Mt. St. Helens, Washington. Plug Cascades Bomb Aerodynamically shaped.

Slides:

Advertisements

Similar presentations

Lecture 9: Volcanic Hazards Our Hazardous Environment GEOG 1110 Dr. Thieme.

Advertisements

Volcanism The study of volcanoes and their activities.

Warm Up Why was the Mt. St. Helens Eruption so destructive?

Volcanic Hazards Landslides Ash fall Pyroclastic flow Lahar Lava flow.

Volcanoes: eruptive style and associated landforms

Other volcanic features

VOLCANO JEOPARDY Volcano Formation It’s Gonna Blow! Ashes to Ashes Types of Volcanoes

1 Volcanoes. 2 Different Volcanic Settings 3 Types of Eruptions Eruptions will generally be of two types: Quiet (Rift) eruptions Explosive (Subduction)

Volcanoes A Hot Topic.

Volcanoes A Hot Topic. What is a volcano? A mountain formed by lava and/or pyroclastic material.

Volcanic Hazards in the U.S.. Outline Cascades –Mt. St. Helens –Mt. Rainier –Crater Lake –Mt. Shasta –Lassen Other eruptions –Yellowstone –Long Valley.

High Cascades Modern Volcanoes of the Pacific NW Mt. St. Helens, July 27, 2005.

Quick Review…….. What are the three main sections the earth is divided into? The ________________ is the rigid crust and uppermost portion of the mantle,

3 Basic Volcanic “Products”: 1. LAVA: Aa (flows like pile of black gravel)

Mt. Unzen, Japan, 1991 Dormant for 200 years Woke up in 1990; erupted into 1992 Lots of pyroclastics Killed the Krafts and Harry Glicken, a survivor of.

The Eruption Mount St Helens'. Pictures The Facts Fifty-seven people were killed It was triggered by an earthquake It was also the biggest landslide.

Volcanic Hazards Primary Effects -lava flows -pyroclastic eruptions -poisonous gas emissions Secondary Effects -mudflows and debris avalanches -flooding.

VOLCANOES. Volcano Basics Active – a volcano that has erupted recently (geologically speaking) Dormant – (sleeping) has erupted within the past few thousand.

Volcanic Hazards p , web reading

VOLCANOES. A few volcano basics… Active – a volcano that has erupted recently (geologically speaking) Dormant – (sleeping) has erupted within the past.

Outline Hazards Mt. St. Helens Case Study Precursors

Including but not limited to how they erupt, the accompanying hazards, the life cycle, features and predicting eruptions.

Our Hazardous Environment GEOG 1110 Dr. Thieme

VOLCANIC Magma Types Chapter 18.

Volcano Eruptions ~ What comes out of a volcano when it erupts?

Volcanoes Vocabulary that you are accountable for is underlined! Eruption in Indonesia 1/8/2014.

Mount St. Helens April 10, On March 20, 1980, after a quiet period of 123 years, earthquake activity once again began under Mt. St. Helens. March.

Jeopardy start Plutons Magma Tephra Cones Eruptions.

Plate Tectonics. Crust The crust is formed from continental and oceanic crust The crust covers the whole Earth.

Volcanic activity sites along boundaries Where do volcanoes occur—and why? Divergent [MOR] boundaries – About 75% of erupted lava is found here – Basaltic.

MAGMA is molten rock, but is not just liquid - also contains bits of rock crystals and gas. It ranges in consistency from wet concrete to thick oatmeal.

1 Volcanoes Volcano Cam. 2 Different Volcanic Settings.

Volcanoes and Plate Tectonics Volcanic Activity Volcanic Landforms Name That VolcanoTime to Draw! Bonus Question: 5000 pts.

Volcanoes. l Evidence that we live in an active planet l The gods of the underworld l Millions of people live near active volcanoes –The greatest geological.

Ch 3 Volcano & Extrusives

Mount St. Helens We are here.

Volcano Notes Chapter 18.

Nevado Del Ruiz Eruption 1985

Volcanoes Jessica Redmond. What is a super volcano? A Super Volcano or a super volcanic eruption is an eruption that ejects greater than 240 cubic miles.

