Todays Plan

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Todays Plan

• Volcanic Hazards workshop
• Introduction
• Training
• Assessment/discussion

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Workshop Agenda

• Background
• Training
• Your WarmUp answers
• Assessment

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(No Transcript)
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Composite Volcano
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Eruptive Style Composition

• Basalt lava flows (shield) - think Hawaii

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Eruptive Style Composition

• Flood basalt flows - think Columbia River basalts
  (18-6 million yrs old)

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Eruptive Style Composition

• Andesite lava flows (composite) - think Mt Baker

USGS photo by R. Iverson, USGS/CVO, 9/8/1997
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Eruptive Style Composition

• Rhyolite pyroclastic eruptions (sm. caldera) -
  think Crater Lake

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Eruptive Style Composition

• Rhyolite pyroclastic flows (from composite volc.)
  - think
• Mt. St. Helens
• Soufriere Hills
• Mt. Pinatubo

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Questions to think about in video

• What volcanic hazard affects many, but kills few?
• What is the main volcanic hazard for Bellingham?
• What is the least important hazard for Bellingham?

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Turn on the International Volcanic Hazards
Training Video now.
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Your Answers Magma Viscosity

• What (A) increases or (B) decreases the viscosity
  of a magma? (This is important because more
  viscous magmas erupt more violently)

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Question X

• Which of the following volcanic hazards affects
  many, but kills few?
• Pyroclastic Ash Fall
• Lahar (mudflow)
• Pyroclastic Ash Flow (nuée ardente)
• Tsunami

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Question X

• Which of the following volcanic hazards affects
  many, but kills few?
• Pyroclastic Ash Fall
• Lahar (mudflow)
• Pyroclastic Ash Flow (nuée ardente)
• Tsunami

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Question Y

• Which of the following is the main volcanic
  hazard for Bellingham?
• Pyroclastic Ash Fall
• Lahar (mudflow)
• Volcanic landslide
• Tsunami

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Question Y

• Which of the following is the main volcanic
  hazard for Bellingham?
• Pyroclastic Ash Fall
• Lahar (mudflow)
• Volcanic landslide
• Tsunami

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Question Z

• Which of the following is the least important
  volcanic hazard for Bellingham?
• Pyroclastic Ash Fall
• Lahar (mudflow)
• Lava flows
• Pyroclastic Ash Flow (nuée ardente)

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Question Z

• Which of the following is the least important
  volcanic hazard for Bellingham?
• Pyroclastic Ash Fall
• Lahar (mudflow)
• Lava flows
• Pyroclastic Ash Flow (nuée ardente)