Definition

Noun: A volcanic eruption is the sudden, often violent, release of materials from a volcano. This includes the ejection of steam, ash, lava, and rock fragments.

Usage

This term is used to describe the specific geological event when a volcano becomes active and expels its contents. It is a countable noun.

Examples

• The volcanic eruption in 1883 was one of the most powerful in recorded history.
• Scientists are monitoring the mountain for signs of an imminent volcanic eruption.
• The island was formed by a series of ancient volcanic eruptions.

Advanced Usage

• "to trigger a volcanic eruption": to cause an eruption to begin.
  • A large earthquake can sometimes trigger a volcanic eruption.
• "the aftermath of a volcanic eruption": the period and conditions following an eruption.
  • The aftermath of the volcanic eruption left the surrounding towns covered in ash.

Variants and Related Words

• Eruption (n): A more general term for a sudden, violent outbreak or discharge, which can also apply to volcanoes, skin, violence, or noise.
  • The eruption of Mount St. Helens was a major event.
  • He had a painful skin eruption.
• Volcanic (adj): Relating to or produced by a volcano.
  • Volcanic rock is often very porous.
• Erupt (v): To burst or force out suddenly and violently.
  • The volcano could erupt at any time.

Synonyms

• Outburst: A sudden release of strong emotion or activity. (Used more figuratively, but can describe a volcanic event in a literary context).
• Explosion: A violent and destructive shattering or blowing apart of something. (Can be used synonymously for very violent eruptions).

Related Phrases

• Pyroclastic flow: A fast-moving current of hot gas and volcanic matter that flows from a volcano during an eruption.
  • The most deadly hazard during a volcanic eruption is often the pyroclastic flow.
• Ash cloud: The plume of fine rock and glass particles ejected into the atmosphere during an eruption.
  • The volcanic ash cloud disrupted air travel across the continent.

Noun

1. the sudden occurrence of a violent discharge of steam and volcanic material