Volcanic Hazards


Based on your current understanding, which of the following events are considered volcanic hazards? (Choose all that apply.)

The correct answers are a), b), c), d), e), and g).

Tephra, pyroclastic flows, lahars, lava flows and volcanic gases are all volcanic hazards. Some volcanic eruptions can cause tsunamis too. Fissures do not pose immediate danger unless one were to fall into it.


A graphic showing hazards associated with volcanic eruptions.  11 hazards are shown:lava flow, pyroclastic flow, lahar, lava dome collapse, tephra, eruption column, eruption cloud, acid rain, bombs, landslide, fumaroles.

Different volcanic eruptions can produce different hazards. These are some of the more important hazards:

  • Tephra
  • Pyroclastic Flows
  • Lahars
  • Lava Flows
  • Volcanic Gases

Each of these hazards are discussed in the following pages.