica. The high silica content makes the magma "sticky" and can cause more pressure to build up. With so much pressure, eruptions from Mount St. Helens can be very violent like the famous 1980 eruption.

How far away is the Columbia river from Mount St Helens?

Mount St. Helans is aproximatly 120km or 75 miles away from the pacific ocean.

Is mount saint helens the tallest volcano in the us?

No. Mount Bona in Alaska is the tallest volcano in the United States at 16,421 feet and Mount Rainier is the tallest in the continental U.S. at 14,441 feet. Mount St Helens is significantly shorter at 8,363 feet. Even before the 1980 eruption, Mount St Helens was 9,677 feet.