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1.3.2 Volcanoes, processes, hazards and their impacts

Activity 1

# Main questio

What hazards are associated with volcanic eruptions?

# Questions

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- Compare the eruptions seen in Resource A.
- Outline some of the reasons that certain eruptions are explosive and others effusive.

- Name and describe one volcanic hazard seen in Resource B.
- Suggest reasons why this hazard poses a high risk for people living near a volcano.

The pie chart in Resource C is based on an estimate of deaths as a result of volcanic eruptions.

- Which causes are Primary and which are Secondary?
- Which factor caused the greatest proportion of deaths? Suggest reasons why so many died as a result of this hazard.

- Resource A

  Mt. St. Helens, Washington, USA

  Source: https://en.wikipedia.org/wiki/File:MSH80_st_helens_eruption_plume_07-22-80.jpg
  This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior.

  Mt. St. Helens, Washington, UDA

  Source: https://commons.wikimedia.org/wiki/File:Aa_channel_flow_from_Mauna_Loa.jpg
  This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior.

- Resource B

  Mayon, Philippines

  Source: https://commons.wikimedia.org/wiki/File:Mayon_pyroclastic_flow.jpg
  This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code

- Resource C