Magma is a mixture of melted rock and hot gasses..

Mount St Helens By Ashleigh and Abi!. Mount St Helens March 1980 sign that the volcano was going to erupt. Earthquakes alert positive eruption. USGS.

Rock melts when the temperature within the earth (geotherm) exceeds the melting point (solidus) of rock. This happens for different reasons at (1) subduction.

VOLCANOES ERUPTING MOUNTAINS. VOLCANOES What is a volcano? What is a volcano? A volcano is a mountain caused by erupting lava from the mantle. A volcano.

Mount St. Helens The Eruption. Where is Mount St. Helens? Mt. St Helens is in Washington state 96 miles (154km) south of Seattle and 50 miles (80km) north.

Volcanoes 2. Shield Volcanoes: broad at the base with gently sloping sides Form from: quiet eruptions Example: Hawaiian Islands Types of Volcanoes.

BY RHIANNON AND RACHAEL. An eruption of hot volcanic ash rose 80,000 feet (24,400m) into the sky. At the same time, ice, snow and several glaciers which.

Volcanic Hazards. LAVA Lava often poses the least risk in an eruption Lava often poses the least risk in an eruption It is partly the thickness of the.

Volcano Rocks & Landforms

1 / 48 Volcanic Hazards. 2 / 48 Volcanic Hazards Direct –Lava Flows –Eruptions / Explosions –Pyroclastic Flows –Ashfall –Mudflows/Lahars –Gas –Caldera.

Volcanoes For the Advanced Earth and Space Science Student.

Volcanoes. Definition A volcano is an opening, or rupture, in a planet's surface or crust, which allows hot, molten rock, ash, and gases to escape from.

Table of Contents Volcanoes and Plate Tectonics Volcanic Eruptions Volcanic Landforms Volcanoes.

Volcanoes. Volcanoes are classified in one of three ways.

May 31, 2016 Learning Target: I will know the characteristics of 3 types of volcanoes. Entry Task: Be ready for new seats Earthquake test data & review.

What is a volcano? What do we know about volcanoes?

Magma and Lava Major Volcanic Zones Types of Eruptions Types of

VOLCANOES Their Products Peter Copley Feb 04.

StratoVolcano Mt Rainier from the west. Stan Shebs. 11/13/13 (

Mount St. Helens, 1980 eruption

Our Geologic Environment

Kilauea volcano on Hawaii - the Earth’s most active volcano

Mt. St. Helens, pre-1980.

Volcanoes Mt. Etna, Sicily, Italy August 5, 1997 with city lights.

Presentation transcript:

Mt. St. Helens, Washington

Plug

Cascades

Bomb Aerodynamically shaped

Pyroclastic Flow >1000 o F >100MPH Poisonous gas

Mount Pelee 1902 Damage done by pyroclastic flow

St. Helens 1 Mt. St. Helens eruption First signs of an eruption: 1) Gas emissions, the more the better. 2) Increased seismic activity.

St. Helens Bulge Bulge grew up to 3 feet per day!

St. Helens Lateral Blast Bulge collapsed, resulting in a large landslide. Magma chamber exposed.

St. Helens Main Blast

St. Helens Before Mt. St. Helens before…

St. Helens After Mt. St. Helens after.

Mt. Rainier 4X Mt. St. Helens Steepest part of mountain faces Seattle

Villarrica volcano, Chile

Lahar Hot mud flow

Nevado del Ruiz volcano

Lahar Consistency of flowing concrete

Village

Rainier Lahars

Volcanoes of The World

Famous Volcanic Eruptions Year without a summer in NE Sound heard 4000 miles away Largest eruption in past 100 years

Caldera Volcanoes Yellowstone: Eruption every 600,000 years Last eruption: 2500km 3 of material Toba: 90,000 years ago. Reduced Earth’s human population to about 5000 people.

Long Valley Caldera Map

Long Valley Caldera

Caldera Collapse

Bishop Tuff

Yellowstone Hot Spot

Yellowstone

Yellowstone Fallout

Volcanic Aerosols SO 2 Mt. Pinatubo, 1991: 20 tons F cooling for two years Tambora, 1815: >100 tons 2 0 F cooling

Zones of Volcanism